march 31 2020

Very large audience for this first course of the containment with 5 listeners which is the maximum allowed by the free version of TeamViewer.

A solution is being studied to accommodate more people with possibly another software.

Our apologies to those who tried in vain to connect.

Some technical problems with the sound of the Master, but a course that was generally audible.

Very nice game of the day with a jungle of variants to clear with a machete.

Next session on April 25th 

Below is the deconfined version of the Master's report 


Master's words


Vincent de paul

"The world is the way it is -- no sir, it is the way we make it" (St Vincent de Paul's reply).

"On the scale of bullshit, there is nothing above co-owners' meeting" (J.-M. Bigard).

"We can certainly keep [SR] as an ambassador of the poles. On the condition that we freeze her in place" (H. Védrine).

"I don't want to die a stupid man, so I'll continue my rock n' slow" (Dick Rivers).

"If a woman finds her husband in the company of a mistress, she kills her (if she is French), she kills the husband (Italian), she kills them both (Spanish), she commits suicide (German), she inquires about alimony (American). Modern" version: she organises an orgy (all countries)".

"The strange alliance of demo-plutocracies and communism has sometimes been a source of surprise. What could these international forces, destined by the very logic of their principles to destroy each other, possibly have in common? What they had in common was fear. The fear of being jointly destroyed by national revolutions" (J. Ploncard d'Assac).

Everyone admires and adores Alexander Gristchouk because he does not use cotton wool and is indeed, for this reason, one of the few great players worth listening to. But when I try, very modestly, to do the same, I get kicked out of a forum. Is speech freer in Russia than in France, a country renowned (wrongly?) for its freedom of expression?

A few decades ago, a go player told me that it was possible to write a whole book about a single game. This impressed me, because I could hardly conceive it for chess. Now, thanks to our "electronic friend", I could imagine a book containing only three or four games such as Bird-Morphy, Capablanca-Bogolyoubov, Tal-Keller, Shirov-Eingorn and, why not, only one of them. On condition that the analysis is further extended, that a new quantity of the mini-studies that keep appearing is discovered.

Even better, a whole book on the treatment of a single diagram, Crosskill's Rook and Bishop vs. Rook which opens (without explanation) my 1998 edition. I would gladly buy such a book, provided it made this study perfectly clear, and not like those multiple "secrets (sic!) of x endings" scams that just blow smoke and thicken the mystery. Also a clear statement of the win with 2 bishops against knight without pawns. Alas! I am afraid that my only chance to read such a book is... to write it.

For no one is foolish enough for this kind of work. I have read a nice admission from I don't know which author on the endgames: "Without computer analysis, I would never have embarked on such an insane task". If I understand him correctly, I was an insane man in 1980. He thus paid me (unintentionally) one of the highest compliments of my life. No doubt my dementia has not diminished much since then, but... my energy is not what it was 40 years ago! And for the above examples, the computer itself is not enough. For the genesis of the "demented" work, read again http://lecoursdumaitre.e-monsite.com/pages/cours/cat-2017/11-avril-2017.html 

The Morphy-Arnous de Rivière rook endgame is a convincing example of... little we knew... and know about Chess. Only, the final rescue had been brilliantly mastered by Maroczy, but the previous mistakes are not at all where people thought they were...Kozirev

PM places a magic trick that allows us... a small revision in 2 endgames. Then a missed "problem move" a month ago against our French female champion. Finally another performance with Queen and Bishop against a lone Queen.

Exercises for the next session: Knight and pawn against Bishop; an astonishing ballet of Knights which makes the chessboard vibrate. An "aristocratic" relaxation (without pawns). Two tactical stunts of the hero... or of his opponents whom he inspires!

Gligoric 3Our game of the day presents us with a arm-wrestling battle, played almost 40 years ago, between... the two rook-pawns of the king-side! The BenOni ("son of my tears") opening had been presented 4 times in our course, the last one on 20 February 2018. An opening that fascinated me, that I fought with White more than 40 years ago, with mixed success!  Read about it at http://lecoursdumaitre.e-monsite.com/pages/cours/cat-2006/14-novembre-2006.html Do not miss, in the variation of the 31st move, an astonishing promotion to Knight. Nor, in the 37th move, an incredible move of the Black Rook!

 

GiegoldTraining. The first 2# have a particularity (quite rare in the world of problems) that you will discover quite quickly and that... will help you in solving the 3# & 4#! Of the other 10, the last 2 seem to us to be the easiest. A French masterpiece in 3# which was alluded to in the last lesson (we leave the solution, exceptionally, with orders to hide it!). Then 2 other 3# mats and 3 4# mats with the particularity already mentioned (the Havel had impressed me at the age of 14). The last 4# is a repair for my March 10th mistake.

Paavilainen 1

3 helpmates : the one in 3 is a "cycle", the one in 8 is easier than the author's name suggests. Finally 2 selfmates, including a masterpiece in 5 by a former world champion solver. Here again, out of sheer magnanimity, we omit to delete the solution.

Have a good time. See you at the end of April. Deus vos custodiat.

PGN Reader

Master's diagrams

[Event "?"] [Site "?"] [Date "1863.??.??"] [Round "?"] [White "Morphy, Arnous de Rivière"] [Black "0400.13"] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/p3k3/7R/1p1p4/5K2/8/Pr6/8 w - - 0 38"] [PlyCount "55"] [EventDate "1863.??.??"] [SourceDate "2000.07.25"] 38. Ra6 (38. Ke5 Re2+ $3 {[#](avoids confinement of Black King on the 8th row)} (38... Rxa2 $2 39. Rh7+ $8 Kd8 40. Rb7 $1 a6 41. Kxd5 $8 Kc8 42. Kc6 $1 {(or Rh7!)} Rh2 {(...Rc2+ Kb6!)} 43. Ra7 $1 Rh6+ 44. Kc5 Kb8 45. Rg7 $11) (38... Kd7 $2 39. Kxd5 $1 {(or a4!)} Rxa2 40. Rh7+) 39. Kxd5 Rxa2 $8 40. Rh7+ (40. Kc5 a6 $8) 40... Kf6 $8 41. Kc5 a6 $8 42. Rh6+ Kg7 $1 {(or on g5 but not ...Kf5? Kb4!!=)} 43. Rh4 (43. Rb6 Ra4 $8 44. Rd6 b4 $8 45. Rb6 a5 $8 $19) 43... Rc2+ $8 44. Kb4 (44. Kb6 Rc4 $8) 44... Rb2+ $1 {(with wK star escapement)} 45. Ka3 ( 45. Kc5 a5 $8) (45. Ka5 Ra2+ $8) (45. Kc3 Rb1 $1 {idem}) 45... Rb1 $1 46. Ka2 ( 46. Rf4 Kg6 $1 {but not ...a5? Ka2! ...Rh1 Rf5!=}) 46... Rg1 $1 47. Kb3 Kf6 $1 $19) 38... Re2 $1 {[#]} 39. a3 (39. Kf3 Re4 $1 (39... Re6 $1) 40. Ra5 (40. Rxa7+ Kd6 $8) 40... Ra4 $1 41. Rxb5 Ra3+ $1 42. Ke2 Kd6 $3 (42... Rxa2+ $2 43. Kd3 $8 Kd6 44. Rb8 $3 {[#]} a5 {(would win with bR in a1)} 45. Ra8 $1 a4 46. Kc3 $1 a3 47. Rd8+ $8 {(this is why you had to come to the 8th ; and not Kb3? ...Ra1!!)} Kc6 48. Rc8+ $8 Kd7 {(...Kb7 Rc5!)} 49. Ra8 $8 Ra1 50. Ra6 $8 $11) 43. Kd2 (43. Rb8 a5 $1 44. Kd2 Rxa2+ $1 45. Kc3 Ra3+ $1 46. Kb2 Ra4 $3) (43. Rb2 a5 $1) 43... Rxa2+ $1 44. Kc3 a5 $1 45. Rb8 Ra3+ $1 46. Kd4 Ra4+ $8 47. Kd3 Rc4 $1 $19) (39. Rxa7+ Kd6 $8 40. Kf3 Re7 $1 41. Ra5 Kc6 $1 42. Ra6+ Kc5 $8 $19) (39. Ra5 Kd6 $1 40. Rxb5 Rxa2 $1 $19) 39... Kd7 $1 40. Rxa7+ (40. Kf3 Re8 $1 (40... Re6 $2 41. Rxa7+ $8 Kd6 42. Ra5 $8 Kc5 43. a4 $8 $11) 41. Rxa7+ Kc6 $1 $19) (40. Rh6 d4 $1 41. Rg6 (41. Rh7+ Kc6 $1 42. Rxa7 d3 $1) 41... Kc7 $1 42. Rh6 a5 $19) 40... Kc6 $1 $19 41. Kf3 (41. Ra8 d4 $1 42. Kf3 (42. Rd8 Kc5 $1) 42... Re7 $1 43. Rd8 Kc5 $8 $19) (41. a4 Re4+ $1) 41... Re4 (41... Re8 $1 42. Ra6+ (42. Kf2 d4 $1) 42... Kc5 $8 43. Ra7 d4 $8) 42. Ra8 Ra4 $6 {This natural move, in fact, complicates the task.} (42... Kc5 $1 43. Rc8+ Kd4 $8 44. Rb8 Kc4 $1 ({probably simplest is} 44... Re3+ $1 45. Kf2 Rb3 $1 46. Ke2 Kc3 $1 47. Rc8+ Kb2 $1 48. Rc5 Kxa3 $1 $19) ({or} 44... Re6 $1 {(controlling the advance of the "a" pawn)} 45. Rxb5 Kc4 $8 46. a4 d4 $8 47. Rb8 d3 $8 48. Rd8 Kc3 $8 49. a5 d2 50. Rc8+ Kb2 51. Rb8+ Kc2 52. Rc8+ Kd1 53. Kf2 Rf6+ $1 54. Kg2 Ra6 $3 {[#]} 55. Rc5 Ke2 $8 56. Re5+ Kd3 $8 57. Rd5+ Ke3 58. Kg3 {(Re5+ ...Kd4)} Rxa5 $8 $19) ({but not} 44... Re7 $2 45. Rxb5 $8 Kc4 46. a4 $1 d4 47. Rb6 $3 d3 48. Rd6 $3 Kc3 49. a5 $1 d2 50. Rc6+ $8 Kb2 51. Rb6+ $1 Kc2 52. Rc6+ $8 Kd1 53. Kf2 $8 Rf7+ 54. Kg2 { (compare the Rc6/Rf7 formation with that of the previous variation Rc8/Rf6)} Ra7 55. a6 $8 $11) 45. Rc8+ Kd3 $8 46. Rb8 (46. Rc5 d4 $1) 46... d4 $1 47. Rxb5 Re3+ $1 48. Kf2 (48. Kf4 Kc4 $1 49. Rb4+ {(Rb8 ...Rxa3!)} Kc3 $8 50. Rb8 Re7 $1 51. Kf3 d3 $1 $19) 48... Re2+ $1 49. Kf1 $1 (49. Kf3 Ra2 $1) 49... Rc2 $3 {[#]} ( 49... Ra2 $2 {(it is not good to go "as far as possible")} 50. Rd5 $3 Ke3 51. Re5+ $8 Kd2 $2 52. Re2+) 50. Rd5 (50. Ke1 Rc1+ $8 51. Kf2 Kd2 $8) 50... Ke3 $8 51. Re5+ Kd2 $8 52. a4 d3 $19) 43. Rc8+ $1 Kd6 {Again, this does not seems to be the best.} ({Why not go through the "a" column?} 43... Kb6 $1 44. Rc3 d4 $1 45. Rd3 Rc4 $1 46. Ke2 Ka5 $8 47. Kd2 Ka4 $8 48. Rh3 Rc3 $1 $19) 44. Rc3 {Presented as an exercise by Tarrasch with the two questions: how does Black win and, as played, how does White draw ? But this is much more difficult than he thought himself} d4 $2 {The "passed" pawns must be "pushed", of course, but there is a time for everything! However, this was not the fault in Tarrasch's mind!} ( 44... Re4 $3 {(the white king must be kept at bay, at least for the time of a... Z, with wR in focal position, controlling c5 and the 3rd rank; and the wK leering at e4, paralysing the "d" pawn)} 45. Rc1 (45. Rb3 Kc5 $8 46. Rb1 { (Rc3+ ...Rc4!)} Rh4 $1 47. Ke2 Rh3 $1 48. Rc1+ Kd4 $1 49. Rb1 Kc4 $1) (45. Kf2 d4 $3) 45... Rc4 $1 46. Rb1 Rc3+ $1 (46... Kc5 $1 47. Ke2 Rc3 $3 {idem}) 47. Ke2 Kc5 $3 $19) (44... Rc4 $6 45. Rb3 $1 Kc5 $8 46. Ke2 {(in comparison with what precedes, there is no more ...Rc3!)} Rc2+ $8 47. Kd3 Rh2 $1 48. Rc3+ Kd6 $8 (48... Kb6 $2 49. Kd4 $8 Rd2+ 50. Ke5 $11) 49. Rc8 Rh3+ $8 50. Kd4 Rxa3 $8 51. Rd8+ Kc7 $8 52. Rxd5 Kb6 $8 53. Rh5 Ka5 $19) (44... Rh4 $2 45. Ke2 $8 Rh2+ 46. Kd1 $8 Ra2 47. Kc1 $1 d4 48. Rh3 $1 Kc5 49. Kb1 $8 $11) 45. Rb3 $1 (45. Rd3 $1 Rc4 46. Ke2 $8 (46. Ke4 $2 Kc5 $1 $19) 46... Kc5 47. Kd2 $8 $11) 45... Kc5 { Threatening ...Kc4 but also ...b4.} 46. Ke4 $2 {The "active" move is a mistake, which nobody had guessed. However, king's access to d2 must be kept.} ( 46. Ke2 $3 Ra8 (46... Kc4 47. Rh3 $1 $11) 47. Kd2 $3 (47. Kd3 $2 Rh8 $1 {: text}) (47. Rh3 $1 Kc4 48. Kd2 $8 Rg8 49. Rh7 $1 Rg2+ 50. Kc1 $8 {idem}) 47... Rh8 48. Rg3 $3 {(or on f3)} Rh2+ 49. Kc1 $8 Kc4 50. Rg8 $1 Kb3 51. Rb8 $3 {[#]} (51. Ra8 $2 Rc2+ $1 52. Kd1 {(Kb1 ...d3)} Ra2 $3 53. Rb8 Kc4 $1 54. Rc8+ Kd3 $8) 51... Rc2+ (51... Rh5 52. Ra8 $8 Kc3 53. Rc8+ $8 {: with the wK in d1, there would be ...Kb2!}) 52. Kd1 $8 (52. Kb1 $2 Rc5 $8 53. Ra8 d3 $1) 52... Rc5 53. Ra8 $8 Kc3 54. Kc1 $8 Rh5 55. Rc8+ Kb3 56. Ra8 $8 Rh2 57. Rb8 $8 Rc2+ 58. Kd1 $8 Rc5 59. Ra8 $8 $11 {: we're back in the 53rd !}) 46... Ra8 $3 (46... Kc4 $6 {(waste of time)} 47. Rd3 $1 (47. Rh3 $6 Ra8 $1) 47... Kc5 $8 48. Rb3 Ra8 $1 { : text}) 47. Kd3 (47. Rh3 Kc4 $1 (47... b4 $1 48. axb4+ Kc4 $8) 48. Rh7 Re8+ $1 (48... Rxa3 $1) 49. Kf3 d3 $1) 47... Rh8 $1 48. Kd2 {Too late: the rook should be in g3 or f3!} Rh2+ $8 49. Kc1 (49. Kd1 $6 Kc4 $1 50. Rb4+ Kc3 $1 51. Rxb5 Rh1+ $8 52. Ke2 d3+ $8) 49... Kc4 $1 (49... Ra2 $1 50. Rh3 Kc4 $8 51. Kb1 Re2 $1) (49... Re2 $1 50. Rh3 Re3 $1) 50. Rg3 (50. Rb4+ $6 Kc3 $1) 50... d3 $6 {Given as a mistake, but just slows the win.} (50... Ra2 $3 51. Kb1 (51. Rh3 d3 $3 {(now, yes !)} 52. Rh8 Rxa3 $1 53. Kb2 Rb3+ $1 54. Kc1 Rc3+ $1 55. Kd1 Rc2) 51... Re2 $1 {(for ...Re3)} 52. Rg8 (52. Rg5 d3 $1 53. Kc1 Ra2 $1) (52. Rg4 Kb3 $1 53. Rg3+ Re3 $1) 52... Kb3 $1 53. Kc1 Kxa3 $19) ( 50... Re2 $2 51. Rg8 $3 {(draws with King on c1, loses with King on b1)} Kb3 52. Rb8 $3 {as already seen 46e}) 51. Rg8 $1 Ra2 $2 {This is one, however on the other hand} (51... Rf2 $2 {(White on the line runs away)} 52. Kd1 $3 {[#]} (52. Rb8 $2 Kc3 $8 53. Rc8+ Kb3 $8 54. Rb8 d2+ $3 55. Kd1 Rf5 $8 56. Ra8 Kc3 $8 57. Rc8+ Kb2 $8 58. Ra8 Rf3 $8) 52... Kb3 53. Rb8 $8 Rf5 {(no ...d2+!)} 54. Ra8 $8 Kc3 55. Rc8+ $8 Kb2 56. Ra8 $8 $11 {: there is no ...Rf3-b3! as with the pawn on d4... or on d2}) (51... Kb3 $3 {(or on c3)} 52. Ra8 (52. Rb8 d2+ $8 53. Kd1 Rh5 $8 54. Ra8 Kc3 $8 55. Rc8+ Kb2 $8 56. Ra8 Rh3 $3 {below}) (52. Rg5 Rc2+ $1 {(or ...Ka4! Rd5 ...Rc2+! Kb1 ...Rc3!)} 53. Kd1 Ka4 $8 54. Rd5 Rc3 $8) 52... d2+ $3 {[#]} 53. Kd1 Kb2 $8 54. Ra7 {(as above, but with the d3-pawn on d2, which seems less good, but is much better !)} (54. Rb8 Rh5 $8 55. Ra8 Rh3 $8) 54... Rh3 $3 55. Rb7 (55. Kxd2 Rxa3 $8) 55... Rb3 $3 {[#]} 56. Kxd2 Kxa3 $8 57. Kc2 (57. Kc1 Ka2 $8 58. Ra7+ Ra3 59. Rb7 Rc3+ $8 60. Kd2 Rc5 $1 61. Kd3 Kb3 $1) 57... Rb2+ $8 58. Kc1 b4 $8 59. Rb8 Rh2 $1 60. Rb7 Kb3 61. Rb8 Rh1+ 62. Kd2 Rb1 $3 $19 {[#]Chéron}) 52. Rc8+ $1 (52. Ra8 $1 Kb3 (52... b4 53. Rc8+ $8) 53. Rb8 $8 {idem}) 52... Kb3 53. Rb8 $8 {The black Rook has locked itself in. If it were on h2, the ...d2+!! push would win as already seen. She was well on a2 when her White colleague was not yet on the 8th rank, as studied on the move 50 !} Rc2+ 54. Kd1 $8 (54. Kb1 $2 Rc5 $1 (54... Rb2+ $1 55. Kc1 Kxa3 56. Ra8+ Kb3 $8) 55. Rd8 Rc3 $8 56. Rb8 Kxa3 $1 (56... d2 $1 57. Rxb5+ Kc4) 57. Rxb5 d2 $1 (57... Rb3+ 58. Ka1 $1 d2 $1 59. Rd5 Rc3 $1) 58. Ra5+ Kb4 $19) 54... Rc5 {Here Morphy played 55 Kd2. Do you approve of this move ?} 55. Ra8 $3 {[#]} (55. Kd2 $2 Kxa3 $8 56. Kxd3 b4 $1 {0-1 Morphy-Arnous de Rivière}) 55... Kb2 (55... Kc3 56. Ra7 $1 (56. Kc1 $2 d2+ $1 57. Kd1 Rh5 $1 {as already seen on 51st}) 56... Rh5 57. Rc7+ $8 Kb3 58. Ra7 $8 Rh1+ 59. Kd2 Ra1 60. Ra5 $1 (60. Rb7 $1) 60... Kc4 61. Ra8 $1 Ra2+ 62. Kd1 $11) (55... Kc4 56. Kd2 $1 $11) 56. Kd2 $1 (56. Ra5 $1 Kc3 57. Ra8 $1 d2 58. Rh8 $3 {(express switchback on the 3rd row)} (58. Rd8 $2 Rh5 $1 59. Rc8+ Kb2 $8) 58... Rg5 59. Rh3+ $8) (56. Ra7 $1) 56... Rc3 (56... Rc2+ 57. Kxd3 $1 Rc3+ 58. Kd4 $8 Rxa3 59. Rb8 $8 Rb3 60. Kc5 $1 Rc3+ 61. Kb4 $1 $11 { Maroczy}) 57. Ra5 $8 Rb3 58. a4 $3 {[#]} b4 59. Rb5 $8 {Black Rook is quite passive.} Ka3 60. a5 $8 Ka4 (60... Rc3 61. a6 $1) 61. Rb8 $1 (61. Rd5 $1 Rc3 62. Rxd3 $1 $11) 61... Kxa5 62. Ra8+ $8 Kb5 63. Rb8+ $8 Kc6 64. Ke3 $1 (64. Rd8 $1 Ra3 (64... Rc3 65. Rc8+ $8) 65. Rxd3 $8) (64. Rc8+ $1 Kb6 65. Rb8+ $8) 64... Kc7 (64... Kc5 65. Rc8+ $8 Kb5 66. Rb8+ $8) 65. Rb5 $1 {[#]Simplest, given by Maroczy.} (65. Rh8 Rc3 66. Rh4 $8 b3 67. Rb4 $1 Kc6 68. Kd2 $1 $11) 1/2-1/2 [Event "?"] [Site "?"] [Date "1859.??.??"] [Round "?"] [White "Morphy, Thompson J"] [Black "0133.12"] [Result "1/2-1/2"] [SetUp "1"] [FEN "4k3/pp2n1K1/6RP/8/8/1b6/8/8 w - - 0 1"] [PlyCount "18"] [EventDate "1859.??.??"] [SourceDate "2000.07.25"] {What is the best chance for White ?} 1. Re6 $3 (1. h7 $4 Nxg6 $8 2. Kxg6 Bc2+ $8 3. Kf6 Bxh7 $8 $19) (1. Ra6 bxa6 $1 (1... Nf5+ $1 2. Kg6 Nxh6 $11) 2. h7 $8 Ng6 $8 3. Kxg6 $8 Bc2+ $8 4. Kf6 $8 Bxh7 $8 5. Ke5 $8 $11) (1. Rf6 $6 Bc2 $8 2. Rf2 Nf5+ $1 (2... Bd3 $1) 3. Kg6 Bd3 $1 (3... Nxh6+ $2 4. Rxc2 Ng4 5. Re2+ $1 Kd7 6. Kg5 $8) 4. Rd2 (4. Rf3 $2 Nh4+) 4... Nxh6+ $1 (4... Bb1 $1 $11) 5. Rxd3 Ng8 $3 $11) 1... Bxe6 $6 (1... Bc2 $1 2. Kf6 Kf8 $8 3. Rxe7 Kg8 $8 4. Rxb7 Be4 (4... a5 5. Rb2 Bd3 $11) 5. Rxa7 Bd3 $11 {Cozio}) 2. h7 $8 {The continuation of the game, won by White, is unknown.} Bc4 $1 (2... Ng6 $2 3. Kxg6 $8 Bf5+ 4. Kxf5 $8 $18 {: roman theme}) (2... Nd5 $1) (2... Kd7 $1) 3. h8=Q+ $8 Kd7 $8 4. Qb8 Bd5 $3 {[#]} (4... Ke6 $2 5. Qxb7 $8 (5. Qxa7 $2 Bd5 $1 $11) 5... Bd5 (5... a5 $6 6. Qe4+) 6. Qxa7 $18) (4... Nc6 $2 5. Qxb7+ $8 Kd6 6. Qc8 $1 (6. Kf6 a5) 6... Kc5 7. Kf8 $3 {and the monster gives a win in 126 moves ! }) (4... b5 $2 5. Qxa7+ $1 Kd6 6. Qb8+ $1 Kd5 7. Qd8+ $1 Ke6 8. Qe8 $1 Kd6 9. Qf8 $1 Ke6 10. Qf6+ $1 Kd7 11. Qe5 $3) 5. Qxa7 Bc6 $1 (5... Nc8 $1) (5... Kc6 $2 6. Kf6 $8) (5... Kd6 $1 6. Kf6 Ng8+ $8) 6. Kf6 Nd5+ $1 7. Ke5 Ne7 $1 8. Qd4+ Nd5 $1 (8... Kc8 $1 9. Ke6 Nd5 $8 $11) (8... Bd5 $2 9. Qg4+ $1 Kc7 10. Qg3 $3 Kd7 11. Qh3+ Kc7 12. Qh7 $18) 9. Qg4+ Kc7 $8 {A Karstedt-like fortress, but it would be losing without the b7-pawn! Unless you give the move to Black: then ...Kb8!! draws (but not ...Bb7? Qg8!! : bK is not where it should be).} 1/2-1/2 [Event "?"] [Site "?"] [Date "2020.??.??"] [Round "?"] [White "Nasuta G, Guichard P"] [Black "4400.54"] [Result "1-0"] [SetUp "1"] [FEN "5Q2/1pp5/p5r1/6pk/4P3/1PPq4/1P4PK/5R2 w - - 0 38"] [PlyCount "9"] [EventDate "2020.??.??"] [SourceDate "2000.07.25"] 38. Rh1 $3 {Ambush.} (38. g4+ $2 {(thematic try)} Kxg4 $11 (38... Kh4 { also}) 39. Qf5+ Kh4 40. Rf3 Qe2+ 41. Kh1 Qd1+ {0,5-0,5 Nasuta-Guichard}) (38. Qf5 $6 Kh6 39. Qf8+ $1 (39. g4 $1 Qd2+ 40. Kg3 $1 Qe3+ 41. Kg2 Qd2+ 42. Rf2) 39... Kh5 (39... Rg7 40. Qh8+ $1) 40. Rh1 $3) (38. Qf7 $6 Qd6+ $1 39. g3 $1 Qd2+ (39... Kh6 40. Rh1 $3) 40. Rf2 $8 Qd6 41. Qh7+ $1 Rh6 42. Qf5 $1 {(threat Kh3 and g4#)} Re6 43. Kg1 $1 Qd1+ 44. Rf1 Qg4 $1 {still resists}) 38... Qe3 { The threat was obviously Kg1+.} (38... Qxe4 39. Kg3+) (38... Kg4 39. Qf5+) ( 38... Qd6+ 39. Kg1+) (38... Rd6 39. Kg1+ Kg6 40. Rh6#) 39. g4+ $3 {[#]Realizing plan after adequate preparation.} (39. Qf7 $6 g4 (39... Kh6 40. g4) 40. Rf1 $3) 39... Kxg4 (39... Kh4 40. Kg2+ $1) 40. Qf5+ $8 Kh4 (40... Kh5 41. Kg2+ $1) 41. Kg2+ $8 {The difference.} Qh3+ 42. Rxh3# 1-0 [Event "?"] [Site "?"] [Date "1977.??.??"] [Round "?"] [White "Kozirev, V."] [Black "0014.12"] [Result "1-0"] [SetUp "1"] [FEN "8/6p1/8/1p1P4/4n2K/8/4NB2/3k4 w - - 0 1"] [PlyCount "39"] [EventDate "1977.??.??"] [SourceDate "2000.07.25"] {Quite a long solution, with a Queen & Bishop struggle against Queen & Pawn from the 11th move and a "rest" move on the 14th.} 1. Nc3+ $8 {With 2 attacked pieces, you have to bet everything on the free pawn.} (1. Ng3 $2 g5+ $3 2. Kh5 (2. Kh3 Nxf2+ $8) 2... Nf6+ $8) 1... Nxc3 2. d6 $8 g5+ $1 (2... Ne4 3. d7 $8 g5+ 4. Kh3 $8 $18) 3. Kh3 $3 {[#]} (3. Kxg5 $2 Ne4+ $8) (3. Kg4 $2 {(or on h5)} Ne4 $1 4. d7 Nf6+ $8) 3... Nd5 (3... Ne4 4. d7 $8 Nxf2+ 5. Kg2) (3... g4+ 4. Kh2 $1 (4. Kh4 $1)) 4. d7 $8 Nf4+ 5. Kg4 $8 (5. Kg3 $2 Ne6 $8 6. Bb6 b4 $11) 5... Ne6 6. Bb6 $8 (6. Kf5 $2 Nd8 $8 7. Bb6 Nb7 $1 8. Ke6 b4 9. Kd5 b3 10. Kc6 b2 $11) 6... b4 7. Kf5 $8 b3 8. Kxe6 $8 b2 9. d8=Q+ $8 Ke2 $1 {And now, how to do it, knowing that Queen + Bishop against Queen is normally a draw ?} (9... Kc2 10. Qc7+ $8 Kd2 11. Qh7 $1) 10. Be3 $3 {[#]} (10. Qd4 $2 b1=Q $8 11. Qf2+ Kd1 $8 12. Qf1+ Kc2 $8 13. Qf5+ Kb2 $11) 10... b1=Q (10... Kxe3 11. Qb6+) 11. Qd2+ $8 Kf3 12. Qf2+ $8 Kg4 ( 12... Ke4 $6 13. Qf5+ $8) 13. Qg2+ $8 Kh4 14. Kf6 $3 {[#]The "difficult" move of the study. We still threaten mate in 2.} Qa1+ 15. Kf7 $8 {Despite the great space, black Queen has no more check.} (15. Kg6 $2 Qa6+ $8 16. Kg7 Qe6 $1 ( 16... Qd3 $1) 17. Qxg5+ Kh3 $11) 15... Qc3 (15... Qe5 16. Bf2+ $8 Kh5 17. Qh3#) (15... Qa3 16. Qxg5+ $8 Kh3 17. Qf5+ {as in the text}) (15... g4 16. Qh2#) 16. Qxg5+ $8 Kh3 17. Qf5+ $8 Kg3 (17... Kg2 18. Qf2+ {idem}) 18. Qf2+ $8 (18. Qf4+ $6 Kg2 (18... Kh3 19. Qf3+ $1) 19. Qf2+ $1 Kh3 20. Qf3+) 18... Kh3 (18... Kg4 19. Qg2+ $1 Kh4 (19... Kf5 20. Qg6+ Ke5 21. Qe6#) 20. Bf2+ Kh5 21. Qg6#) 19. Qf3+ $8 {And now it falls.} Kh2 (19... Kh4 20. Bf2+ $1) 20. Bf4+ $1 1-0 [Event "Jugoslavija (ch) "] [Site "?"] [Date "1982.??.??"] [Round "?"] [White "Gligoric, S."] [Black "Barlov, D."] [Result "1-0"] [ECO "A75"] [PlyCount "81"] [EventDate "1982.??.??"] [SourceDate "2000.07.25"] {33/139} 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 (7. Bf4) 7... Bg7 8. Be2 O-O 9. O-O a6 (9... Bg4 10. Nd2 (10. Bf4 a6 11. a4 {: text}) 10... Bxe2 11. Qxe2 Re8 12. Nc4 b5 13. Nxb5 Nxe4 14. Qc2 a6 15. Nc3 Nxc3 16. bxc3 Qf6 17. Qa4 Rd8 {Li Chao2 (2732)-Guseinov,G (2646)/Riyadh 2017}) (9... Re8 10. Nd2 Nbd7 (10... b6 11. f3 Ba6 12. Bxa6 Nxa6 13. Nc4 $16 { Ushenina,A (2500)-Svidler,P (2746)/Tromso 2013}) 11. Qc2 Ne5 12. b3 Bg4 13. Bxg4 Nfxg4 14. Bb2 a6 15. h3 Nf6 16. f4 Ned7 17. Nc4 Nb6 18. Rae1 Nxc4 19. bxc4 Nd7 20. e5 dxe5 21. f5 b5 22. Ne4 Nb6 {(Aronian,L (2786)-Caruana,F (2794)/ Moscow 2016)} 23. fxg6 fxg6 (23... hxg6 24. Rxf7 $3) 24. d6 $1 Nxc4 25. Bc1 Ra7 (25... Nxd6 26. Rd1) 26. Bg5 $16) 10. a4 (10. e5 dxe5 11. Nxe5 Nbd7 $11) 10... Bg4 (10... Re8 11. Nd2 Nbd7 12. Qc2 Rb8 13. a5 Qc7 14. h3 b5 15. axb6 Nxb6 16. Re1 Nfd7 17. Nb3 $14 {Van Wely,L (2653)-Giri,A (2642)/Eindhoven 2010} ) 11. Bf4 (11. Nd2 {(the most logical, but is it the best ?)} Bxe2 12. Qxe2 Nbd7 13. Nc4 Nb6 14. Ne3 Re8 (14... Qe7 15. a5 Nbd7 16. Nc4 Ne5 17. Nb6 Rae8 $11 {(Harikrishna,P (2504)-Bu Xiangzhi (2558)/Lausanne 2001)} 18. f4 Ned7 19. Nxd7 Nxd7 20. e5 $1 dxe5 21. f5 $1 {(as in Bilek-Thiellement 1964, but not as strong !)} e4 $1 22. Be3 Qh4 $11) 15. Qc2 Qe7 (15... Rb8 16. Bd2 Nbd7 17. a5 Nh5 18. Ra3 Qh4 19. g3 Qh3 20. Bc1 Bd4 21. Ne2 Ne5 $11 {Anand,V (2790) -Hernandez,G (2565)/Mirabal rapid 2001}) 16. f3 Nh5 17. g4 (17. Ne2) 17... Nf6 18. Bd2 Nfd7 19. Rae1 (19. a5 Nc8) 19... Ne5 20. b3 $6 (20. a5) 20... c4 $15 {Bellia,F (2448)-Firouzja,A (2600)/Tegernsee 2018}) (11. h3 Bxf3 12. Bxf3 Nbd7 13. Bf4 Qe7 (13... Qc7 14. a5 Rfe8 15. Qc2 c4) 14. Re1 (14. a5) 14... Rab8 15. Be2 Ne8 16. Bf1 Nc7 17. Qd2 Rfc8 18. Bg3 Qf8 19. f4 b5 20. axb5 axb5 21. e5 b4 22. Ne4 dxe5 23. fxe5 Nxe5 {(Nyzhnyk,I (2635)-Cyborowski,L (2543)/Legnica 2013)} 24. Ra7 $1 $16) 11... Bxf3 {Most "experts" considered, 40 years ago, that this ensures complete equality !} (11... Re8 12. Nd2 Bxe2 13. Qxe2 Nh5 14. Be3 Nd7 15. a5 Nhf6 (15... Qe7 16. Ra4 Nhf6 17. h3 {Giffard,N (2359)-Jojua,D (2543)/Cappelle la Grande 2013}) (15... Bd4) 16. f3 Ne5 17. Rfb1 Qc7 18. Ra3 (18. h3 $1) 18... Rac8 19. h3 $16 {Villeneuve,A (2295) -Poulsson,E (2380)/Oslo 1981}) 12. Bxf3 Ne8 (12... Re8 13. Re1 Qc7 (13... Nfd7) 14. e5 $1 dxe5 15. d6 Qb6 (15... Qd7 16. Bg5 $1) 16. a5 Qb4 (16... Qxb2 17. Na4 ) 17. Ra4 (17. Bg5) 17... Qxb2 {(Gligoric,S-Cvitan,O/Jugoslavija (ch) 33/138 1982)} 18. Bc1 $1 Qxc3 19. Re3 $16) (12... Qc7 13. Rc1 (13. Re1 Nbd7 14. Be2 Rfe8 15. Bf1 c4 16. a5) (13. e5 $1 dxe5 14. d6) 13... Nbd7 14. b4 Rfe8 15. a5 Qb8 (15... Ne5 16. Na4) 16. bxc5 Nxc5 17. Na4 Nxa4 18. Qxa4 Qd8 19. Qb4 Bf8 $16 {Byrne-Reshevski/New York 1956}) (12... Qe7 13. Re1 Nbd7 14. a5 Rfe8 15. Qd2 h5 16. Bd1 Rab8 17. Ba4 {Beliavsky,A (2616)-Palliser,R (2444)/Rogaska Slatina 2011}) 13. Qd2 $1 (13. a5 Nd7 14. Qd2 Rb8 15. Na4 b5 16. axb6 Nxb6 17. Qa5 Nxa4 18. Qxd8 Rxd8 19. Rxa4 Nc7 20. b3 {Kozul,Z (2593)-Gashimov,V (2703)/Dresden 2008}) 13... Qe7 (13... Nd7 14. Bg5 {SG} (14. a5) 14... Bf6 (14... Qc7 $2 15. Be7) 15. Be3 Nc7) 14. Bg5 (14. Rae1 Nd7 15. Bd1 $1) 14... Qe5 $6 (14... Bf6) 15. Rfe1 $146 (15. a5) 15... Nd7 16. Rad1 {White rooks are positioned on central columns, as in an open opening !} Nc7 $6 (16... h5) 17. Bg4 $1 Nb6 (17... Nf6 $2 18. Bf4 $1 Qe7 19. e5) 18. Qc1 {For Bf4 followed by e5, which could be played immediately, notwithstanding ...Ne8.} Qe8 (18... f6 19. Bh4 Qe8 20. Bg3 Rd8 21. b3) 19. e5 $1 {[#]"The only way to keep initiative and defuse the attack of the white "a" pawn" (SG).} dxe5 (19... Bxe5 $2 20. f4 Bd4+ 21. Rxd4 $18) 20. a5 (20. d6 Ne6 21. Be7) 20... Nd7 $8 ( 20... Nc4 $2 21. d6 $18 {for d7, SG}) 21. d6 Ne6 22. Be7 f5 23. Be2 Nd4 24. Bc4+ Kh8 25. Nd5 Rc8 26. Qg5 {"A nebulous enterprise inspired by the opponent's lack of time" (SG). Too severe: the advantage remains !} ({More simple according to SG} 26. Nc7 $1 Rxc7 27. Bxf8 Rc6 (27... Rc8 28. Be7 $1 $16 {SG}) 28. Be7 $1 b5 29. axb6 Rxb6 30. b3 $16) ({Or even better} 26. b4 $1 Rc6 (26... cxb4 $2 27. Rxd4 $1 exd4 28. Nc7) 27. Nb6 $1 (27. Nc7) 27... Nxb6 28. axb6 $18) 26... h6 (26... Rf7 27. Nc7 $1) 27. Qg3 $1 (27. Qh4 $6 g5 $1 28. Bxg5 (28. Qh3) 28... Qg6 $1 {(SG : the wB cannot move backwards because of...Nf3+)} 29. Re3 $1 (29. Rd3 $1) 29... Qxg5 30. Qxg5 hxg5 31. Rh3+ Bh6 32. Rxh6+ Kg7 33. Rh5 Nf6 $1 ( 33... Kg6 34. Rh3 g4 35. Ne7+ Kg7 36. Rh5 $16) 34. Rxg5+ Kh6 $8 35. Nxf6 Rxf6 36. d7 Rd8 37. Rg8 Rxg8 (37... Rxd7 38. Kf1 {(for Rd3)} e4 39. Rc8) 38. Bxg8 Rd6 $11) 27... Kh7 28. b4 $1 {It is logical to target the supports of the strong Nd4. On the other side, however, there will be even better than f2-f4.} (28. Nc7 $1 Rxc7 29. Bxf8 Rc6 (29... Rc8 30. Bxg7 Kxg7 31. Bd5 Rb8 {(...f4 Qc3)} 32. f4 $1) 30. Bxg7 Kxg7 31. b4 $1 Rxd6 32. bxc5 Nxc5 33. Rb1 $3 {[#]} (33. Rxe5 $2 Nf3+ $8) (33. Qa3 Ne4 $8 34. Bd3 Qd7) 33... f4 {(e5 was threatened)} (33... Nc6 34. Qa3 $18) 34. Qa3 $1 (34. Qxf4) 34... Rc6 35. Qb2 $1 {(this time d4 is threatened)} (35. Qc3 $1) 35... Qb8 (35... Kf8 36. Rbd1) (35... Rd6 36. Qb4 Rc6 37. Bd5) 36. Bd5 Rc8 (36... Rf6 37. Rec1) 37. Bxb7 $18) (28. Bxf8 $1 Nxf8 29. b4 $1) 28... Rh8 $1 (28... cxb4 29. Rxd4 $1 exd4 30. Nc7 {SG}) 29. h4 $3 {[#]The rook-pawn is the hero! The man stronger than the machine: engines do not place this move in the top 4, but later change their mind !} (29. f4 e4 $8) (29. Qh4 g5 $1 30. Bxg5 Qg6 31. f4 $1) (29. f3 Rc6 $1) (29. bxc5 Rxc5 30. Nc7) 29... Rc6 (29... e4 {(that SG believed to be better)} 30. h5 $3 (30. Nf4 Ne5 31. Be6) 30... g5 (30... gxh5 31. Nf4 $1 {or also Qh3!}) 31. Qh3 $1 g4 (31... Rc6 32. Nc7) (31... Be5 32. Rxd4 $1) 32. Qh4 $1 Rc6 33. Rxe4 $3 {[#]} (33. Nc7) 33... fxe4 34. Qxg4 Rf8 (34... Rg8 35. Nc7 Rxc7 36. dxc7) 35. Nc7 Rxc7 (35... Qb8 36. Qxd7) (35... Qc8 36. Ne6) 36. Bxf8 Qxf8 37. dxc7 $18) (29... Nb5 30. Nf6+ $1 ( 30. h5 $1) 30... Nxf6 31. Bxf6 Bxf6 32. d7 $18) 30. Qh3 $6 {(for 31.h5 g5 32. Rxd4!)} ({Stronger} 30. bxc5 $1 {(not considered by SG)} Rxc5 31. Rxd4 $1 exd4 32. Nc7 Qc8 33. h5 $1 (33. Bf7 $1 $18) 33... g5 34. Bxg5 $1 Rxc4 35. Bxh6 $1 Rg8 36. Re7 $18) (30. h5 gxh5 (30... g5 31. Nc7) 31. Nb6 Nxb6 32. axb6) 30... h5 $3 {[#]Nice defence (otherwise it is white pawn which occupies this square) which does not suppresses white advantage, but complicates the demonstration of it !} (30... cxb4 $6 31. Rxd4 $1 (31. Bb3 e4 32. h5 Nxb3) (31. Nc7 Rxc7 32. dxc7 Qxe7 33. Rxd4 Nf6 34. h5 $1 Nxh5 35. g4 $1 Nf6 36. gxf5 g5 37. Qg3) 31... exd4 32. Nc7 Rxc7 (32... Qc8 33. Be6 {(same move on ...Qb8)} Rc3 34. g3) 33. dxc7 Ne5 $8 (33... Qc8 34. Qg3 Ne5 35. Rxe5 Qxc7 36. Bf7 $1) 34. Bd8 $1 Qc6 35. Be2 $1 h5 36. Bxh5 $1 d3 37. Qe3 $1 Qd7 (37... gxh5 38. Rc1) 38. Bd1 $16) 31. Qg3 $1 (31. bxc5 $1 Rxc5 32. Bb3 $3 (32. Ba2 Nc2 33. Re2 Nd4 34. Red2 Qc8 $11) 32... e4 ( 32... Rxa5 33. Nc7 $1 Qc8 34. Ne6 $1 Nxe6 {(...Nxb3 Qxb3)} 35. Bxe6 Rc5 36. Bf7 $1) (32... Qc8 33. Nb6 $1 Nxb6 34. axb6 Rc3 35. d7 $8 Qc6 36. Bd5 $8) 33. Qe3 $1 (33. Nf4 Qc8 $2 (33... Nxb3 34. Qxb3) (33... Rc3 $2 34. Qxc3 $1) (33... Rxa5 $1) (33... Be5 34. Ne6) 34. Bf7 $1 Ne5 35. Qg3 $1 (35. Rxd4 $1 Rc1 {(...Nxf7 d7!)} 36. Rdd1 $1) 35... Rc3 36. Bxg6+ $1 (36. Re3 $1 Rxe3 37. Bxg6+ $3) (36. Qg5 $1) 36... Kg8 37. d7 $1 (37. Re3 $1) (37. Qg5 $1) 37... Nxd7 (37... Qxd7 38. Qxc3) 38. Bf7+ $1 (38. Qg5 $1) 38... Kxf7 39. Qg6+ Kg8 (39... Kxe7 40. Qxg7+) 40. Rxd4 $1 (40. Ne6 $1) 40... Ne5 41. Rd8+ $3 {[#]} Qxd8 42. Qe6+ $8) 33... Nxb3 (33... Nb5 34. Rc1) 34. Qxb3 Rxa5 35. Nc7 $1 (35. Qxb7 $16) 35... Qg8 36. Ne6 Bh6 37. Bf6 $3 {[#](but yeah)} (37. f3 $2 Re5 $1) (37. Rc1 $6 Rb5 38. Qa2 Re5 39. Rc7 Qxe6 40. Qxe6 Rxe6 41. Rxd7 Rg8 42. Rxb7 $16) 37... Rb5 38. Qa2 Nxf6 39. d7 Nd5 $1 40. d8=N $3 {[#](a Knight can be stronger than a Queen)} (40. d8=Q $2 Qxe6 $8 41. Qdxd5 Rxd5 42. Qxd5 Qxd5 43. Rxd5 $11) 40... Qxd8 41. Nxd8 Rxd8 42. Rb1 $18) 31... e4 $1 (31... Nc2 32. b5 $1 axb5 33. Bxb5 Nxe1 34. Rxe1 Qc8 (34... Rc8 35. Nb6) 35. Qb3 $18) (31... Nb5 32. Bxb5 (32. Nb6 $1 Nxb6 33. axb6) 32... axb5 33. bxc5 Rxc5 (33... Nxc5 $2 34. Nf6+) 34. Qb3 $1 $18) 32. Rb1 $2 {Threatens b5 but...} (32. bxc5 $1 Rxc5 33. Ba2 $1 (33. Bb3 Rg8 34. Nb6 Nxb3) 33... Rc2 (33... Nc2 34. Re2 Nd4 35. Red2 {(now that the pawn is on e4, in comparison with the variation 31 bxc5)} Rxa5 36. Nc7) (33... Rxa5 34. Nc7 $1 Qb8 35. Bf7 Ne5 36. Rxd4 Nxf7 37. Rdd1) (33... Rg8 34. Nb6) 34. Bb3 Rc6 (34... Re2 35. Bc4 $1 Rc2 36. Nc7) (34... Nxb3 35. Qxb3 Qc8 36. Rb1) 35. Nf4 $1 (35. Ba4 $1) 35... Be5 36. Bd5 Rc2 37. Qe3 Nb5 38. Ne6 $16) 32... cxb4 $1 { White advantage has melted away, but not the adventure !} 33. Ba2 (33. Rxb4 b5 34. axb6 Nc2 35. Nc7 Qb8 36. Ne6 Nxb4 37. Ng5+ Kh6 38. Nf7+ Kh7 $11) 33... Rc2 $1 34. Nxb4 Ne2+ $1 (34... Rc3 $2 {(feared by SG)} 35. Qxc3 $3 {[#]} (35. Qh2 $2 Ne5 $1) (35. Qf4 $2 Qc8 $1) 35... Nf3+ (35... Ne2+ 36. Rxe2 Bxc3 37. Nd5 $1 Bg7 38. Rc2 $18) 36. Qxf3 exf3 37. Nd5 $1 (37. Bg5 $1) 37... Qb8 38. Rbc1 $1 Rc8 39. Rc7 $3 $18 {: ideal coordination}) (34... Re2 $3 {(a surprising resource, preparing ...Ne5-g4)} 35. Red1 Rxa2 $1 36. Rxd4 $8 Bxd4 37. Nxa2 Qf7 {and Blacks are rather better}) 35. Rxe2 Rxe2 36. Bc4 $1 Rd2 37. Nd5 $8 Bd4 $2 $138 { decisive mistake.} (37... Qc8 $1 38. Nb6 (38. Nc7 Bd4) 38... f4 $3 {[#]} (38... Nxb6 $2 39. Bf7 $18) (38... Qc5 39. Nxd7 {(Bf7 ...Ne5)} Qxc4 40. Rxb7 {(threatens mate by Nf6+! but follows a move "from elsewhere")} Rb8 $3 {[#](...Qc6! Rc7 ... Qxc7)} 41. Rxb8 {(Rc7? ...f4!! Qxf4 ...Qf1+!! Kh2 ...Rxf2! ; or Nxb8? ...Rd1+ then ...Qf1 or ...Qc1)} Rd1+ $8 42. Kh2 Qf1 $8 43. Qe3 Qg1+ $1 {(or ...f4!)} 44. Kh3 Rd3 45. Nf6+ Bxf6 46. Bxf6 Rxe3+ 47. fxe3 Qxe3+ $8 48. Kh2 $11 {but not g3? ...g5!! Bxg5 ...Qf3!}) (38... Be5 $4 39. Qg5 $8) 39. Qxf4 $8 (39. Qg5 $2 Nxb6 40. Bf7 Qf5 $19) 39... Nxb6 40. axb6 Rd4 $1 {(or ...Rxf2)} 41. Bb3 Qf5 $17) (37... Rd4 $1 38. Nc7 Qb8 39. Be6 (39. Ne6 Rxc4 40. Ng5+ Kh6 $8 {(...Kg8? Qb3)} 41. Nf7+ Kh7 $11) 39... Rd3 40. Qf4 $8 Ne5 (40... Bh6 41. Bg5 $8 $11) 41. Nxa6 (41. Qg5 Bh6 42. Qf6 $8 Bg7 $8 $11) (41. Nd5 Ng4 42. Qxf5 $1 {(but not Bxf5? ...Rxd5!)} gxf5 $11) 41... bxa6 (41... Qa7 42. Nb4) 42. Rxb8 Rd1+ (42... Rxb8 43. Bxf5 $8 gxf5 44. Qxf5+ Kg8 45. Qxh5 $8 Rd5 46. Qe2 {(or Bg5 ...Rxd6 Bf4)} Rb2 $1 47. Qxe4 Rd1+ 48. Kh2 Rxf2 49. Bg5 Rxd6 50. Kh3 $15) 43. Kh2 Ng4+ (43... Rxb8 44. Bxf5 gxf5 45. Qxf5+ Kg8 $8 46. Qxh5 $11) 44. Qxg4 $8 hxg4 45. Rb7 $8 e3 $3 {[#]} (45... Re8 $2 46. Bb3 $3 Rd2 {(...Be5+ g3)} 47. Bf6 $18) 46. fxe3 (46. Bf6 exf2) 46... Re8 $3 47. Bb3 (47. Bf6 Rxe6 48. Rxg7+ $8 Kh6 49. Rf7 $8 $11) (47. d7 Rxe7 48. d8=Q Rxd8 49. Rxe7 $11) 47... Be5+ $8 48. g3 Rd2+ $8 49. Kg1 Kh8 $8 50. Bc4 $1 Rc8 51. d7 $8 Rxc4 52. d8=Q+ Rxd8 53. Bxd8 Bxg3 54. Bf6+ Kg8 55. Rg7+ Kf8 56. Rxg6 $11) 38. Rxb7 $1 $18 Rg8 (38... Bxf2+ 39. Qxf2 Rxf2 40. Nf6+ $1 {SG}) (38... Qc8 39. Rc7 $8 Bxf2+ 40. Qxf2 Rxf2 41. Kxf2 $18) ( 38... Rxf2 39. Nf6+ $1 Bxf6 40. Bxf6 Rc2 41. Qb3 $18) (38... Rb2 39. Rc7 $8 Rc2 40. Qb3 $18) (38... Rc2 39. Bxa6 $1 (39. Rc7) 39... Qc8 40. Nf6+ (40. Bg5 $1) 40... Bxf6 41. Bxf6 Re8 42. Qb3 $18) 39. Nf6+ $1 Bxf6 40. Bxf6 Rd1+ (40... Rf8 41. Qe5 $1) 41. Kh2 (41. Kh2 Rg7 (41... Rf8 42. Qe5 $1 Qxe5+ 43. Bxe5 $18) ( 41... Rc1 42. Rxd7+ Qxd7 43. Bxg8+ Kxg8 44. Qxg6+ Kf8 45. Be7+) 42. Bxg7 Kxg7 43. Qc3+ $1 (43. Bxa6 $1 {(for Bb5) SG}) 43... Kh6 (43... Kh7 44. Qf6) 44. Bg8 $1 Qxg8 45. Rxd7 $18) 1-0 [Event "2#"] [Site "?"] [Date "1885.??.??"] [Round "?"] [White "Greenshields, EB."] [Black "1101.10"] [Result "1-0"] [SetUp "1"] [FEN "8/6K1/3k4/3N1P2/Q2R4/8/8/8 w - - 0 1"] [PlyCount "0"] [EventDate "1885.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "1962.??.??"] [Round "?"] [White "Giegold, F."] [Black "1434.01"] [Result "1-0"] [SetUp "1"] [FEN "8/8/2nrb3/2k5/4Q3/2Kp4/5N2/1R6 w - - 0 1"] [PlyCount "0"] [EventDate "1962.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "1962.??.??"] [Round "?"] [White "Fersedi, L."] [Black "1752.12"] [Result "1-0"] [SetUp "1"] [FEN "2B5/1p6/3r2rB/QN2p3/2P1k3/5N2/1b2KR2/8 w - - 0 1"] [PlyCount "0"] [EventDate "1962.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "2016.??.??"] [Round "?"] [White "Cramatte, J."] [Black "1888.16"] [Result "1-0"] [SetUp "1"] [FEN "3B1r2/3p1R2/2pr2n1/ppP1k1np/3R1N2/1B1QNp2/8/b2K3b w - - 0 1"] [PlyCount "0"] [EventDate "2016.01.22"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "1969.??.??"] [Round "?"] [White "Racz, E."] [Black "1485.23"] [Result "1-0"] [SetUp "1"] [FEN "KB1R2n1/1Q1p1r2/Bp2p3/8/2bkN3/3N4/2PP3b/8 w - - 0 1"] [PlyCount "0"] [EventDate "1969.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "2016.??.??"] [Round "?"] [White "Sovik, St"] [Black "1455.34"] [Result "1-0"] [SetUp "1"] [FEN "2B5/2p1Qbpr/3N2P1/4P1np/3P1k1N/4R2p/5B2/2K5 w - - 0 1"] [PlyCount "0"] [EventDate "2016.01.22"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "1994.??.??"] [Round "?"] [White "Saunders, D."] [Black "1858.22"] [Result "1-0"] [SetUp "1"] [FEN "1n1K4/N1B5/1pp2R2/3k4/1P1r4/3RbnN1/4P3/2Q2r1B w - - 0 1"] [PlyCount "0"] [EventDate "1994.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "1957.??.??"] [Round "?"] [White "Velicki, M & Samotugov E"] [Black "4752.22"] [Result "1-0"] [SetUp "1"] [FEN "BN3K2/8/R1r5/1Nrk1bBQ/2pP4/2p5/4P3/1q6 w - - 0 1"] [PlyCount "0"] [EventDate "1957.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "2# "] [Site "?"] [Date "1926.??.??"] [Round "?"] [White "Cristoffanini, G."] [Black "1558.32"] [Result "1-0"] [SetUp "1"] [FEN "2B1n3/1pP1r1p1/1P1n2K1/3k1N2/2RN3R/1P1b4/7B/3Q4 w - - 0 1"] [PlyCount "0"] [EventDate "1926.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "1964.??.??"] [Round "?"] [White "Raducanescu, D."] [Black "0885.30"] [Result "1-0"] [SetUp "1"] [FEN "2N3N1/4R3/4b1BK/3Pk3/rn6/B3P3/3r1P2/b1R5 w - - 0 1"] [PlyCount "0"] [EventDate "1964.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "2016.??.??"] [Round "?"] [White "Marandiuk, M."] [Black "4588.25"] [Result "1-0"] [SetUp "1"] [FEN "1n2R1K1/5pp1/3P4/R1N1BkbQ/2p2N2/3qPp1p/2B2n2/1r5b w - - 0 1"] [PlyCount "0"] [EventDate "2016.01.22"] [SourceDate "2000.07.25"] 1-0 [Event "2#"] [Site "?"] [Date "1931.??.??"] [Round "?"] [White "Howard, KS."] [Black "1578.14"] [Result "1-0"] [SetUp "1"] [FEN "B7/3p2p1/bR1n2Kp/4kn1R/5N1Q/b1P1N1p1/8/5r2 w - - 0 1"] [PlyCount "0"] [EventDate "1931.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "3#"] [Site "?"] [Date "1969.??.??"] [Round "?"] [White "Goumondy, Cl"] [Black "4888.28"] [Result "1-0"] [SetUp "1"] [FEN "1r2b2q/1RRPBNnp/p1P1B3/b4pN1/Kp1k1p2/p2p4/3Qp3/r3n3 w - - 0 1"] [PlyCount "5"] [EventDate "1969.??.??"] [SourceDate "2000.07.25"] 1. Bb3 $1 {(2 Qxf4+)} Rb1 (1... Bb6 2. Bf6+ Kc5 3. Qxb4#) (1... Bxc7 2. Qxb4+ Ke3 3. Bc5#) (1... Nh5 2. Bc5+ Kxc5 3. Ne6#) (1... Ne6 2. Nxe6+ Ke4 3. Qxf4#) ( 1... Nc2 2. Nf3+ Ke4 3. N7g5#) 2. Qxf4+ Kc3 3. Bf6# {AB-BC-CD-DE-EA. Four different escape squares out of five. Legal position (5 black captures, white promotion to g8). Published in "la Revue des Echecs" no 8.} 1-0 [Event "3#"] [Site "?"] [Date "1972.??.??"] [Round "?"] [White "Giegold, F."] [Black "1120.44"] [Result "1-0"] [SetUp "1"] [FEN "8/3p4/3pQ3/1B1p4/3k1P1p/P3R2P/1P5B/K7 w - - 0 1"] [PlyCount "0"] [EventDate "1972.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "3#"] [Site "?"] [Date "1927.??.??"] [Round "?"] [White "Scheel, J."] [Black "1032.01"] [Result "1-0"] [SetUp "1"] [FEN "8/8/1N6/k7/N7/8/4Q1p1/6Kb w - - 0 1"] [PlyCount "0"] [EventDate "1927.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "4#"] [Site "?"] [Date "1850.??.??"] [Round "?"] [White "Kling, J."] [Black "1335.02"] [Result "1-0"] [SetUp "1"] [FEN "Q7/8/p7/4Np2/4br2/8/4kn2/2K4N w - - 0 1"] [PlyCount "0"] [EventDate "1850.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "4#"] [Site "?"] [Date "1913.??.??"] [Round "?"] [White "Havel, M."] [Black "1005.23"] [Result "1-0"] [SetUp "1"] [FEN "8/8/nK1NN3/8/2p3p1/4Q2p/3PP3/4k3 w - - 0 1"] [PlyCount "0"] [EventDate "1913.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "4#"] [Site "?"] [Date "1958.??.??"] [Round "?"] [White "Reebehn, H."] [Black "1701.02"] [Result "1-0"] [SetUp "1"] [FEN "1r1r2k1/3R2pp/8/8/5N2/8/4Q3/7K w - - 0 1"] [PlyCount "0"] [EventDate "1958.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "4#"] [Site "?"] [Date "1861.??.??"] [Round "?"] [White "Cook, EB."] [Black "0101.31"] [Result "1-0"] [SetUp "1"] [FEN "6K1/7N/5R1p/7k/5P2/8/6PP/8 w - - 0 1"] [PlyCount "0"] [EventDate "1861.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "h#2 2 sol"] [Site "?"] [Date "1966.??.??"] [Round "?"] [White "Le Page, C."] [Black "3020.00"] [Result "1-0"] [SetUp "1"] [FEN "1B6/q7/2B5/8/5K2/8/8/6k1 b - - 0 1"] [PlyCount "0"] [EventDate "1966.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "h#3 3 sol"] [Site "?"] [Date "2017.??.??"] [Round "?"] [White "Schaffner, G."] [Black "3015.05"] [Result "1-0"] [SetUp "1"] [FEN "7K/8/5pp1/1p6/Np1p1k2/qB6/1N6/5n2 b - - 0 1"] [PlyCount "0"] [EventDate "2017.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "h#8 2 sol"] [Site "?"] [Date "2016.??.??"] [Round "?"] [White "Rimkus, M."] [Black "3031.01"] [Result "1-0"] [SetUp "1"] [FEN "K7/8/b7/2p5/8/6qk/8/7N b - - 0 1"] [PlyCount "0"] [EventDate "2016.??.??"] [SourceDate "2000.07.25"] 1-0 [Event "s#3"] [Site "?"] [Date "2015.??.??"] [Round "?"] [White "Zidek, A."] [Black "4874.37"] [Result "0-1"] [SetUp "1"] [FEN "1b6/p1N2B1b/5p2/q2p1krR/2PQ2RP/3p1Kpr/3p2Pp/5n2 w - - 0 1"] [PlyCount "0"] [EventDate "2015.??.??"] [SourceDate "2000.07.25"] 0-1 [Event "s#5"] [Site "?"] [Date "2015.??.??"] [Round "?"] [White "Paavilainen, J."] [Black "4285.66"] [Result "0-1"] [SetUp "1"] [FEN "b1NR1N2/2pnQ3/P4Rpq/KP1kp1P1/PB1pp3/3P3p/4P3/6bB w - - 0 1"] [PlyCount "10"] [EventDate "2015.??.??"] [SourceDate "2000.07.25"] 1. Bd2 $1 {(2 Qe6+)} Bb7 (1... c5 2. Qxe5+ $1 Kxe5 3. Bf4+ Kd5 4. Rf5+ $1 gxf5 5. Nb6+ Qxb6#) (1... c6 2. Rd6+ $1 Kc5 3. Rxd4+ $1 Kxd4 4. Qb4+ Kd5 5. Nb6+ Bxb6#) 2. Qe6+ $1 Kc5 3. Qc6+ $1 Bxc6 4. Bb4+ {Return.} Kd5 5. Nb6+ cxb6# { Three mates on the same square. The square b4 is vacant after the key, but is recovered in three different ways.} 0-1




"non-CB support diagrams" (animated fairy)




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