april 23 2013

Spring was here, but the absent listeners were probably absorbed this time, not by some strike, but rather by a television match.
Nevertheless, the core group remained, and one active member joined in during the day's play.
Let's hope that the next session will have a bigger audience.

To begin with, let's look back at the exercises submitted the last time.

1 - exercise 1 from the previous session: white to play and draw
W : Kd8 Rb6 Nb1
B : Ka2 Qç5
= (3+2)
1 Rb7 ! (1 Rb8? Qd6+ 2 Kc8 Qc6+ 3 Kd8 Ka1) Qc6 2 Rb5! Ka1 3 Rb8 ! (now, it's correct) Ka2 4 Rb5 draw
on 3 ... Qd6+ 4 Kc8 Qc6+ 5 Kd8 Black is forced to play Ka2 and Rb5 becomes good again

Not bad at all ?

2 - exercise 2 from the previous session: white to play and win


An "aristocratic" 2# helpmate (without pawns) which, according to Ch. Feather, "appealed more to the solvers than to the judge", so my kind of problem. Then a minimal aidé 3# from an unknown Frenchman (from Toulon): a discovery. As for the 4# helpmate, it was given at the last English championship, won by a Scotsman. One of the solutions took me much longer, although it is perfectly related to the first. 
A 2# from another Frenchman, this one from Nice. A kind of record. Another 2# from the great Marjan. I hear it's called the Sushkov theme, and a cyclic one at that! But you don't need to know that to appreciate it. A 3# (very cute) from a Mulhousian to please Marc, who doesn't deserve it though, as he didn't come back to the course. Another 3# from the same league across the Channel. 
In the multi-moves, it's time for the German-speaking part; none of them are difficult, only the 4# can be a bit surprising. And a rather difficult selfmate, but with only black pawns, so rather pleasant to search for (we'll spare the Gamnitzer this time). 
 Dobrescu 3A Dobrescu rescue (Rook and Knight against Queen) with a column sweep. 

A Rook does not usually win against a Bishop alone. Nor against a Knight alone. How could it win against Bishop + Knight, when neither of these two figures is in the grip? A mystery. But in St-Lazare, we explain everything! 
Afek doesn't like tablebased studies, at least that's what he wrote to me when he rejected one of my studies for "The Problemist". But he is yet another adherent of the adage "Do as I say, not as I do". This allowed him, as the judges were not resentful, to win a 2nd prize at the "Botvinnik Memorial" with Karpov kasparov 4a R + 2P / R (table-based material since 2006). 
A world championship game rehabilitating (?) the opening of the famous Botvinnik-Fischer, which caused trouble in 1962 in the Gulag paradise. 
See you in three weeks, on Tuesday 14 May. May God keep you. 
Have a good time.

W : Kç8 Rb3
B : Ka8 Ba4 Nç7
+ (2+3)
1 Rb6! (threatens Kxc7)  Nb5 2 Ra6+ Na7+ 3 Kc7 Be8 (Bishop must remain on this diagonal to be able to play Nb5 or NC6 after Rb6) 4 Ra3 !!
4 Ra1? Bg6!
4 Ra2? Ba4!
4 ... Ba4 5 Ra2 (reciprocal zugzwang) and here several branches that I let you shake
5 ... Bb3
5 ... Nb5+
5 ... Be8
5 ... Bd1 which remains the longest variation

The following position is an end of a study by Afek
3 - White to play and draw
Yochanan AFEK
W : Ké4 Rd6 Pd5
B : Ka5 Rf5 Nh6 Pf7g7
= (3+5)
(Note the slightly more crowded starting position: White: Ke4, Re7, pa6, b7, d5 and d6 Black: Ka7, Rf5 and f6, Ng8, pf7 and g7)

And now, the exercise for next session which will be held in just under 3 weeks time on 14 May
4 - exercise : White to play and draw
W : Kf1 Qb8 Rd5
B : Kh1 Qa1 Bé1 Pf3

It doesn't smell too good for white, but there is surely the move that ends the multiple dangers of the position

5 - Game of the day K - K
1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3
russian variation
5 ,,, dc 6 Qxc4 0-0 7 e4 Bg4 8 Be3 Nfd7 9 Rd1 Nc6 10 Be2 Nb6 11 Qc5 Qd6 12 e5
12 Qxd6 Nb5 d5 0-0 and finally h3 with the famous Botvinnik - Fischer game : Bxf3 13 gf Rfd8 14
d5 Ne5 15 Nb5 Qf6 16 f4 Nd7 17 e5 Qxf4 ! And if 18 Qxb6 ?? Qe4 ! 19 f3 Qh4+ and Qb4+
12 ... Qxc5 13 dc Nc8
13 ,,, Nd7 ! 14 h3 Be6 15 Ng5 Ndxe5 16 Nxe6 (16 f4 Nc4 17 Bc1 Na3) fe 17 f4 Nf7 18 Bc4 e5
19 0-0 ef 20 Bxf4 Rac8 21 Be1 Rcd8 22 Bxc7 (22 Rxd8 Ncxd8) Rxd1 23 Rxd1 and Black plays
Kg7 and Nfd8
A bit tight but quite playable !
14 h3 Bxf3 15 Bxf3 Bxe5 16 Bxc6 bc 17 Bd4 Bf4 18 0-0 a5 ?
18 ... e5 19 Be3 Bxe3 20 fe Ne7 21 Rd7 Nf5 22 Rxc7 Rfc8 23 Rd7 Rd8 24 Rfd1 Rxd7 25 Rxd7 Nxe3 26 Rc7 Rb8! 27 b3 Rd8 K - Timman
19 Rfe1 a4 ?! 20 Re4 Bh6 21 Be5 a3 22 b3 Na7 23 Rd7 Bc1
A scam attempt
24 Rxc7 Bb2 25 Na4 Nb5 26 Rxc6!
pc5 now has a clear path
26 ... Rfd8 27 Rb6 Rd5
A sweeper trap
28 Bg3! Nc3 29 Nxc3 Bxc3 30 c6 Bd4 31 Rb7 resigns

To attack the aperitif, we discover the gnu which is an incestuous crossing between the Knight and the Camel

6 - h#2 with Gnu and twin
W : Ké5 Gnh6
B : Kç3 Rh4 Bg8 Pd3b2ç2
h‡2 (2+6)
Gn=Gnu : Knight (1+2) or Camel (1,3)

Check out this problem, it's very accessible

A Frenchman tackling a genre with an English name is worth noting.
7 - h#2 Take&Make 2 solutions
W : Kç8 Ba7 Ng1 Pd5
B : Kd6 Rh7 Pf7
h‡2 (4+3)
Take & Make :

a capture must necessarily be followed by a move without capture of the capturing piece adopting the step of the captured piece

Small indication: the f7-pawn is an anti-demolition since it cannot be taken at Make

And for the digestive, a Peter Harris
8 - h#4,5 with twin Köko Circé
W : Qg6
B : Kh2 Pb2
h‡4,5 (1+2)
Köko : at the end of a move, a piece must be in contact with another
Circé : a captured piece is reborn on its original square

Pure Harris. He must be in his eighties and you can feel that he is still full of imagination.
An example to us all! Hats off to Mr Harris.

We look forward to seeing you on 14 May.
The electronic and more complete report of the Master, is of course below. Thanks to him.

Good reading
Yours sincerely

le greffier 

short hair

Thanks to the Master Clerk for his almost immaculate account.
At the start of Afek's study, the wP is on a5 (not a6). But the interesting phase is from the diagram.
On 13...Nd7, important to note is also 14...Bxf3 15 gxf3 Rad8 16 f4 g5!
In the given continuation, read of course 21 Be6; further on, Black first plays 23...Bd4+.

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