ch-Fr-B-2020
Click in the right part of the chessboard to move forward, left to move backward... or directly on the move
150mn
1
Give the key.Rauf AliovsadzadeProblemesis 2005
white Ba2b4 Kd7 Qg5 Pb2 Sf3f5 Rb3d2
black Pe7f6c6b5 Sd8e2 Re8 Kc4 Ba7
#2(9+9)
{Tries}
1.Qg5*f6 ? {(menace}
2.Sf3-e5 # {)} 1...Ba7-d4 ! {}
1.Bb4-d6 ? 1...Ba7-c5 ! {}
1.Sf3-d4 ? {(threatens}
2.Sf5-e3 # {)}
1...Ba7*d4 ! {}
1.Rd2-d6 !
{ 5p (menace}
2.Sf3-d2 # {)}
1...Ba7-e3
2.Sf5*e3 # {}
1...e7*d6
2.Sf5*d6 #
2
Give the key.Herbert Ahues1st PrizeArbeijder-Skak 1960
white Qd5 Kh4 Rh6d3 Sf3c4 Bb2b1
black Kf5 Pf7f6g4f4e5d6 Re4b4 Bh1a5 Sb5
#2(8+12)
{}
1.Sc4*e5 ! {display-departure-file} { 5p (menace)} 2.Rh6-h5 # {}
1...Re4*e5
2.Rd3-d4 # {}
1...d6*e5
2.Qd5-d7 # {}
1...f6*e5
2.Qd5*f7 # {}
1.Bb2*e5 ? {(} 2.Rh6*f6 # {)}
1...Re4*e5
2.Rd3-b3 # {mais}
1...Ba5-d8 !
1.Sf3*e5 ? {(} 2.Rh6-h5 # {)}
1...Re4*e5
2.Rd3-f3 # {mais}
1...f4-f3 !
3
Give the key, threats and variations. until the white move that precedes checkmate.Nikolay Malakhov, 1st Prize, Shakhmatny Listok 1925
white Qh4 Pf7e6c4a3e2f3 Ke7 Rd6 Sd4
black Pc6b6a4f4f5 Kc5 Bh7h2 Sf1
#3(10+9)
{}
1.Ke7-f8 ! {(} 2.Qh4-d8 3.Rd6*c6 # {) 1p (blocus) }
1...Sf1-e3
2.Rd6*c6 + { 1p}
2...Kc5*d4
3.Qh4-f6 # {}
1...Bh2-g1
2.Qh4*f4 { 1p} threat:
3.Rd6*c6 #
2...Bg1*d4
3.Qf4*d4 #
2...Kc5*c4
3.Qf4-c1 # {}
1...Kc5*d6
2.Qh4-e7 + { 1p}
2...Kd6-e5
3.Sd4*c6 # {}
1...Kc5*c4
2.Qh4-e1 { 1p (menace} threat:
3.Qe1-b4 #
3.Qe1-c1 # {)}
2...Sf1-e3
3.Qe1-b4 #
2...Sf1-d2
3.Qe1-c1 #
2...Kc4-c5
3.Qe1-b4 #
2...c6-c5
3.Qe1-c1 #
4
Give the key, threats and variations. until the white move that precedes checkmate.Peter R. Jaeger, 1st Honor Mention, Neue Zürcher Zeitung 1983
white Bc4h2 Kh7 Qh8 Pe3 Sd5c6 Rf6
black Pa2b3c2h6g6 Ke4 Rg3 Sc7f1 Bg5
#3(8+10)
{ }
1.Sc6-d4 ! threat:
2.Qh8-e8 +
2...Sc7-e6
3.Qe8*e6 #
3.Rf6*e6 #
2...Sc7*e8
3.Rf6-e6 #
{ 1p}
1...Rg3*e3
2.Rf6-e6 + { 1p}
2...Sc7*e6
3.Qh8-e5 # {}
1...Bg5*e3
2.Sd5-c3 + { 1p}
2...Ke4-e5
3.Sd4-f3 #
3.Sd4-c6 #
2...Ke4*d4
3.Rf6-c6 # {}
1...Sf1*e3
2.Rf6-f4 + { 1p}
2...Bg5*f4
3.Sd5-c3 # {}
1...Bg5*f6
2.Qh8*f6 {(} 3.Qf6-f4 # {) 1p}
2...Rg3-f3
3.Qf6-e5 #
3.Qf6*f3 #
2...Rg3-g4
3.Qf6-e5 #
3.Qf6-f3 #
2...g6-g5
3.Qf6-f5 #
2...Sc7*d5
3.Qf6-e6 #
2...Sc7-e6
3.Qf6*e6 #
5
Give the solution up to the white move that precedes checkmate.Fritz Giegold2nd Honor MentionDeutsche Schachblätter 1966
white Pa4f4f3 Sb6e2 Bc7 Kd6
black Pb7a6a5e5 Ka7
#4(7+5)
{
} 1.Se2-g3 ! { 2p(blocus)} 1...e5-e4 2.Sg3-f5 {(menace} 3.Sf5-e7 threat: 4.Se7-c8 # {) 1,5p} 1...e5*f4 2.Kd6-d7 threat: 3.Bc7*f4 zugzwang. 3...Ka7*b6 4.Bf4-e3 # 2...f4*g3 3.Bc7*g3 { 1,5p} 3...Ka7*b6 4.Bg3-f2 #
} 1.Se2-g3 ! { 2p(blocus)} 1...e5-e4 2.Sg3-f5 {(menace} 3.Sf5-e7 threat: 4.Se7-c8 # {) 1,5p} 1...e5*f4 2.Kd6-d7 threat: 3.Bc7*f4 zugzwang. 3...Ka7*b6 4.Bf4-e3 # 2...f4*g3 3.Bc7*g3 { 1,5p} 3...Ka7*b6 4.Bg3-f2 #
6
Give the solution up to the white move that precedes checkmate.Josef BreuerDie Schwalbe1937
white Rb2 Kd1 Bh8
black Ka1 Pd7f5f4f2d2b3a2 Sh2 Rh4 Be1
#6(3+11)
{}
1.Bh8-g7 ! {(} 2.Rb2*b3 # { 1p}
1...Rh4-g4
2.Bg7-e5 {(}
3.Rb2*b3 # { 1p}
2...d7-d6
3.Be5-f6 {(}
4.Rb2*b3 # { 1p}
3...Rg4-g6
4.Bf6-d4 {(}
5.Rb2*b3 # { 1p}
4...Sh2-f3
5.Bd4-c3 {(}
6.Rb2*b3 # { 1p}
7
Give main variation.T. Gorgiev3rd Honor Mentiontm05#188 1928
white Sh3 Pb5c4 Kf4 Rd2 Bh6
black Pc6f5 Kc7 Rd6 Sc3 Bh4
+(6+6)
{ }
1.b5-b6 + { 1p}
1...Kc7*b6 2.Rd2*d6 Bh4-g3 + 3.Kf4*g3 Sc3-e4 + 4.Kg3-f3 ! { 2p}
4...Se4*d6 5.c4-c5 + { 1p}
5...Kb6*c5 6.Bh6-f8 Kc5-d5 7.Sh3-f4 + Kd5-e5 {(i)} 8.Bf8-g7 # { 1p(i)} 7...Kd5-c5 8.Kf3-e3 {+-}
8
Give main variation.Julio Peris Pardo & Francisco Quesada, 1st -2nd HM1943-44
white Sh6 Rg8 Ke2
black Ph2 Sd8f7 Kh7
=(3+4)
{
} 1.Sh6-g4 ! { 1p} 1...h2-h1=Q 2.Sg4-f6 + Kh7-h6 3.Sf6-g4 + Kh6-h5 4.Sg4-f6 + Kh5-h4 5.Rg8-g4 + Kh4-h3 6.Sf6-e4 { 2p} 6...Qh1-a1 {(} 6...Qh1-b1 {/} 6...Qh1-c1 {)} 7.Se4-f2 + Kh3-h2 8.Rg4-h4 + Kh2-g3 9.Rh4-g4 + {= 2p}
} 1.Sh6-g4 ! { 1p} 1...h2-h1=Q 2.Sg4-f6 + Kh7-h6 3.Sf6-g4 + Kh6-h5 4.Sg4-f6 + Kh5-h4 5.Rg8-g4 + Kh4-h3 6.Sf6-e4 { 2p} 6...Qh1-a1 {(} 6...Qh1-b1 {/} 6...Qh1-c1 {)} 7.Se4-f2 + Kh3-h2 8.Rg4-h4 + Kh2-g3 9.Rh4-g4 + {= 2p}
9
Giving the key, threats and variations. until the white move that precedes checkmate.Viktor Chepizhnyi3rd Prizediagrammes 1999
white Bb1a7 Kc4 Qc3 Pd6 Sd3b7 Re8f6
black Bb4f1 Ke4 Qa4 Pc6a5b3 Sf7e6 Ra3c2
s#2(9+11)
{}
1.Ba7-f2 ! {(}
2.Sb7-c5 +
2...Bb4*c5 # {) 1p}
1...Bf1-h3 {(} 1...Bf1-g2 {)}
2.Sd3-c5 + { 1p}
2...Bb4*c5 # {}
1...Rc2-a2 {/}
1...Rc2-b2 {/}
1...Rc2*f2 {/}
1...Rc2-d2
2.Qc3-e5 + { 1p}
2...Sf7*e5 # {}
1...Rc2-e2
2.Sd3*b4 + { 1p}
2...Re2-c2 # {}
1...Sf7*d6 +
2.Sb7*d6 + { 1p}
2...Bb4*d6 #
10
Give full variations.Petko A. Petkov1st PrizeSchach-Echo 1970-II
white Qh4 Pg3c3c5 Kf4 Rh6g5 Bf3e3
black Bd1a7 Kb5 Qb2 Pg2e2a5c7 Sa4 Rf2
h#2 2sol.(9+10)
{ }
1.Sa4*c5 Kf4-e5 2.Sc5-a6 Bf3-c6 # { 2,5p}
1.Ba7*c5 Kf4-f5 2.Bc5-b4 c3-c4 # { 2,5p}
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