ch-Fr-2023
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.Evgeny Samotugov 1st Place Ukraine-BulgariaO Globo 1955
white Sd8h6 Rf7g5 Bd5e1 Pb7 Qc2 Kh1
black Sb8b5 Ph4b6e3 Kd6 Ra5b3 Bb2 Qa2
#2(9+10)
{}
1.Bd5-f3 ! {[5]} threat:
2.Rg5-d5 # {}
1...Bb2-e5
2.Sh6-f5 # {}
1...Rb3-a3
2.Be1-b4 # {}
1...Rb3-b4
2.Be1*b4 # {}
1...Rb3-d3
2.Be1-b4 # {}
1...Rb3-c3
2.Qc2-h2 # {}
1...Sb5-a3
2.Qc2-c7 # {}
1...Sb5-c3
2.Qc2-g6 # {}
1...Sb5-d4
2.Qc2-c7 # {}
1...Sb5-c7
2.Qc2*c7 # {}
1...Sb5-a7
2.Qc2-c7 #
2
Give the key.G. Arnaud Comte de Savignac-Castelet1st Prize Bulletin FFE 1928
white Bc7 Re7b5 Se8f8 Qh6 Ph5e6c3c4 Kd1
black Rd8d6 Sb7 Bg8c5 Ph7f6f5e4d2 Ke5
#2(11+11)
{}
1.Qh6*d2 ! {[5]} zugzwang. {}
1...e4-e3
2.Qd2-d4 # {}
1...f5-f4
2.Qd2-d5 # {}
1...Sb7-a5
2.Rb5*c5 # {}
1...h7-h6
2.Sf8-g6 # {}
1...Rd8-d7
2.Sf8*d7 # {}
1...Rd8-a8
2.Sf8-d7 # {}
1...Rd8-b8
2.Sf8-d7 # {}
1...Rd8-c8
2.Sf8-d7 # {}
1...Rd8*e8
2.Sf8-d7 # {}
1...Bg8*e6
2.Re7*e6 # {}
1...Bg8-f7
2.e6*f7 #
3
Give key, threats and variations up to the mate.Virgil Nestorescu11th place WCCT 1,Chess Magazine 1972 (version)
white Ka8 Re7 Se6d4 Bf5g3 Pb3 Qb4
black Bd8a4 Pg5b5b6d6 Qg2 Sf2e5 Rd1c1 Kd5
#3(8+12)
{}
1.Sd4-c6 ! threat:
2.Qb4*b5 + {[.5]}
2...Rc1-c5
3.Sc6-b4 #
2...Ba4*b5
3.Sc6-b4 # {}
1...Rc1-a1
2.Qb4-c4 + {[.5]}
2...b5*c4
3.Sc6-b4 #
2...Se5*c4
3.Sc6-b4 # {}
1...Rc1*c6
2.Se6-f4 + {[.5]}
2...g5*f4
3.Bf5-e6 # {}
1...Rc1-c5
2.Qb4-d2 + {[.5]}
2...Rd1*d2
3.Sc6-b4 #
2...Sf2-d3
3.Sc6-b4 #
2...Kd5*c6
3.Se6*d8 #
2...Se5-d3
3.Sc6-b4 # {}
1...Rc1-c4
2.Qb4*c4 + {[.5]}
2...b5*c4
3.Sc6-b4 #
2...Se5*c4
3.Sc6-b4 # {}
1...Rd1-d4
2.Qb4*d4 + {[.5]}
2...Kd5*c6
3.Se6*d8 # {}
1...Sf2-d3
2.Qb4-d4 + {[.5]}
2...Kd5*c6
3.Se6*d8 # {}
1...Qg2-f1
2.Qb4-e4 + {[.5]}
2...Sf2*e4
3.Sc6-b4 # {}
1...Qg2-e4
2.Qb4*e4 + {[.5]}
2...Sf2*e4
3.Sc6-b4 # {}
1...Kd5*c6
2.Se6*d8 + {[.5]}
2...Kc6-d5
3.Bf5-e6 #
4
Give key, threats and variations up to the mate.Michael Keller Prize Jean Morice 60 JT, 1991 (version)
white Bc8f2 Pe6c6g2e3f4 Se5g4 Rf6h5 Qc4 Kh8
black Ba7 Pa6e7h6d4b4e2 Ke4 Sc3c1 Ra2
#3(13+12)
{ }
1.Bc8-d7 ! threat:
2.Bd7-e8 {[1.25]} threat:
3.Be8-g6 #
2...e7*f6
3.Sg4*f6 # {}
1...Sc3-d1
2.Se5-f3 {[1.25]} threat:
3.Rh5-e5 #
2...Sc1-d3
3.Qc4-d5 #
2...Ra2-a5
3.Sf3-d2 #
2...Ba7-b8
3.Qc4*d4 #
2...e7*f6
3.Sg4*f6 # {}
1...Sc3-d5
2.Se5-f7 {[1.25]} threat:
3.Rh5-e5 #
2...Sc1-d3
3.Qc4*d5 #
2...Ba7-b8
3.Qc4*d4 #
2...e7*f6
3.Sf7-d6 # {}
1...Sc3-b5
2.Se5-d3 {[1.25]} threat:
3.Rh5-e5 #
2...Sc1*d3
3.Qc4-d5 #
2...Ba7-b8
3.Sd3-c5 #
2...e7*f6
3.Sg4*f6 #
5
Give the solution up to the white move preceding mate.Charles William Benbow Dubuque Chess Journal 1873
white Pb6b2e3d4f4g6h4 Bb4d7 Ka1 Sg2e5
black Pb7b5b3a2g7h5 Ba6 Ke4
#6(12+8)
{
} 1.Bd7-c8 ! zugzwang. 1...Ke4-d5 2.Bc8-h3 zugzwang. 2...Kd5-e4 3.f4-f5 zugzwang. 3...Ke4-d5 4.Sg2-f4 + 4...Kd5-e4 5.Sf4-d5 {[5]} zugzwang. 5...Ke4*d5 6.Bh3-g2 #
} 1.Bd7-c8 ! zugzwang. 1...Ke4-d5 2.Bc8-h3 zugzwang. 2...Kd5-e4 3.f4-f5 zugzwang. 3...Ke4-d5 4.Sg2-f4 + 4...Kd5-e4 5.Sf4-d5 {[5]} zugzwang. 5...Ke4*d5 6.Bh3-g2 #
6
Give the main line to the very endDavid Gurgenidze 6th Prize, Galitzky MT 1993
white Ke6 Pe7g7 Sh7 Ra1
black Rb8h5 Sc4 Kg6
+(5+4)
{}
1.g7-g8=Q + Rb8*g8 2.Sh7-f8 + Kg6-g7 3.Ra1-g1 + {[1]}
Kg7-h8 {} 4.e7-e8=Q Rh5-e5 + 5.Ke6-f6 {[1]}
Re5-f5 + 6.Kf6*f5 Sc4-d6 + {} 7.Kf5-e6 {[1]}
Sd6*e8 8.Rg1-h1 + Kh8-g7 9.Rh1-h7 + {[1]}
Kg7*f8 10.Rh7-f7 #
7
Give complete solutionsIosif Krikheli 1 Commendation, Israel Ring Tourney 1975
white Sc8 Pd4 Kc4 Ba2
black Sg7 Pg6a6a5b4a3 Kf6 Rb5a4 Bc2
h#3(4+10)b) g6-->e7
{ }
a) {}
1.Rb5-h5 Sc8-e7 2.Bc2-f5 Kc4-c5 3.Rh5-g5 Se7-g8 # {[2.5]}
b) bPg6-->e7 {pg6-e7}
1.Bc2-h7 Sc8-d6 2.Rb5-f5 Kc4-d3 3.Bh7-g6 Sd6-e4 # {[2.5]}
8
Give complete solutions.Steven B. Dowd, Marko Ylijoki & Mirko Degenkolbe 1st Prize Israel Ring Tourney 2006
white Pb6b5b4b3a2g2 Ra3 Ba5 Kh1
black Pb7d3e4g3h2 Kf4
h#7 2sol.(9+6)
{
} 1.d3-d2 Ra3-a4 2.d2-d1=B Ra4-a3 3.Bd1-e2 Ra3-a4 {} 4.Be2*b5 a2-a3 5.Bb5-f1 b4-b5 6.Kf4-e3 Ra4*e4 + 7.Ke3-f2 Ba5-e1 # {[2.5]} 1.e4-e3 Ra3-a4 2.e3-e2 Ra4-a3 3.e2-e1=B Ra3-a4 {} 4.Be1*b4 Ba5*b4 5.Kf4-e3 Bb4-a3 6.Ke3-d2 Ba3-c1 + 7.Kd2-c3 Ra4-c4 # {[2.5]}
} 1.d3-d2 Ra3-a4 2.d2-d1=B Ra4-a3 3.Bd1-e2 Ra3-a4 {} 4.Be2*b5 a2-a3 5.Bb5-f1 b4-b5 6.Kf4-e3 Ra4*e4 + 7.Ke3-f2 Ba5-e1 # {[2.5]} 1.e4-e3 Ra3-a4 2.e3-e2 Ra4-a3 3.e2-e1=B Ra3-a4 {} 4.Be1*b4 Ba5*b4 5.Kf4-e3 Bb4-a3 6.Ke3-d2 Ba3-c1 + 7.Kd2-c3 Ra4-c4 # {[2.5]}
9
Give the key and variations up to the mate.Jean-Pierre Boyer 2nd Place, French Championships 1984
white Rd7f5 Pe4c2b3 Qh4 Bg2b6 Kf1 Sd1b1
black Pf2g3c3c5b7 Sh1b5 Re2c4 Kd4 Ba6d6
s#3(11+12)
{}
1.Rf5-g5 ! zugzwang.
1...Re2*c2
2.Qh4-h8 +
2...Kd4-d3
3.Rg5*g3 + {[1.25]}
3...Sh1*g3 # {}
1...Re2-d2 {(ou aiileurs)}
2.Rd7*d6 +
2...Sb5*d6
3.Bb6*c5 + {[1.25]}
3...Rc4*c5 # {}
1...Rc4-a4 {(ou aiileurs)}
2.e4-e5 +
2...Re2-e4
3.Rd7*d6 + {[1.25]}
3...Sb5*d6 # {}
1...Sb5-a3 {(ou aiileurs)}
2.Bb6*c5 +
2...Rc4*c5
3.e4-e5 + {[1.25]}
3...Re2-e4 #
10
Give the key and variations up to the mate.Frank Richter Prize harmonie 1992-94
white Pe2c3d5 Se1 Bb4 Qa4 Ra5c1 Ka1
black Pg6h4f4d3a6a3a2 Qh5 Bf3 Kc4
s#4(9+10)
{ }
1.Rc1-d1 ! threat:
2.Qa4-c6 +
2...Kc4-b3
3.Rd1-d2 threat:
4.Rd2-b2 + {[1.5]}
4...a3*b2 # {}
1...Bf3*d5
2.Bb4-d6 +
2...Kc4*c3
3.Bd6-e5 +
3...Qh5*e5
4.Qa4-b4 + {[2]}
4...Kc3*b4 # {}
1...Qh5*d5
2.Bb4-c5 +
2...Kc4*c3
3.Bc5-d4 +
3...Qd5*d4
4.Qa4-b3 + {[1.5]}
4...Kc3*b3 #
11
Give the key jusqu'au coup blanc qui précède le matSemion Shiffrin HM1 A Mikholap 35JT, 2005-06
white Sc7 Bb8g8 LIg7h4e3 Pf2e2d2e5b6 RLc1 Ka1
black BLd8 Pc6b5a5d3g6 Kc5 Bd1 LIf5
#2(13+9)
g7, h4, e3, f5: Lion
c1: Rook-Lion
d8: Bishop-Lion
{
Try :} 1.LIe3-e1 ? threat: 2.LIg7-g1 # {} 1...Kc5*b6 2.Bb8-a7 # {} 1...BLd8*b6 2.Sc7-a6 # {but} 1...LIf5-d5 ! {} 1.LIg7-g1 ! {[5]} threat: 2.LIe3-e1 # {} 1...Kc5-b4 2.f2-f4 # {} 1...Kc5*b6 2.LIe3-b3 # {} 1...LIf5-d5 2.f2-f4 # {} 1...BLd8*b6 2.LIe3*b6 #
Try :} 1.LIe3-e1 ? threat: 2.LIg7-g1 # {} 1...Kc5*b6 2.Bb8-a7 # {} 1...BLd8*b6 2.Sc7-a6 # {but} 1...LIf5-d5 ! {} 1.LIg7-g1 ! {[5]} threat: 2.LIe3-e1 # {} 1...Kc5-b4 2.f2-f4 # {} 1...Kc5*b6 2.LIe3-b3 # {} 1...LIf5-d5 2.f2-f4 # {} 1...BLd8*b6 2.LIe3*b6 #
12
Give complete solutions.Michal Dragoun 6 Comm feenschach 2018
white Kf6 LIe7f4 Pe3
black BLf8d3c3 RLh4c6 Pb6b5b3b2a2g6 Sa5 Kb4
h#2 4sol.(4+14)
e7, f4: Lion
f8, d3, c3: Bishop-Lion
h4, c6: Rook-Lion
{}
1.Kb4-a3 Kf6-f7 2.RLh4-a4 LIf4*f8 # {[1.25]}
1.Kb4-c5 LIe7-g5 2.RLh4-c4 Kf6-e5 # {[1.25]}
1.Kb4-a4 Kf6-g5 2.BLf8-a3 LIe7*h4 # {[1.25]}
1.Kb4-c4 LIf4-f7 2.BLf8-c5 Kf6-e6 # {[1.25]}
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