ch-Fr-2022
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.José Luís Monteiro da Silveira, 2ème Prix Francisco V. Agarez M. T. O Globo 1960
white Kc8 Rd8e2 Ba7 Ph7c4g3g4 Sd4g1 Qc2
black Pc6b2e4e7f6 Bc5 Ke5 Qb1 Re1 Sh2
#2(11+10)
{}
1.Kc8-d7 ! { 5p (threatens}
2.Sd4*c6 # {)}
1...Qb1-d1
2.Qc2*e4 # {}
1...Re1-d1
2.Re2*e4 # {}
1...Sh2*g4
2.Sg1-f3 # {}
1...Bc5*d4
2.Ba7-b8 # {}
1...Ke5*d4
2.Kd7-e6 # {}
1...f6-f5
2.h7-h8=Q #
2.h7-h8=B #
2
Give the key.Norman A. MacleodThe Independent 1988
white Ba1b1 Sd4d6 Kh7 Re8f1 Pe3h3
black Pa3b4b3d7h6 Kf6 Rh5 Sf5
#2(9+8)
{Essai}
1.h3-h4 ? {(threatens} 2.Sd4*b3 # {)}
1...b3-b2 !
{}
1.Bb1-a2 ! { 5p (blocus)}
1...b3-b2
2.Sd6-e4 # {}
1...b3*a2
2.Sd4-e6 # {}
1...Rh5*h3
2.Rf1*f5 # {}
1...Rh5-h4
2.Rf1*f5 # {}
1...Rh5-g5
2.Sd4*b3 # {}
1...Kf6-g5
2.Sd4-f3 #
3
Give the key and variations jusqu’au mat.Johan Scheel 1ère MH, The British Chess Magazine 1925
white Bh6 Kd8 Se5b3 Pd2 Qf2
black Sg6 Pd7 Ke4
#3(6+3)
{}
1.Qf2-f7 ! {(blocus) 0.8p } 1...Sg6-h4 {or} 1...Sg6-h8 {or}
1...Sg6-h8 {or} 1...Sg6-e7
2.d2-d3 +
2...Ke4*e5
3.Bh6-f4 # { 0.7p }
1...Sg6*e5
2.Sb3-c5 +
2...Ke4-d4
3.Bh6-e3 #
{ 0.7p}
1...Sg6-f4
2.Bh6*f4 {threatens}
3.d2-d3 #
{ 0.7p}
1...Ke4*e5
2.Bh6-g7 +
2...Ke5-d6
3.Qf7*d7 # {or}
2...Ke5-e4
3.Sb3-c5 #
{ 0.7p}
1...d7-d5
2.Qf7*g6 +
2...Ke4*e5
3.d2-d4 # { 0.7p}
1...d7-d6
2.d2-d3 +
2...Ke4*e5
3.Bh6-g7 # { 0.7p}
4
Give the key, the threat and variations jusqu’au mat.Roger Diot1st-2nd Prize e.a. 101 T.T. Probleemblad 1957
white Qg6 Kb6 Sb4h2 Bc1 Pf5 Rg4
black Bc8f8 Pg7c6c4c2h4 Sd6d4 Ke5
#3(7+10)
{ Try}
1.Bc1-e3 ? {}
1...Sd6*f5
2.Be3*d4 +
2...Sf5*d4
3.Rg4-e4 # {}
1...c6-c5
2.Be3*d4 +
2...c5*d4
3.Sh2-f3 #
{but} 1...Sd6-b5 ! {}
1.Sh2-f1 ! {(threatens} 2.Bc1-f4 + Ke5-e4 3.Sf1-d2 #
{) 1.25p}
1...Sd4-b3 {or} 1...Sd4-e2 {or} 1...Sd4-f3 {or} 1...Sd4-e6
{or} 1...Sd4-b5
2.Sb4*c6 +
2...Ke5-d5
3.Sf1-e3 #
{ 1.25p}
1...Sd4*f5
2.Sf1-h2 threat:
3.Sh2-f3 #
2...Sf5-d4
3.Bc1-f4 #
{ 1.25p}
1...c4-c3
2.Sb4-d3 +
2...Ke5-d5
3.Sf1-e3 #
{ 1.25p}
5
Give complete solutionMarcel Tribowski1st Comm. Schach-Aktiv 2002
white Ba8 Sg8a4 Pg6e6g3h2e2d3b2 Rd6h4 Qe1 Ka1
black Ra7b8 Sf8g4 Pg7f5a5b4c5 Ke3
#4(14+10)
{
tries} 1.Ba8-f3 ? {(threatens} 2.Qe1-g1 + 2...Ke3-d2 3.Ka1-b1 threat: 4.Qg1-c1 # {) but } 1...Sg4-e5 ! {} 1.Ba8-b7 ? {(threatens} 2.Sa4-b6 2...Sg4-e5 3.Sb6-d5 # {or} 2.Sg8-e7 2...Sg4-h6 3.Se7-d5 # {) but} 1...Sf8-d7 ! {} 1.Ka1-b1 ! {(threatens} 2.Ba8-f3 {followed by} 3.Qe1-g1 + { 1.25p} 3...Ke3-d2 4.Qg1-c1 # 3...Sg4-f2 4.Qg1-c1 # {)} 1...Ra7-b7 2.Sa4-b6 threat: 3.Sb6-c4 # 2...Sg4-e5 3.Sb6-d5 # 2...Rb7*b6 3.Sg8-e7 { 1.25p} 4.Se7*f5 # 3...Sg4-h6 4.Se7-d5 # {} 1...Rb8-b7 2.Sg8-e7 threat: 3.Se7*f5 # 2...Sg4-h6 3.Se7-d5 # 2...Rb7*e7 3.Sa4-b6 { 1.25p} 4.Sb6-c4 # 3...Sg4-e5 4.Sb6-d5 # {} 1...Sg4-e5 2.Rh4-f4 {followed by} 3.Rf4-f3 + {or} 3.Kb1-c1 { 1.25p}
tries} 1.Ba8-f3 ? {(threatens} 2.Qe1-g1 + 2...Ke3-d2 3.Ka1-b1 threat: 4.Qg1-c1 # {) but } 1...Sg4-e5 ! {} 1.Ba8-b7 ? {(threatens} 2.Sa4-b6 2...Sg4-e5 3.Sb6-d5 # {or} 2.Sg8-e7 2...Sg4-h6 3.Se7-d5 # {) but} 1...Sf8-d7 ! {} 1.Ka1-b1 ! {(threatens} 2.Ba8-f3 {followed by} 3.Qe1-g1 + { 1.25p} 3...Ke3-d2 4.Qg1-c1 # 3...Sg4-f2 4.Qg1-c1 # {)} 1...Ra7-b7 2.Sa4-b6 threat: 3.Sb6-c4 # 2...Sg4-e5 3.Sb6-d5 # 2...Rb7*b6 3.Sg8-e7 { 1.25p} 4.Se7*f5 # 3...Sg4-h6 4.Se7-d5 # {} 1...Rb8-b7 2.Sg8-e7 threat: 3.Se7*f5 # 2...Sg4-h6 3.Se7-d5 # 2...Rb7*e7 3.Sa4-b6 { 1.25p} 4.Sb6-c4 # 3...Sg4-e5 4.Sb6-d5 # {} 1...Sg4-e5 2.Rh4-f4 {followed by} 3.Rf4-f3 + {or} 3.Kb1-c1 { 1.25p}
6
Give complete solutionFritz Giegold Deutsche Schachblätter 1976
white Pf6f5e4d3h3d5c4a5 Sg4 Bb5g1 Rb2c2 Kc1
black Bg8 Rh8 Kh7 Pf7g5h4a7d6c5d4e5
#6(14+11)
{}
1.Bb5-e8 !
1...a7-a6
2.Rc2-c3
2...d4*c3
3.Rb2-b6
3...c3-c2
4.Bg1*c5
4...d6*c5
5.Rb6-e6
5...f7*e6
6.Be8-g6 # { 5p }
7
Give main variationAndreij Jasik 1st Prize Solidarity Tourney 2012
white Rb4b1 Pc5b3 Ka1 Se7
black Be3 Rh3h4 Sb7 Ka7
+(6+5)
{ }
1.Se7-c6+ Ka7-a8 2.Rb4-b6 { 1p}
2...Be3-d4+ 3.Rb1-b2! { 1p}
3...Bd4*b2 + 4.Ka1-a2! { 1p}
{4.Rxb2? Txb3 5.Txb3 Th2+ 6.Rb1 Th1+}
4...Rh4-a4 + ! 5.b3*a4 Rh3-a3 + 6.Ka2-b1 ! { 1p}
{6.Kxb2? Rxa4! ZZ}
6...Ra3-a1 + 7.Kb1-c2 ! Ra1*a4 8.Kc2*b2 {+- 1p
Reciprocal zugzwang, for example} 8...Sb7*c5 9.Rb6-b8 #
8
Give complete solutions.C.J.A.Jones 1st Prize Problem Forum 2005
white Bb6 Kb5 Pd6d3 Re7
black Sa6 Ke3 Pe2f2f4g6d7b4 Qe6 Rd4 Bc3
h#3(5+11)b) -Pf4
{
} a) {} 1.f4-f3 Bb6-d8 2.Rd4*d6 Re7*d7 3.Rd6-c6 Bd8-g5 # { 2.5p} b) -bPf4 {-pf4} 1.Bc3-d2 Re7-h7 2.Qe6*d6 Bb6-c7 3.Qd6-e7 Rh7-h3 # { 2.5p}
} a) {} 1.f4-f3 Bb6-d8 2.Rd4*d6 Re7*d7 3.Rd6-c6 Bd8-g5 # { 2.5p} b) -bPf4 {-pf4} 1.Bc3-d2 Re7-h7 2.Qe6*d6 Bb6-c7 3.Qd6-e7 Rh7-h3 # { 2.5p}
9
Give the key and variationsNorman A. Macleod & Edward Boswellversion Edgar HOLLADAYParallèle 50 1951
white Bd8e4 Sb7f3 Pa6f2e2b3a4 Qh6 Ke3 Rd1c2
black Kc6 Sd6 Pd7d5e5f5c3b4
s#2(13+8)
{}
1.Bd8-a5 ! { 1.25p}
1...d5*e4
2.Sf3-g5
2...f5-f4 # { 1.25p}
1...f5*e4
2.Sf3-d2
2...d5-d4 # { 1.25p}
1...f5-f4 +
2.Ke3-d3
2...d5*e4 #
10
Give the key, the threat and the variationsVukota Nikoletic 1er Prix harmonie 2000
white Pc6 Rh4g2 Sg1f3 Qb4 Kd5 Bd4e6
black Sa8g4 Pb6b5e7f7f5g5g3a2 Rf6 Bg6 Kf4
s#4(9+13)
{ }
1.Sf3-e1 ! threat:
2.Bd4*f6 +
2...Kf4-e3
3.Bf6*g5 +
3...f5-f4
4.Qb4-e4 +
4...Bg6*e4 # { 1.25p}
1...a2-a1=B
2.Bd4*b6 +
2...Ba1-d4
3.Qb4-d2 +
3...Bd4-e3
4.Bb6-c7 +
4...Sa8*c7 # { 1.25p}
1...Rf6*e6
2.Bd4-f2 +
2...Re6-e4
3.Bf2*g3 +
3...Kf4-e3
4.Qb4-d4 +
4...Re4*d4 # { 1.25p}
1...Bg6-h5
2.Bd4-e3 +
2...Kf4*e3
3.Se1-c2 +
3...Ke3-d3
4.Be6*f5 +
4...Rf6*f5 # { 1.25p}
11
Give the keyJuraj Brabec & Ludovit Lehen1st Prize Mémorial J.P.Boyer 1988
white LEd5g4h3 Pc5d4f4f3 Rd3 Be1 Sf7 Ke5
black LEh5e8b8 Kc4 Pb4e2h6
#2(11+7)
d5, g4, h3, h5, e8, b8: Leo
{
} 1.Ke5-d6 ! { 5p threatens} 2.LEg4-e6 # 1...LEh5-g6 {or} 1...LEh5-f5 2.LEg4*e2 # {} 1...LEb8-b6 2.Sf7-e5 # {} 1...LEe8-e6 2.LEh3*e6 # {} 1...LEe8*e1 {or} 1...LEe8-c6 {or} 1...LEe8-g8 2.f4-f5 # {}
} 1.Ke5-d6 ! { 5p threatens} 2.LEg4-e6 # 1...LEh5-g6 {or} 1...LEh5-f5 2.LEg4*e2 # {} 1...LEb8-b6 2.Sf7-e5 # {} 1...LEe8-e6 2.LEh3*e6 # {} 1...LEe8*e1 {or} 1...LEe8-c6 {or} 1...LEe8-g8 2.f4-f5 # {}
12
Give complete solutions.Waldemar Tura1er Prix Wola Gulowska 2000
white PAa6e7 Pa4b5c6h4e4f6 Ka5 LEh2 Se6f7 Rh7 Bh8
black Pa7c4e2f2 LEc3 VAe3 Be1 Kg6
s#2(14+8)
a6, e7: Pao
h2, c3: Leo
e3: Vao
{}
1.Se6-c5 ! threat:
2.Rh7-g7 +
2...LEc3*g7 # { 1.25p}
1...LEc3-d2
2.c6-c7 +
2...LEd2-d6 # { 1.25p}
1...LEc3-b4
2.LEh2-d6 +
2...LEb4*d6 # { 1.25p}
1...VAe3-d4
2.Sf7-e5 +
2...LEc3*e5 # { 1.25p}
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