11. WCCT: B – #3
Tému navrhla krajina: Slovensko
Rozhodcovské krajiny: Bielorusko, India, Holandsko, Severné Macedónsko, Švédsko
Náhradník: Švajčiarsko
TÉMAB
Slovensky:
Zámena matov v podvariantoch (t.j. variantoch v druhom ťahu čierneho) v riešení. Požadujú sa aspoň dva podvarianty so zámenou matov medzi aspoň dvomi variantmi začínajúcimi sa prvým ťahom čierneho. Hrozba môže byť jedným z týchto variantov po prvom ťahu bieleho.
Zámena matov v podvariantoch (t.j. variantoch v druhom ťahu čierneho) v riešení. Požadujú sa aspoň dva podvarianty so zámenou matov medzi aspoň dvomi variantmi začínajúcimi sa prvým ťahom čierneho. Hrozba môže byť jedným z týchto variantov po prvom ťahu bieleho.
Anglicky:
Changed mates in sub-variations (variations on Black’s second move) in the solution. There must be at least two sub-variations with changed mates between at least two variations on Black’s first move. The threat may be one of those first-move variations.
Changed mates in sub-variations (variations on Black’s second move) in the solution. There must be at least two sub-variations with changed mates between at least two variations on Black’s first move. The threat may be one of those first-move variations.
PRÍKLADYB
The Problemist 1955 (v)
white Ka1 Qa8 Rg3c2 Ba5 Sg5c1 Ph7d6c5d5b4
black Kd4 Rh2 Bh1 Sf2 Pb5e5e3h3
1.Ba5-b6 ! zugzwang.
1...Bh1-g2
2.Qa8-a2 threat:
3.c5-c6 #
2...Sf2-d3
3.Sc1-e2 # {(thematic)}
2...Sf2-e4
3.Sg5-e6 # {(thematic)}
1...Rh2-g2 {(Sf3)}
2.Qa8-g8 threat:
3.c5-c6 #
2...Sf2-d3
3.Sc1-b3 # {(thematic)}
2...Sf2-e4
3.Sg5-f3 # {(thematic)}
1...Sf2-d1 {(Jg4)}
2.Rg3-g4 +
2...Bh1-e4
3.Sg5-f3 #
3.Sg5-e6 #
3.Rg4*e4 #
2...e5-e4
3.h7-h8=Q #
3.h7-h8=B #
{Popeye Windows-32Bit v4.83 (1024 MB) / 1.218 s}
[B01]
#3 (12+8)
II. cena
Fizkuľtura i sport-60 JT, Šachmaty v SSSR 1983-84
white Kg7 Qc4 Rg3 Sc8e6 Pc5g5h4d2f2
black Ke5 Be4 Sb8g8 Pa7f6g6f4d3
1.Se6-f8 ! threat:
2.Sc8-d6 threat:
3.Qc4*e4 #
2...Be4-a8 {(2...Se4~) } {a}
3.Sf8*g6 # {(thematic)}
2...Be4-d5 ! {b}
3.Qc4-c3 # {(thematic)}
2...Be4-f5 {c}
3.Sd6-f7 # {(thematic)}
1...f4-f3
2.Rg3-g4 threat:
3.Qc4*e4 #
2...Be4-a8 {(2...Se4~) } {a}
3.Qc4-e6 # {(thematic)}
2...Be4-d5 ! {b}
3.Qc4-f4 #
2...Be4-f5 ! {c}
3.Qc4-d4 #
1...Be4-a8 {(1...Se4~) } {a}
2.Sf8*g6 + {(NON-thematic)}
2...Ke5-f5
3.Sc8-d6 #
1...Be4-d5 ! {b}
2.Qc4-c3 + {(NON-thematic)}
2...Ke5-e4
3.Sc8-d6 #
2...Ke5-f5
3.Sc8-d6 #
1...Be4-f5 ! {c}
2.Rg3-e3 + {(NON-thematic)}
2...f4*e3
3.f2-f4 #
2...Bf5-e4
3.Qc4*e4 #
{Popeye Windows-32Bit v4.83 (1024 MB) / 0.124 s}
[B02]
#3 (10+9)
The same defences on B1 is not a part of required theme.
II. cena
Chess Life & Review 1985
white Ka8 Qb8 Rg6 Bh5f4 Sc8c3 Pc6e6e5f3g3
black Kf5 Rd8 Be8b4 Sg2 Pb7g7c4
1.Sc3-b5 ! threat:
2.Rg6-g5 +
2...Kf5*e6
3.Sb5-c7 #
1...Be8*c6
2.Sc8-d6 + {display-departure-file}
2...Rd8*d6
3.Qb8-f8 # {(thematic)}
2...Bb4*d6
3.Sb5-d4 # {(thematic)}
1...b7*c6
2.Sb5-d6 + {display-departure-file}
2...Rd8*d6
3.Sc8-e7 # {(thematic)}
2...Bb4*d6
3.Qb8-b1 # {(thematic)}
1...Rd8-d7
2.Qb8-d6 threat:
3.Rg6-g5 #
3.Sb5-d4 #
2...Rd7*d6
3.Sc8-e7 #
{Popeye Windows-32Bit v4.83 (1024 MB) / 0.124 s}
[B03]
#3 (12+8)
Cena
Phénix 1989
white Ka8 Qb1 Re4 Ba2a1 Sc5h3 Pa6g6g5h5
black Kf5 Rb3 Bd8c4 Sb2 Pc6e6b4g4g3
1.g6-g7 ! threat:
2.g7-g8=Q threat:
3.Qg8-h7 #
3.Qg8-g6 #
1...Bc4*a6
2.Re4-e2 +
2...Ba6-d3 {a}
3.Qb1-f1 # {(thematic)}
2...Rb3-d3 {b}
3.Ba2*e6 # {(thematic)}
2...Sb2-d3
3.Re2-e5 #
1...Rb3-a3
2.Re4-e3 +
2...Sb2-d3
3.Re3-e5 #
2...Bc4-d3 {a}
3.Ba2*e6 # {(thematic)}
2...Ra3-d3 {b}
3.Qb1-f1 # {(thematic)}
{Popeye Windows-32Bit v4.83 (1024 MB) / 1.140 s}
[B04]
#3 (11+10)
Exchange of mates and cyclic changes are also considered thematic.
I. cena
Phénix 1992
white Kh7 Qg7 Re7d4 Bf7h4 Sg8h1 Pg6
black Kf5 Qa3 Rg5e3 Bd6 Sg4 Pd5h5c4
1.Bh4-g3 ! threat:
2.Qg7-e5 +
2...Sg4*e5
3.Bf7-e6 #
3.Rd4-f4 #
2...Bd6*e5 {a}
3.Bf7-e6 #
2...Re3*e5 {b}
3.Rd4-f4 #
1...Qa3-c1
2.Bg3-e5 threat:
3.Bf7-e6 #
3.Rd4-f4 #
2...Re3*e5 {a}
3.Sh1-g3 # {(thematic)}
2...Bd6*e5 {b}
3.Bf7-e6 # {(thematic)}
1...Qa3-a6
2.Re7-e5 +
2...Re3*e5 {a}
3.Rd4-f4 # {(thematic)}
2...Bd6*e5 {b}
3.Sg8-e7 # {(thematic)}
1...Bd6*g3
2.Sh1*g3 +
2...Re3*g3
3.Bf7-e6 #
1...Re3*e7
2.Sg8*e7 +
2...Bd6*e7
3.Rd4-f4 #
{Popeye Windows-32Bit v4.83 (1024 MB) / 0.249 s}
[B05]
#3 (9+9)
The theme is shown in variations 1...Qa6 and 1...Qc1. The repetition of mates in threat does not matter.