MESON Chess Problem Database
Problem Display
PID: 101012 (8/8/4n2B/1R3N1b/8/2k2P1R/1N6/1n1K4 w - - 0 1)
Heydon, Joseph Kentigern
Good Companions, 1921
#2
7 + 4
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bxf3+
- 2.Rxf3#
- 1...Bg4
- 2.fxg4#
- 1...Bg6
- 2.f4#
- 1...Bf7
- 2.f4#
- 1...Be8
- 2.f4#
- 1...Sd2
- 2.Bxd2#
- 1...Sa3
- 2.Bd2#
- 1...Sf4
- 2.Bg7#
- 1...Sc5
- 2.Bg7#
- 1...Sg5
- 2.Bg7#
- 1...Sc7
- 2.Bg7#
- 1...Sg7
- 2.Bxg7#
- 1...Sd8
- 2.Bg7#
- 1...Sf8
- 2.Bg7#
- 1...Bxf3+
- Tries
- 1.Kc1?
- 1...Bxf3
- 2.Rxf3#
- 1...Bg4
- 2.fxg4#
- 1...Bg6
- 2.f4#
- 1...Bf7
- 2.f4#
- 1...Be8
- 2.f4#
- 1...Sd2
- 2.Bxd2#
- 1...Sa3
- 2.Bd2#
- 1...Sf4
- 2.Bg7#
- 1...Sc5
- 2.Bg7#
- 1...Sg5
- 2.Bg7#
- 1...Sc7
- 2.Bg7#
- 1...Sg7
- 2.Bxg7#
- 1...Sd8
- 2.Bg7#
- 1...Sf8
- 2.Bg7#
- 1...Sd4!
- 1...Bxf3
- 1.Bg7+?
- 1...Sd4
- 2.Bxd4#
- 1...Sxg7!
- 1...Sd4
- 1.Rg3?
- 1...Bxf3+
- 2.Rxf3#
- 1...Bg4
- 2.fxg4#
- 1...Bg6
- 2.f4#
- 1...Bf7
- 2.f4#
- 1...Be8
- 2.f4#
- 1...Sd2
- 2.Bxd2#
- 1...Sa3
- 2.Bd2#
- 1...Sf4
- 2.Bg7#
- 1...Sc5
- 2.Bg7#
- 1...Sg5
- 2.Bg7#
- 1...Sc7
- 2.Bg7#
- 1...Sg7
- 2.Bxg7#
- 1...Sd8
- 2.Bg7#
- 1...Sf8
- 2.Bg7#
- 1...Sd4!
- 1...Bxf3+
- 1.Rxh5?
- 1...Sd2
- 2.Bxd2#
- 1...Sa3
- 2.Bd2#
- 1...Sf4
- 2.Bg7#
- 1...Sc5
- 2.Bg7#
- 1...Sg5
- 2.Bg7#
- 1...Sc7
- 2.Bg7#
- 1...Sg7
- 2.Bxg7#
- 1...Sd8
- 2.Bg7#
- 1...Sf8
- 2.Bg7#
- 1...Sd4!
- 1...Sd2
- 1.Rb6?
- 1...Bxf3+
- 2.Rxf3#
- 1...Bg4
- 2.fxg4#
- 1...Bg6
- 2.f4#
- 1...Bf7
- 2.f4#
- 1...Be8
- 2.f4#
- 1...Sd2
- 2.Bxd2#
- 1...Sa3
- 2.Bd2#
- 1...Sf4
- 2.Bg7#
- 1...Sc5
- 2.Bg7#
- 1...Sg5
- 2.Bg7#
- 1...Sc7
- 2.Bg7#
- 1...Sg7
- 2.Bxg7#
- 1...Sd8
- 2.Bg7#
- 1...Sf8
- 2.Bg7#
- 1...Sd4!
- 1...Bxf3+
- 1.Rb7?
- 1...Bxf3+
- 2.Rxf3#
- 1...Bg4
- 2.fxg4#
- 1...Bg6
- 2.f4#
- 1...Bf7
- 2.f4#
- 1...Be8
- 2.f4#
- 1...Sd2
- 2.Bxd2#
- 1...Sa3
- 2.Bd2#
- 1...Sf4
- 2.Bg7#
- 1...Sc5
- 2.Bg7#
- 1...Sg5
- 2.Bg7#
- 1...Sc7
- 2.Bg7#
- 1...Sg7
- 2.Bxg7#
- 1...Sd8
- 2.Bg7#
- 1...Sf8
- 2.Bg7#
- 1...Sd4!
- 1...Bxf3+
- 1.Rb8?
- 1...Bxf3+
- 2.Rxf3#
- 1...Bg4
- 2.fxg4#
- 1...Bg6
- 2.f4#
- 1...Bf7
- 2.f4#
- 1...Be8
- 2.f4#
- 1...Sd2
- 2.Bxd2#
- 1...Sa3
- 2.Bd2#
- 1...Sf4
- 2.Bg7#
- 1...Sc5
- 2.Bg7#
- 1...Sg5
- 2.Bg7#
- 1...Sc7
- 2.Bg7#
- 1...Sg7
- 2.Bxg7#
- 1...Sd8
- 2.Bg7#
- 1...Sf8
- 2.Bg7#
- 1...Sd4!
- 1...Bxf3+
- 1.Kc1?
- Keys
- 1.Sg3!
- threat
- 2.Se2#
- 1...Kd4
- 2.Se2#
- 1...Sd4
- 2.Se4#
- 1...Sf4
- 2.Bg7#
- threat
- 1.Sg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- B(c);CHECK,OGATE,P_SPINB(c),XP(C)::R(D),XB(c)
- B(c);::R(D)+P(C),XB(c)
- B(c);N_PINP(C)::R(D)+P(C)
- S(a);N_GUARD::B(G),XS(a)
- S(a);N_GUARD::B(G)
- S(d);N_GUARD::B(G)
- S(d);N_GUARD::B(G),XS(d)
- Tries
- Try
- K(A);N_SPINP(C),P-FLIGHT
- Vars
- B(c);OGATE,P_SPINB(c),XP(C)::R(D),XB(c)
- B(c);OGATE::R(D)+P(C),XB(c)
- B(c);N_GUARD::R(D)+P(C)
- S(a);N_GUARD::B(G),XS(a)
- S(a);N_GUARD::B(G)
- S(d);N_GUARD::B(G)
- S(d);N_GUARD::B(G),XS(d)
- Refutation
- S(d);
- Try
- B(G);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::B(G),XS(d)
- Refutation
- S(d);XB(G)
- Try
- R(D);
- Vars
- B(c);CHECK,OGATE,P_SPINB(c),XP(C)::R(D),XB(c)
- B(c);::R(D)+P(C),XB(c)
- B(c);N_PINP(C)::R(D)+P(C)
- S(a);N_GUARD::B(G),XS(a)
- S(a);N_GUARD::B(G)
- S(d);N_GUARD::B(G)
- S(d);N_GUARD::B(G),XS(d)
- Refutation
- S(d);
- Try
- R(D);N_SPINP(C),XB(c)
- Vars
- S(a);N_GUARD::B(G),XS(a)
- S(a);N_GUARD::B(G)
- S(d);N_GUARD::B(G)
- S(d);N_GUARD::B(G),XS(d)
- Refutation
- S(d);
- Try
- R(E);
- Vars
- B(c);CHECK,OGATE,P_SPINB(c),XP(C)::R(D),XB(c)
- B(c);::R(D)+P(C),XB(c)
- B(c);N_PINP(C)::R(D)+P(C)
- S(a);N_GUARD::B(G),XS(a)
- S(a);N_GUARD::B(G)
- S(d);N_GUARD::B(G)
- S(d);N_GUARD::B(G),XS(d)
- Refutation
- S(d);
- Try
- R(E);
- Vars
- B(c);CHECK,OGATE,P_SPINB(c),XP(C)::R(D),XB(c)
- B(c);::R(D)+P(C),XB(c)
- B(c);N_PINP(C)::R(D)+P(C)
- S(a);N_GUARD::B(G),XS(a)
- S(a);N_GUARD::B(G)
- S(d);N_GUARD::B(G)
- S(d);N_GUARD::B(G),XS(d)
- Refutation
- S(d);
- Try
- R(E);
- Vars
- B(c);CHECK,OGATE,P_SPINB(c),XP(C)::R(D),XB(c)
- B(c);::R(D)+P(C),XB(c)
- B(c);N_PINP(C)::R(D)+P(C)
- S(a);N_GUARD::B(G),XS(a)
- S(a);N_GUARD::B(G)
- S(d);N_GUARD::B(G)
- S(d);N_GUARD::B(G),XS(d)
- Refutation
- S(d);
- Try
- Actual
- S(F);
- Threat
- S(F)
- Vars
- K(b);S_FLIGHT::S(F)
- S(d);SBLOCK::S(F)
- S(d);N_GUARD::B(G)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).