MESON Chess Problem Database
Problem Display
PID: 76875 (1K1bN2n/2P1p2r/R2qk1p1/1Q6/8/5Rp1/6N1/8 w - - 0 1)
Holladay, Edgar Dinwiddie
Chess, 1956
#2
7 + 8
| 6232 | Holladay Chess Problems | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Qxa6
- 2.cxd8S#
- 1...Qb6+
- 2.Rxb6#
- 1...Qc6
- 2.c8Q#
- 2.c8B#
- 1...Rh1
- 2.Sg7#
- 1...Rh2
- 2.Sg7#
- 1...Rh3
- 2.Sg7#
- 1...Rh4
- 2.Sg7#
- 1...Rh5
- 2.Sg7#
- 1...Rh6
- 2.Sg7#
- 1...Rf7
- 2.Re3#
- 1...Rg7
- 2.Sxg7#
- 1...Bxc7+
- 2.Sxc7#
- 1...Sf7
- 2.Sf4#
- 1...g5
- 2.Qf5#
- 1...Qxa6
- Tries
- 1.Ka7?
- threat
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Qb6+
- 2.Rxb6#
- 1...Bxc7
- 2.Sxc7#
- 1...Qc6
- 2.c8Q#
- 2.c8B#
- 1...Rh1
- 2.Sg7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Rh2
- 2.Sg7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Rh3
- 2.Sg7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Rh4
- 2.Sg7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Rh5
- 2.Sg7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Rh6
- 2.Sg7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Rf7
- 2.Re3#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Rg7
- 2.Sxg7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Sf7
- 2.Sf4#
- 2.c8Q#
- 2.c8B#
- 1...g5
- 2.Qf5#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Qxa6+!
- threat
- 1.Kc8?
- threat
- 2.cxd8S#
- 1...Bxc7
- 2.Sxc7#
- 1...Qc6
- 2.Rxc6#
- 1...Sf7
- 2.Sf4#
- 1...Qxa6+!
- threat
- 1.Rf2?
- 1...Qb6+
- 2.Rxb6#
- 1...Bxc7+
- 2.Sxc7#
- 1...Qxa6
- 2.cxd8S#
- 1...Qc6
- 2.c8Q#
- 2.c8B#
- 1...Sf7
- 2.Sf4#
- 1...Rh1
- 2.Sg7#
- 1...Rh2
- 2.Sg7#
- 1...Rh3
- 2.Sg7#
- 1...Rh4
- 2.Sg7#
- 1...Rh5
- 2.Sg7#
- 1...Rh6
- 2.Sg7#
- 1...Rf7
- 2.Re2#
- 1...Rg7
- 2.Sxg7#
- 1...g5
- 2.Qf5#
- 1...gxf2!
- 1...Qb6+
- 1.Rf4?
- 1...Qb6+
- 2.Rxb6#
- 1...Bxc7+
- 2.Sxc7#
- 1...Qxa6
- 2.cxd8S#
- 1...Qc6
- 2.c8Q#
- 2.c8B#
- 1...Rh1
- 2.Sg7#
- 1...Rh2
- 2.Sg7#
- 1...Rh3
- 2.Sg7#
- 1...Rh4
- 2.Sg7#
- 1...Rh5
- 2.Sg7#
- 1...Rh6
- 2.Sg7#
- 1...Rf7
- 2.Re4#
- 1...Rg7
- 2.Sxg7#
- 1...g5
- 2.Qf5#
- 1...Sf7!
- 1...Qb6+
- 1.Rf8?
- threat
- 2.Sf4#
- 1...Qb6+
- 2.Rxb6#
- 1...Bxc7+
- 2.Sxc7#
- 1...Qc6
- 2.c8Q#
- 2.c8B#
- 1...Rh4
- 2.Sg7#
- 1...g5
- 2.Qf5#
- 1...Rf7!
- threat
- 1.Rb6?
- 1...Bxc7+
- 2.Sxc7#
- 1...Qc6
- 2.c8Q#
- 2.c8B#
- 1...Sf7
- 2.Sf4#
- 1...Rh1
- 2.Sg7#
- 1...Rh2
- 2.Sg7#
- 1...Rh3
- 2.Sg7#
- 1...Rh4
- 2.Sg7#
- 1...Rh5
- 2.Sg7#
- 1...Rh6
- 2.Sg7#
- 1...Rf7
- 2.Re3#
- 1...Rg7
- 2.Sxg7#
- 1...g5
- 2.Qf5#
- 1...Qxb6+!
- 1...Bxc7+
- 1.Ka7?
- Keys
- 1.Rf1!
- 1...Qb6+
- 2.Rxb6#
- 1...Bxc7+
- 2.Sxc7#
- 1...Qxa6
- 2.cxd8S#
- 1...Qc6
- 2.c8Q#
- 2.c8B#
- 1...Sf7
- 2.Sf4#
- 1...Rh1
- 2.Sg7#
- 1...Rh2
- 2.Sg7#
- 1...Rh3
- 2.Sg7#
- 1...Rh4
- 2.Sg7#
- 1...Rh5
- 2.Sg7#
- 1...Rh6
- 2.Sg7#
- 1...Rf7
- 2.Re1#
- 1...Rg7
- 2.Sxg7#
- 1...g5
- 2.Qf5#
- 1...Qb6+
- 1.Rf1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(b);N_PINP(E),N_SPINQ(b),XR(D)::PXB(g)=S
- Q(b);CHECK,N_PINP(E),OGATEB::R(D),XQ(b)
- Q(b);N_PINP(E)::P=Q
- R(f);N_GUARD::S(G)
- R(f);SBLOCK::R(B)
- R(f);N_GUARD::S(G),XR(f)
- B(g);CHECK,XP(E)::S(G),XB(g)
- S(h);SBLOCK::S(A)
- P(d);N_GUARD::QAB1(C)
- Tries
- Try
- K(F);N_SPINP(E),S_FLIGHT
- Threat
- DUALS(3)
- Vars
- Q(b);CHECK,OGATEB::R(D),XQ(b)
- B(g);XP(E)::S(G),XB(g)
- Q(b);::P=Q
- Refutation
- Q(b);CHECK,N_SPINQ(b),XR(D)
- Try
- K(F);N_SPINP(E),P-FLIGHT
- Threat
- PXB(g)=S
- Vars
- B(g);XP(E)::S(G),XB(g)
- Q(b);OGATEB,P_PINP(E)::R(D),XQ(b)
- S(h);SBLOCK::S(A)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XR(D)
- Try
- R(B);
- Vars
- Q(b);CHECK,N_PINP(E),OGATEB::R(D),XQ(b)
- B(g);CHECK,XP(E)::S(G),XB(g)
- Q(b);N_PINP(E),N_SPINQ(b),XR(D)::PXB(g)=S
- Q(b);N_PINP(E)::P=Q
- S(h);SBLOCK::S(A)
- R(f);N_GUARD::S(G)
- R(f);SBLOCK::R(B)
- R(f);N_GUARD::S(G),XR(f)
- P(d);N_GUARD::QAB1(C)
- Refutation
- P(a);XR(B)
- Try
- R(B);
- Vars
- Q(b);CHECK,N_PINP(E),OGATEB::R(D),XQ(b)
- B(g);CHECK,XP(E)::S(G),XB(g)
- Q(b);N_PINP(E),N_SPINQ(b),XR(D)::PXB(g)=S
- Q(b);N_PINP(E)::P=Q
- R(f);N_GUARD::S(G)
- R(f);SBLOCK::R(B)
- R(f);N_GUARD::S(G),XR(f)
- P(d);N_GUARD::QAB1(C)
- Refutation
- S(h);
- Try
- R(B);
- Threat
- S(A)
- Vars
- Q(b);CHECK,N_PINP(E),OGATEB::R(D),XQ(b)
- B(g);CHECK,XP(E)::S(G),XB(g)
- Q(b);N_PINP(E)::P=Q
- R(f);N_GUARD::S(G)
- P(d);N_GUARD::QAB1(C)
- Refutation
- R(f);
- Try
- R(D);
- Vars
- B(g);CHECK,XP(E)::S(G),XB(g)
- Q(b);N_PINP(E)::P=Q
- S(h);SBLOCK::S(A)
- R(f);N_GUARD::S(G)
- R(f);SBLOCK::R(B)
- R(f);N_GUARD::S(G),XR(f)
- P(d);N_GUARD::QAB1(C)
- Refutation
- Q(b);CHECK,N_PINP(E),N_SPINQ(b),XR(D)
- Try
- Actual
- R(B);
- Vars
- Q(b);CHECK,N_PINP(E),OGATEB::R(D),XQ(b)
- B(g);CHECK,XP(E)::S(G),XB(g)
- Q(b);N_PINP(E),N_SPINQ(b),XR(D)::PXB(g)=S
- Q(b);N_PINP(E)::P=Q
- S(h);SBLOCK::S(A)
- R(f);N_GUARD::S(G)
- R(f);SBLOCK::R(B)
- R(f);N_GUARD::S(G),XR(f)
- P(d);N_GUARD::QAB1(C)
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).