MESON Chess Problem Database
Problem Display
PID: 63738 (1K6/B2p1QPr/1n1pP2p/3Bkp1P/RN2p3/2R2pP1/4NP2/8 w - - 0 1)
Zappas, Byron
Probleemblad, 1976
#2
13 + 9
| 3771 | FIDE Album (1974-1976) | 1980 |
SOLUTION
- SOUND
- Sets
- 1...Rxg7
- 2.Qxg7#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sxa4
- 2.Bd4#
- 1...Sc4
- 2.Bd4#
- 1...Sxd5
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...e3
- 2.Rxe3#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...dxe6
- 2.Qxe6#
- 1...Rxg7
- Tries
- 1.Kb7?
- 1...Rxg7
- 2.Qxg7#
- 1...Sxa4
- 2.Bd4#
- 1...Sxd5
- 2.Bd4#
- 1...dxe6
- 2.Qxe6#
- 1...Rh8
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...e3
- 2.Rxe3#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...fxe2!
- 1...Rxg7
- 1.Sd4?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Kxd4
- 2.Qf6#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxa4
- 2.Qxf5#
- 1...Sxd5
- 2.Qxf5#
- 1...dxe6
- 2.Sdc6#
- 1...Sc4
- 2.Qxf5#
- 1...Sa8
- 2.Qxf5#
- 1...Sc8
- 2.Qxf5#
- 1...e3
- 2.Sxf3#
- 1...f4!
- 1...Rh8+
- 1.Sd3+?
- 1...Kxd5
- 2.Sef4#
- 2.Rd4#
- 2.Ra5#
- 2.Qxf5#
- 2.exd7#
- 2.e7#
- 1...exd3!
- 1...Kxd5
- 1.Sc6+?
- 1...Kxd5
- 2.Sf4#
- 2.Rd4#
- 2.Ra5#
- 2.Qxf5#
- 2.exd7#
- 2.e7#
- 1...dxc6!
- 1...Kxd5
- 1.Bxb6?
- threat
- 2.Bd4#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...fxe2!
- threat
- 1.Rca3?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxa4
- 2.Bd4#
- 1...Sxd5
- 2.Bd4#
- 1...dxe6
- 2.Qxe6#
- 1...e3
- 2.Rxe3#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...fxe2!
- 1...Rh8+
- 1.Rb3?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxa4
- 2.Bd4#
- 1...Sxd5
- 2.Bd4#
- 1...dxe6
- 2.Qxe6#
- 1...e3
- 2.Rxe3#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...fxe2!
- 1...Rh8+
- 1.Re3?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxa4
- 2.Bd4#
- 1...Sxd5
- 2.Sd3#
- 2.Bd4#
- 1...dxe6
- 2.Qxe6#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.Rxe4#
- 2.Qxf4#
- 2.gxf4#
- 1...fxe2!
- 1...Rh8+
- 1.Rxf3?
- threat
- 2.Rxf5#
- 2.Qxf5#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...dxe6
- 2.Qxe6#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...exf3!
- threat
- 1.Ra1?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxd5
- 2.Bd4#
- 1...dxe6
- 2.Qxe6#
- 1...e3
- 2.Rxe3#
- 1...Sa4
- 2.Bd4#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...fxe2!
- 1...Rh8+
- 1.Ra2?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxd5
- 2.Bd4#
- 1...dxe6
- 2.Qxe6#
- 1...e3
- 2.Rxe3#
- 1...Sa4
- 2.Bd4#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...fxe2!
- 1...Rh8+
- 1.Raa3?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxd5
- 2.Bd4#
- 1...dxe6
- 2.Qxe6#
- 1...e3
- 2.Rxe3#
- 1...Sa4
- 2.Bd4#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...fxe2!
- 1...Rh8+
- 1.Ra5?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxd5
- 2.Bd4#
- 2.Rxd5#
- 1...dxe6
- 2.Sc6#
- 2.Qxe6#
- 1...e3
- 2.Sd3#
- 2.Rxe3#
- 1...Sa4
- 2.Bd4#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...fxe2!
- 1...Rh8+
- 1.Ra6?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxd5
- 2.Bd4#
- 1...dxe6
- 2.Qxe6#
- 1...e3
- 2.Rxe3#
- 1...Sa4
- 2.Bd4#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 1...fxe2!
- 1...Rh8+
- 1.Qg6?
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxa4
- 2.Bd4#
- 1...Sxd5
- 2.Bd4#
- 1...dxe6
- 2.Qxe6#
- 1...e3
- 2.Rxe3#
- 1...Sc4
- 2.Bd4#
- 1...Sa8
- 2.Bd4#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.gxf4#
- 1...fxe2!
- 1...Rh8+
- 1.g4?
- threat
- 2.Qxf5#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...fxg4
- 2.Qf4#
- 1...dxe6
- 2.Qxe6#
- 1...f4
- 2.Qxf4#
- 2.Qf5#
- 1...fxe2!
- threat
- 1.exd7?
- threat
- 2.Sc6#
- 2.Qe6#
- 2.Qe7#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Sc6#
- 2.Qe6#
- 2.Qxg7#
- 1...Sxd5
- 2.Sc6#
- 2.Bd4#
- 1...fxe2
- 2.Sc6#
- 1...Sc8
- 2.Sc6#
- 2.Bd4#
- 2.Qe6#
- 1...f4
- 2.Sc6#
- 2.Qe6#
- 2.Qxf4#
- 2.gxf4#
- 1...Sxd7+!
- threat
- 1.e7?
- threat
- 2.e8Q#
- 2.e8R#
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxg7
- 2.Qxg7#
- 2.e8Q#
- 2.e8R#
- 1...Sxa4
- 2.Bd4#
- 2.e8Q#
- 2.e8R#
- 1...Sxd5
- 2.Bd4#
- 1...e3
- 2.Sd3#
- 2.Rxe3#
- 2.e8Q#
- 2.e8R#
- 1...Sc4
- 2.Bd4#
- 2.e8Q#
- 2.e8R#
- 1...Sa8
- 2.Bd4#
- 2.e8Q#
- 2.e8R#
- 1...Sc8
- 2.Bd4#
- 1...f4
- 2.Qxf4#
- 2.gxf4#
- 2.e8Q#
- 2.e8R#
- 1...fxe2!
- threat
- 1.g8S?
- threat
- 2.Qf6#
- 1...Sxd5
- 2.Bd4#
- 1...Rxf7!
- threat
- 1.Kb7?
- Keys
- 1.Sf4!
- 1...Rh8+
- 2.gxh8Q#
- 2.gxh8B#
- 1...Kd4
- 2.Qf6#
- 1...Rxg7
- 2.Qxg7#
- 1...Sxa4
- 2.Sg6#
- 1...Sxd5
- 2.Sg6#
- 1...dxe6
- 2.Sc6#
- 1...Sc4
- 2.Sg6#
- 1...Sa8
- 2.Sg6#
- 1...Sc8
- 2.Sg6#
- 1...e3
- 2.Sbd3#
- 1...Rh8+
- 1.Sf4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 7
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- R(i);CHECK,OGATE::PXR(i)=Q
- S(e);OGATE,XR(E)::B(J)
- S(e);OGATE::B(J)
- S(e);OGATE,XB(G)::B(J)
- P(b);OGATEB::R(C),XP(b)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- Tries
- Try
- K(M);P-FLIGHT
- Vars
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE,XR(E)::B(J)
- S(e);OGATE,XB(G)::B(J)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- R(i);OGATE::PXR(i)=Q
- S(e);OGATE::B(J)
- P(b);OGATEB::R(C),XP(b)
- Refutation
- P(a);XS(A)
- Try
- S(A);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- K(c);P_SPINS(e),S_FLIGHT,XS(A)::QAB(K)
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);XR(E)::QAR1(K),XP(d)
- S(e);XB(G)::QAR1(K),XP(d)
- P(h);N_GUARD,XP(I)::S(A)
- S(e);::QAR1(K),XP(d)
- P(b);N_GUARD::S(A),XP(a)
- Refutation
- P(d);
- Try
- S(F);CHECK
- Refutation
- P(b);XS(F)
- Try
- S(F);CHECK
- Refutation
- P(h);XS(F)
- Try
- B(J);XS(e)
- Threat
- B(J)
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- Refutation
- P(a);XS(A)
- Try
- R(C);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE,XR(E)::B(J)
- S(e);OGATE,XB(G)::B(J)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- P(b);OGATEB::R(C),XP(b)
- S(e);OGATE::B(J)
- Refutation
- P(a);XS(A)
- Try
- R(C);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE,XR(E)::B(J)
- S(e);OGATE,XB(G)::B(J)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- P(b);OGATEB::R(C),XP(b)
- S(e);OGATE::B(J)
- Refutation
- P(a);XS(A)
- Try
- R(C);P_PINP(b)
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE,XR(E)::B(J)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- S(e);OGATE::B(J)
- Refutation
- P(a);XS(A)
- Try
- R(C);XP(a)
- Threat
- DUALS(2)
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- Refutation
- P(b);XR(C)
- Try
- R(E);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE,XB(G)::B(J)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- P(b);OGATEB::R(C),XP(b)
- S(e);OGATE::B(J)
- Refutation
- P(a);XS(A)
- Try
- R(E);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE,XB(G)::B(J)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- P(b);OGATEB::R(C),XP(b)
- S(e);OGATE::B(J)
- Refutation
- P(a);XS(A)
- Try
- R(E);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE,XB(G)::B(J)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- P(b);OGATEB::R(C),XP(b)
- S(e);OGATE::B(J)
- Refutation
- P(a);XS(A)
- Try
- R(E);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE::B(J)
- Refutation
- P(a);XS(A)
- Try
- R(E);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE,XB(G)::B(J)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- P(b);OGATEB::R(C),XP(b)
- S(e);OGATE::B(J)
- Refutation
- P(a);XS(A)
- Try
- Q(K);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);OGATE,XR(E)::B(J)
- S(e);OGATE,XB(G)::B(J)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- P(b);OGATEB::R(C),XP(b)
- S(e);OGATE::B(J)
- P(d);OGATE::P(D),XP(d)
- Refutation
- P(a);XS(A)
- Try
- P(D);
- Threat
- QAR1(K),XP(d)
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- P(d);OGATE,XP(D)::QAB1(K)
- P(h);OGATE,XP(I)::QAR1(K),XP(h)
- Refutation
- P(a);XS(A)
- Try
- P(I);XP(h)
- Threat
- DUALS(3)
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- P(a);XS(A)::S(F)
- Refutation
- S(e);CHECK,XP(I)
- Try
- P(I);
- Threat
- P=Q
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- S(e);OGATE,XB(G)::B(J)
- S(e);OGATE::B(J)
- Refutation
- P(a);XS(A)
- Try
- P(L);
- Threat
- QAB1(K)
- Vars
- S(e);OGATE,XB(G)::B(J)
- Refutation
- R(i);XQ(K)
- Try
- Actual
- S(A);
- Vars
- R(i);CHECK,OGATE::PXR(i)=Q
- K(c);P_SPINS(e),S_FLIGHT::QAB(K)
- R(i);OGATE,XP(L)::QAB(K),XR(i)
- S(e);XR(E)::S(A)
- S(e);XB(G)::S(A)
- P(h);N_GUARD,XP(I)::S(F)
- S(e);::S(A)
- P(b);N_GUARD::S(F)
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).