MESON Chess Problem Database
Problem Display
PID: 86238 (rR1n1n1N/2P1kPPb/4P3/b4B2/2qR2N1/3p3K/8/5Q2 w - - 0 1)
Baev, Georgy S
Loshinski, Lev Ilich
Cervona Belarus, 1932
#2
11 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.c8S#
- 1...Qb3
- 2.c8S#
- 1...Qb5
- 2.c8S#
- 1...Qd5
- 2.c8S#
- 1...Qa4
- 2.c8S#
- 1...Qb4
- 2.c8S#
- 1...Qxd4
- 2.c8S#
- 1...Be1
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bd2
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bc3
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bb4
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bg6
- 2.g8S#
- 1...Sc6
- 2.c8S#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Sb7
- 2.gxf8Q#
- 2.gxf8B#
- 1...Sxf7
- 2.gxf8Q#
- 2.gxf8B#
- 1...Sg6
- 2.Rd7#
- 1...Sd7
- 2.Rxd7#
- 1...Qa2
- Tries
- 1.Qe1?
- threat
- 2.Qh4#
- 1...Qxe6
- 2.c8S#
- 1...Qxd4
- 2.c8S#
- 1...Bxe1
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bxf5
- 2.g8S#
- 1...Sdxe6
- 2.gxf8Q#
- 2.gxf8B#
- 1...Sxf7
- 2.gxf8Q#
- 2.gxf8B#
- 1...Sfxe6
- 2.f8Q#
- 1...Qd5
- 2.c8S#
- 1...Bd2
- 2.cxd8Q#
- 2.cxd8B#
- 1...Sg6
- 2.Rd7#
- 1...Sd7
- 2.Rxd7#
- 1...Qc1!
- threat
- 1.Qf4?
- threat
- 2.Qg5#
- 2.Qd6#
- 1...Qxd4
- 2.c8S#
- 1...Qxc7
- 2.Qg5#
- 1...Bxc7
- 2.Qg5#
- 1...Bxf5
- 2.Qd6#
- 1...Sdxe6
- 2.Qd6#
- 1...Sxf7
- 2.gxf8Q#
- 2.gxf8B#
- 1...Sfxe6
- 2.Qd6#
- 1...Qd5
- 2.c8S#
- 1...Qa6
- 2.Qg5#
- 1...Qc1
- 2.Qd6#
- 1...Qb4
- 2.Qg5#
- 2.c8S#
- 1...Qc5
- 2.Qg5#
- 1...Qc6
- 2.Qg5#
- 1...Ra6
- 2.Qg5#
- 1...Bd2
- 2.Qd6#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Bb4
- 2.Qg5#
- 2.cxd8Q#
- 2.cxd8B#
- 1...Sb7
- 2.Qg5#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Sd7
- 2.Rxd7#
- 2.Qd6#
- 1...Qxe6!
- threat
- 1.cxd8R?
- threat
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qxe6
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qxd4
- 2.gxf8Q#
- 2.gxf8B#
- 1...Rxb8
- 2.gxf8Q#
- 2.gxf8B#
- 1...Bxf5
- 2.Re8#
- 1...Sxe6
- 2.R4d7#
- 2.R8d7#
- 2.Re8#
- 1...Qa2
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qb3
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qb5
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qd5
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qa6
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qc1
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qc2
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qc3
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qa4
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qb4
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qc5
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qc6
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qc7
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Qc8
- 2.gxf8Q#
- 2.gxf8B#
- 1...Ra6
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Ra7
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Be1
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Bd2
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Bc3
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Bb4
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Bb6
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Bc7
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Bg6
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 2.g8S#
- 1...Bg8
- 2.Re8#
- 2.fxg8S#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Sg6
- 2.R4d7#
- 2.R8d7#
- 2.Re8#
- 1...Sd7
- 2.R4xd7#
- 2.R8xd7#
- 2.Re8#
- 1...d2
- 2.Re8#
- 2.gxf8Q#
- 2.gxf8B#
- 1...Bxd8!
- threat
- 1.Qe1?
- Keys
- 1.Sg6+!
- 1...Bxg6
- 2.g8S#
- 1...Sxg6
- 2.Rd7#
- 1...Bxg6
- 1.Sg6+!
FEATURES
- Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 8
- Sets
- Q(b);N_GUARD::P=S
- Q(b);N_GUARD,XR(C)::P=S
- B(c);N_GUARD::PXS(g)=Q
- B(e);N_GUARD::P=S
- S(g);::PXS(h)=Q
- S(g);XP(H)::PXS(h)=Q
- S(h);N_GUARD::R1(C)
- S(h);N_GUARD::R1(C),XS(h)
- Tries
- Try
- Q(A);
- Threat
- QAB(A)
- Vars
- Q(b);N_GUARD,P_SPINQ(b),XP(F)::P=S
- Q(b);N_GUARD,XR(C)::P=S
- B(c);N_GUARD,XQ(A)::PXS(g)=Q
- B(e);N_GUARD,P_PINS(D),XB(E)::P=S
- S(g);P_SPINS(g),XP(F)::PXS(h)=Q
- S(g);XP(H)::PXS(h)=Q
- S(h);OGATE,P_SPINS(h),XP(F)::P=Q
- Q(b);N_GUARD::P=S
- B(c);N_GUARD::PXS(g)=Q
- S(h);N_GUARD::R1(C)
- S(h);N_GUARD::R1(C),XS(h)
- Refutation
- Q(b);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD,XR(C)::P=S
- Q(b);XP(G)::QAB(A)
- B(c);XP(G)::QAB(A)
- B(e);P_PINS(D),XB(E)::QAB1(A)
- S(g);XP(F)::QAB1(A)
- S(g);XP(H)::PXS(h)=Q
- S(h);XP(F)::QAB1(A)
- Q(b);N_GUARD::P=S
- Q(b);::QAB(A)
- Q(b);::QAB1(A)
- R(f);::QAB(A)
- Refutation
- Q(b);XP(F)
- Try
- P(G);XS(g)
- Threat
- DUALS(3)
- Vars
- Q(b);XR(C)::PXS(h)=Q
- R(f);XR(J)::PXS(h)=Q
- B(e);P_PINS(D),XB(E)::R1(G)
- Q(b);::PXS(h)=Q
- Refutation
- B(c);XR(G)
- Try
- Actual
- S(K);CHECK
- Vars
- B(e);N_GUARD,S_CUTS(h),XS(K)::P=S
- S(h);XS(K)::R1(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).