MESON Chess Problem Database
Problem Display
PID: 86501 (1br4N/4p1p1/n2PkP2/1B2p1Q1/2p1N3/7b/3R4/3K4 w - - 0 1)
Melnichenko, Viktor Oleksandrovich
Shakhmaty, 1977
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bf1
- 2.Qg4#
- 1...Bg2
- 2.Qg4#
- 1...Bg4+
- 2.Qxg4#
- 1...Sc7
- 2.Sc5#
- 1...Bf1
- Tries
- 1.Qg6?
- threat
- 2.Sg5#
- 2.fxe7#
- 2.fxg7#
- 2.f7#
- 1...Bg4+
- 2.Qxg4#
- 1...Bxd6
- 2.Sg5#
- 2.fxg7#
- 2.f7#
- 1...exd6
- 2.Sg5#
- 1...exf6
- 2.Sg5#
- 1...gxf6
- 2.Sg5#
- 1...Rf8
- 2.Sg5#
- 2.f7#
- 1...Bf5
- 2.Sg5#
- 2.Qf7#
- 1...Rc6!
- threat
- 1.d7?
- threat
- 2.dxc8Q#
- 2.dxc8B#
- 1...Bg4+
- 2.Qxg4#
- 1...Rxh8
- 2.Bxc4#
- 1...gxf6
- 2.dxc8Q#
- 2.dxc8B#
- 1...Rc5
- 2.d8S#
- 1...Rc6
- 2.d8S#
- 1...Rc7
- 2.d8S#
- 1...Rd8
- 2.Bxc4#
- 1...Re8
- 2.Bxc4#
- 1...Rf8
- 2.Bxc4#
- 1...Rg8
- 2.Bxc4#
- 1...Bf1
- 2.Qg4#
- 2.dxc8Q#
- 2.dxc8B#
- 1...Bg2
- 2.Qg4#
- 2.dxc8Q#
- 2.dxc8B#
- 1...Bf5
- 2.dxc8Q#
- 2.dxc8B#
- 1...Bd6
- 2.dxc8Q#
- 2.dxc8B#
- 1...Ba7
- 2.dxc8Q#
- 2.dxc8B#
- 1...Bc7
- 2.Bxc4#
- 2.dxc8Q#
- 2.dxc8B#
- 1...Sb4
- 2.dxc8Q#
- 2.dxc8B#
- 1...Sc5
- 2.Bxc4#
- 1...Sc7
- 2.Sc5#
- 2.dxc8Q#
- 2.dxc8B#
- 1...c3
- 2.dxc8Q#
- 2.dxc8B#
- 1...g6
- 2.dxc8Q#
- 2.dxc8B#
- 1...exf6!
- threat
- 1.fxe7?
- threat
- 2.Qg6#
- 1...Bg4+
- 2.Qxg4#
- 1...Bxd6
- 2.Rxd6#
- 1...Rc6
- 2.e8Q#
- 1...Rf8
- 2.exf8S#
- 1...g6
- 2.Qf6#
- 2.Qxg6#
- 1...Bf5!
- threat
- 1.fxg7?
- threat
- 2.Qg6#
- 1...Bg4+
- 2.Qxg4#
- 1...exd6
- 2.Qf6#
- 1...Rf8
- 2.gxf8S#
- 1...Bf5
- 2.Qxe7#
- 1...Rc6!
- threat
- 1.f7?
- threat
- 2.Qg6#
- 1...Bg4+
- 2.Qxg4#
- 1...Rc6
- 2.f8S#
- 1...Bf5
- 2.Qxe7#
- 1...g6
- 2.Qxg6#
- 1...exd6!
- threat
- 1.Qg6?
- Keys
- 1.dxe7!
- threat
- 2.Bd7#
- 1...Bg4+
- 2.Qxg4#
- 1...Rxh8
- 2.Bxc4#
- 1...gxf6
- 2.Qxf6#
- 1...Rc6
- 2.e8Q#
- 2.e8R#
- 1...Rc7
- 2.Rd6#
- 1...Rd8
- 2.exd8S#
- 1...Bd6
- 2.Rxd6#
- 1...Sc5
- 2.Bxc4#
- threat
- 1.dxe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 3
- Sets
- B(a);N_GUARD::QAB(E)
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- S(d);N_GUARD,S_CUTR(i)::S(C)
- Tries
- Try
- Q(E);
- Threat
- DUALS(4)
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- P(f);XP(F)::S(C)
- P(f);P_SPINP(f),XP(G)::S(C)
- P(g);P_SPINP(g),XP(G)::S(C)
- Refutation
- R(i);
- Try
- P(F);
- Threat
- PXR(i)=Q
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- R(i);N_GUARD,XS(H)::B(D),XP(b)
- P(g);XP(G)::PXR(i)=Q
- R(i);N_GUARD::P=S
- R(i);N_GUARD::B(D),XP(b)
- B(a);::PXR(i)=Q
- B(h);::PXR(i)=Q
- S(d);::PXR(i)=Q
- S(d);S_CUTR(i)::B(D),XP(b)
- P(b);::PXR(i)=Q
- P(g);::PXR(i)=Q
- Refutation
- P(f);XP(G)
- Try
- P(G);XP(f)
- Threat
- QAR2(E)
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- B(h);OGATE,XP(F)::R1(B),XB(h)
- R(i);N_GUARD::P=Q
- R(i);OGATE::PXR(i)=S
- Refutation
- B(a);
- Try
- P(G);XP(g)
- Threat
- QAR2(E)
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- P(f);N_GUARD,XP(F)::QAR1(E)
- R(i);OGATE::PXR(i)=S
- B(a);SBLOCK::QAR1(E),XP(f)
- Refutation
- R(i);
- Try
- P(G);
- Threat
- QAR2(E)
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- R(i);N_GUARD::P=S
- B(a);SBLOCK::QAR1(E),XP(f)
- P(g);::QAR2(E),XP(g)
- Refutation
- P(f);XP(F)
- Try
- Actual
- P(F);XP(f)
- Threat
- B(D)
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- R(i);N_GUARD,XS(H)::B(D),XP(b)
- P(g);OGATE,XP(G)::QAR1(E),XP(g)
- R(i);N_GUARD::P=Q
- R(i);S_CUTB(h)::R1(B)
- R(i);OGATE,P_PINR(B)::PXR(i)=S
- B(h);N_GUARD::R1(B),XB(h)
- S(d);S_CUTR(i)::B(D),XP(b)
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).