MESON Chess Problem Database
Problem Display
PID: 180521 (3Q4/3PpP2/1p1R1BP1/1Rn2kPB/4p3/4K3/8/8 w - - 0 1)
Lider, Valentin Viktorovich
Problemas, 1991
#2
10 + 5
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...exf6
- 2.Qxf6#
- 1...exf6
- Tries
- 1.Bg4+?
- 1...Kxg6
- 2.Qg8#
- 1...Kxg4!
- 1...Kxg6
- 1.Ba1?
- 1...exd6
- 2.Qf6#
- 1...e5
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...e6
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...Kxg5!
- 1...exd6
- 1.Bb2?
- 1...exd6
- 2.Qf6#
- 1...e5
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...e6
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...Kxg5!
- 1...exd6
- 1.Bc3?
- 1...exd6
- 2.Qf6#
- 1...e5
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...e6
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...Kxg5!
- 1...exd6
- 1.Bd4?
- 1...exd6
- 2.Qf6#
- 1...e5
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...e6
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...Kxg5!
- 1...exd6
- 1.Bg7?
- 1...exd6
- 2.Qf6#
- 1...e5
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...e6
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...Kxg5!
- 1...exd6
- 1.Bh8?
- 1...exd6
- 2.Qf6#
- 1...e5
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...e6
- 2.Qf6#
- 2.f8Q#
- 2.f8R#
- 1...Kxg5!
- 1...exd6
- 1.Rxc5+?
- 1...e5
- 2.Rxe5#
- 1...bxc5!
- 1...e5
- 1.Rd1?
- 1...Ke6
- 2.Bg4#
- 1...exf6
- 2.Qxf6#
- 1...e6
- 2.Rf1#
- 1...e5!
- 1...Ke6
- 1.Rd2?
- 1...Ke6
- 2.Bg4#
- 1...exf6
- 2.Qxf6#
- 1...e6
- 2.Rf2#
- 1...e5!
- 1...Ke6
- 1.Rd5+?
- 1...e5
- 2.Rxe5#
- 1...Ke6!
- 1...e5
- 1.Re6?
- threat
- 2.Re5#
- 1...exf6
- 2.Qxf6#
- 1...Kxe6!
- threat
- 1.Qa8?
- threat
- 2.Qxe4#
- 1...exf6
- 2.Qd5#
- 1...e5!
- threat
- 1.f8Q?
- 1...exf6
- 2.Qdxf6#
- 2.Qfxf6#
- 1...e5
- 2.Be7#
- 2.Bg7#
- 2.Bh8#
- 1...e6
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bg7#
- 2.Bh8#
- 1...exd6!
- 1...exf6
- 1.f8R?
- 1...exf6
- 2.Qxf6#
- 1...e5
- 2.Be7#
- 2.Bg7#
- 2.Bh8#
- 1...e6
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bg7#
- 2.Bh8#
- 1...exd6!
- 1...exf6
- 1.Bg4+?
- Keys
- 1.Qe8!
- 1...exd6
- 2.Qxe4#
- 1...exf6
- 2.Rd5#
- 1...e5
- 2.Qxe5#
- 1...e6
- 2.Qxe6#
- 1...exd6
- 1.Qe8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- P(e);OGATE,XB(F)::QAR1(J),XP(e)
- Tries
- Try
- B(D);CHECK
- Vars
- K(c);N_SPINS(b),S_FLIGHT,XP(G)::QAR2(J)
- Refutation
- K(c);N_SPINS(b),S_FLIGHT,XB(D)
- Try
- B(F);
- Vars
- P(e);OGATE,XR(E)::QAR1(J)
- Refutation
- K(c);P-FLIGHT,P_SPINP(e),XP(C)
- Try
- B(F);
- Vars
- P(e);OGATE,XR(E)::QAR1(J)
- Refutation
- K(c);P-FLIGHT,P_SPINP(e),XP(C)
- Try
- B(F);
- Vars
- P(e);OGATE,XR(E)::QAR1(J)
- Refutation
- K(c);P-FLIGHT,P_SPINP(e),XP(C)
- Try
- B(F);
- Vars
- P(e);OGATE,XR(E)::QAR1(J)
- Refutation
- K(c);P-FLIGHT,P_SPINP(e),XP(C)
- Try
- B(F);
- Vars
- P(e);OGATE,XR(E)::QAR1(J)
- Refutation
- K(c);P-FLIGHT,P_SPINP(e),XP(C)
- Try
- B(F);
- Vars
- P(e);OGATE,XR(E)::QAR1(J)
- Refutation
- K(c);P-FLIGHT,P_SPINP(e),XP(C)
- Try
- R(B);CHECK,XS(b)
- Vars
- P(e);P_SPINP(e)::R1(B),XP(e)
- Refutation
- P(d);XR(B)
- Try
- R(E);
- Vars
- K(c);N_SPINS(b),S_FLIGHT::B(D)
- P(e);OGATE,XB(F)::QAR1(J),XP(e)
- P(e);SBLOCK::R(E)
- Refutation
- P(e);N_SPINS(b)
- Try
- R(E);
- Vars
- K(c);N_SPINS(b),S_FLIGHT::B(D)
- P(e);OGATE,XB(F)::QAR1(J),XP(e)
- P(e);SBLOCK::R(E)
- Refutation
- P(e);N_SPINS(b)
- Try
- R(E);CHECK,N_PINS(b)
- Vars
- P(e);P_SPINP(e)::R1(E),XP(e)
- Refutation
- K(c);S_FLIGHT
- Try
- R(E);
- Threat
- R1(E)
- Vars
- P(e);OGATE,XB(F)::QAR1(J),XP(e)
- Refutation
- K(c);N_SPINS(b),S_FLIGHT,XR(E)
- Try
- Q(J);
- Threat
- QAB1(J),XP(a)
- Vars
- P(e);N_GUARD,XB(F)::QAR2(J)
- Refutation
- P(e);N_SPINS(b)
- Try
- P(I);
- Refutation
- P(e);XR(E)
- Try
- P(I);
- Vars
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(J),XP(e)
- Refutation
- P(e);XR(E)
- Try
- Actual
- Q(J);
- Vars
- P(e);OGATE,XR(E)::QAB1(J),XP(a)
- P(e);N_GUARD,XB(F)::R(E)
- P(e);N_SPINS(b),OGATE::QAR1(J),XP(e)
- P(e);OGATE::QAB1(J),XP(e)
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).