MESON Chess Problem Database
Problem Display
PID: 146074 (2R2BB1/1P3P1R/4k2P/r1p4K/b1Pb2N1/3Q4/8/8 w - - 0 1)
Ducak, Jan
The Problemist, 2011
#2
11 + 5
SOLUTION
- SOUND
- Sets
- 1...Kd7
- 2.Qf5#
- 1...Be8
- 2.fxe8Q#
- 2.fxe8S#
- 2.fxe8B#
- 2.fxe8R#
- 1...Ba1
- 2.Qd5#
- 1...Bg1
- 2.Qd5#
- 1...Bb2
- 2.Qd5#
- 1...Bf2
- 2.Qd5#
- 1...Bc3
- 2.Qd5#
- 1...Be3
- 2.Qd5#
- 1...Bf6
- 2.Qd5#
- 1...Bg7
- 2.Qd5#
- 1...Bh8
- 2.Qd5#
- 1...Kd7
- Tries
- 1.Kg6?
- threat
- 2.Qf5#
- 1...Kd7
- 2.Qf5#
- 1...Bc2!
- threat
- 1.Bxc5?
- threat
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Kd7
- 2.Qf5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bxc5
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Rb5
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Ra6
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Ra7
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Ra8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bd1
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bc2
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bb3
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bb5
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bc6
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bd7
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Be8
- 2.fxe8Q#
- 2.fxe8S#
- 2.fxe8B#
- 2.fxe8R#
- 1...Ba1
- 2.Qd5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bg1
- 2.Qd5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bb2
- 2.Qd5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bf2
- 2.Qd5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bc3
- 2.Qd5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Be3
- 2.Qd5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Be5
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bf6
- 2.Qd5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bg7
- 2.Qd5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bh8
- 2.Qd5#
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Rxc5+!
- threat
- 1.Bd6?
- threat
- 2.f8Q#
- 2.f8B#
- 1...Kxd6
- 2.f8Q#
- 2.f8B#
- 1...Rb5
- 2.f8Q#
- 2.f8B#
- 1...Ra6
- 2.f8Q#
- 2.f8B#
- 1...Ra7
- 2.f8Q#
- 2.f8B#
- 1...Ra8
- 2.f8Q#
- 2.f8B#
- 1...Bd1
- 2.f8Q#
- 2.f8B#
- 1...Bc2
- 2.f8Q#
- 2.f8B#
- 1...Bb3
- 2.f8Q#
- 2.f8B#
- 1...Bb5
- 2.f8Q#
- 2.f8B#
- 1...Bc6
- 2.f8Q#
- 2.f8B#
- 1...Bd7
- 2.f8Q#
- 2.f8B#
- 1...Be8
- 2.fxe8S#
- 1...Ba1
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bg1
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bb2
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bf2
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bc3
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Be3
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Be5
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bf6
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bh8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Kd7!
- threat
- 1.Re8+?
- 1...Bxe8
- 2.fxe8Q#
- 2.fxe8S#
- 2.fxe8B#
- 2.fxe8R#
- 1...Kd7!
- 1...Bxe8
- 1.Qe4+?
- 1...Kd7
- 2.Qd5#
- 2.Qf5#
- 2.Qe7#
- 2.Qe8#
- 1...Be5!
- 1...Kd7
- 1.Qg6+?
- 1...Kd7
- 2.Qf5#
- 2.Qd6#
- 1...Bf6!
- 1...Kd7
- 1.b8Q?
- threat
- 2.Qd6#
- 1...Kd7
- 2.Qf5#
- 1...Be5
- 2.Qxe5#
- 1...Ra6!
- threat
- 1.Kg6?
- Keys
- 1.Be7!
- threat
- 2.f8S#
- 1...Kd7
- 2.f8S#
- 1...Kxe7
- 2.f8Q#
- 2.f8B#
- 1...Bd7
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Be8
- 2.fxe8Q#
- 2.fxe8B#
- 1...Ba1
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bg1
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bb2
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bf2
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bc3
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Be3
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Be5
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bf6
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- 1...Bg7
- 2.f8Q#
- 2.f8B#
- 1...Bh8
- 2.f8Q#
- 2.f8S#
- 2.f8B#
- 2.f8R#
- threat
- 1.Be7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- K(e);P_SPINB(b),S_FLIGHT::QAB(A)
- B(b);OGATE::QAB1(A)
- Tries
- Try
- K(D);S_FLIGHT
- Threat
- QAB1(A)
- Vars
- K(e);P_SPINB(b),S_FLIGHT::QAB(A)
- Refutation
- B(a);P_PINQ(A)
- Try
- B(J);P_SPINB(J),XP(d)
- Threat
- DUALS(4)
- Refutation
- R(c);CHECK,XB(J)
- Try
- B(J);
- Threat
- P=Q
- Vars
- K(e);P-FLIGHT,P_SPINB(b),XB(J)::P=Q
- R(c);::P=Q
- B(a);P_PINS(C)::P=Q
- B(a);::P=Q
- B(a);OGATE,P_PINP(G)::PXB(a)=S
- Refutation
- K(e);S_FLIGHT
- Try
- R(I);CHECK
- Refutation
- K(e);P_SPINB(b),S_FLIGHT
- Try
- Q(A);CHECK
- Refutation
- B(b);P_SPINB(b)
- Try
- Q(A);CHECK
- Refutation
- B(b);P_SPINB(b)
- Try
- P(F);
- Threat
- QAR1(F)
- Vars
- K(e);P_SPINB(b),S_FLIGHT::QAB(A)
- B(b);N_GUARD::QAR1(F),XB(b)
- Refutation
- R(c);
- Try
- Actual
- B(J);
- Threat
- P=S
- Vars
- K(e);P_SPINB(b),S_FLIGHT::P=S
- K(e);P-FLIGHT,XB(J)::P=Q
- B(a);OGATE,P_PINP(G)::PXB(a)=Q
- B(b);::P=Q
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).