MESON Chess Problem Database
Problem Display
PID: 75609 (BrR1Rr2/1P3PP1/3p3p/pp1k2PP/P7/PKP5/QNNp4/bn1b4 w - - 0 1)
Ferron de la Fuente, Ernesto
The Problemist, 2007
#2
15 + 11
SOLUTION
- SOUND
- Sets
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rxc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Rg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bxb2
- 2.Kxb2#
- 1...Bxc2+
- 2.Kxc2#
- 1...Be2
- 2.Se3#
- 1...Bf3
- 2.Se3#
- 1...Bg4
- 2.Se3#
- 1...Bxh5
- 2.Se3#
- 1...Sxa3
- 2.Kxa3#
- 1...Sxc3
- 2.Kxc3#
- 1...bxa4+
- 2.Kxa4#
- 1...b4
- 2.c4#
- 1...Rxb7
- Tries
- 1.Sxd1?
- threat
- 2.Sde3#
- 2.Sce3#
- 1...bxa4+
- 2.Kxa4#
- 1...Rxc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Bxc3
- 2.Sde3#
- 1...Sxc3
- 2.Sde3#
- 1...Rxe8!
- threat
- 1.axb5?
- threat
- 2.Ka4#
- 2.c4#
- 1...Bxc2+
- 2.Kxc2#
- 1...a4+
- 2.Kxa4#
- 2.Kb4#
- 1...Rxc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sxa3
- 2.Kxa3#
- 1...Sxc3
- 2.Kxc3#
- 1...Be2
- 2.Se3#
- 1...Rxe8!
- threat
- 1.gxf8Q?
- 1...Bxc2+
- 2.Kxc2#
- 1...bxa4+
- 2.Kxa4#
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rxc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Bxb2
- 2.Kxb2#
- 1...Bxh5
- 2.Se3#
- 1...Sxa3
- 2.Kxa3#
- 1...Sxc3
- 2.Kxc3#
- 1...Be2
- 2.Se3#
- 1...Bf3
- 2.Se3#
- 1...Bg4
- 2.Se3#
- 1...b4
- 2.c4#
- 1...hxg5!
- 1...Bxc2+
- 1.gxf8S?
- 1...Bxc2+
- 2.Kxc2#
- 1...bxa4+
- 2.Kxa4#
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rxc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Bxb2
- 2.Kxb2#
- 1...Bxh5
- 2.Se3#
- 1...Sxa3
- 2.Kxa3#
- 1...Sxc3
- 2.Kxc3#
- 1...Be2
- 2.Se3#
- 1...Bf3
- 2.Se3#
- 1...Bg4
- 2.Se3#
- 1...b4
- 2.c4#
- 1...hxg5!
- 1...Bxc2+
- 1.gxf8B?
- 1...Bxc2+
- 2.Kxc2#
- 1...bxa4+
- 2.Kxa4#
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rxc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Bxb2
- 2.Kxb2#
- 1...Bxh5
- 2.Se3#
- 1...Sxa3
- 2.Kxa3#
- 1...Sxc3
- 2.Kxc3#
- 1...Be2
- 2.Se3#
- 1...Bf3
- 2.Se3#
- 1...Bg4
- 2.Se3#
- 1...b4
- 2.c4#
- 1...hxg5!
- 1...Bxc2+
- 1.gxf8R?
- 1...Bxc2+
- 2.Kxc2#
- 1...bxa4+
- 2.Kxa4#
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rxc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Bxb2
- 2.Kxb2#
- 1...Bxh5
- 2.Se3#
- 1...Sxa3
- 2.Kxa3#
- 1...Sxc3
- 2.Kxc3#
- 1...Be2
- 2.Se3#
- 1...Bf3
- 2.Se3#
- 1...Bg4
- 2.Se3#
- 1...b4
- 2.c4#
- 1...hxg5!
- 1...Bxc2+
- 1.g8B?
- 1...Bxc2+
- 2.Kxc2#
- 1...bxa4+
- 2.Kxa4#
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rxc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Rxf7
- 2.Bxf7#
- 1...Rxe8
- 2.fxe8Q#
- 2.fxe8R#
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bxb2
- 2.Kxb2#
- 1...Bxh5
- 2.Se3#
- 1...Sxa3
- 2.Kxa3#
- 1...Sxc3
- 2.Kxc3#
- 1...Be2
- 2.Se3#
- 1...Bf3
- 2.Se3#
- 1...Bg4
- 2.Se3#
- 1...b4
- 2.c4#
- 1...hxg5!
- 1...Bxc2+
- 1.Sxd1?
- Keys
- 1.g8Q!
- 1...Bxc2+
- 2.Kxc2#
- 1...bxa4+
- 2.Kxa4#
- 1...Rxb7
- 2.Bxb7#
- 1...Rxa8
- 2.bxa8Q#
- 2.bxa8B#
- 1...Rxc8
- 2.bxc8Q#
- 2.bxc8R#
- 1...Rxf7
- 2.Qxf7#
- 1...Rxe8
- 2.fxe8Q#
- 2.fxe8R#
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bxb2
- 2.Kxb2#
- 1...Bxh5
- 2.Se3#
- 1...Sxa3
- 2.Kxa3#
- 1...Sxc3
- 2.Kxc3#
- 1...hxg5
- 2.Qxg5#
- 1...Be2
- 2.Se3#
- 1...Bf3
- 2.Se3#
- 1...Bg4
- 2.Se3#
- 1...b4
- 2.c4#
- 1...Bxc2+
- 1.g8Q!
This is after 87676
After a problem by A Dobrila.
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(j);OGATE,P_SPINR(j),XP(J)::B(M),XR(j)
- R(j);OGATE,XB(M)::PXR(j)=Q
- R(j);OGATE,XR(N)::PXR(j)=Q
- R(k);OGATE::PXR(k)=Q
- B(a);XS(B)::QAB(A)+K(E),XB(a)
- B(c);CHECK,XS(C)::QAB(A)+K(E),XB(c)
- B(c);N_PINS(C)::S(C)
- B(c);N_PINS(C),XP(I)::S(C)
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);XP(F)::QAB(A)+K(E),XS(b)
- P(f);CHECK,P_PINP(J),XP(G)::QAB(A)+K(E),XP(f)
- P(f);N_GUARD::P(F)
- Tries
- Try
- S(B);N_SPINS(C),XB(c)
- Threat
- DUALS(2)
- Vars
- P(f);CHECK,P_PINP(J),XP(G)::QAB(A)+K(E),XP(f)
- R(j);OGATE,XR(N)::PXR(j)=Q
- B(a);XP(F)::S(B)
- S(b);XP(F)::S(B)
- Refutation
- R(k);XR(O)
- Try
- P(G);XP(f)
- Threat
- DUALS(2)
- Vars
- B(c);CHECK,XS(C)::QAB(A)+K(E),XB(c)
- R(j);OGATE,XR(N)::PXR(j)=Q
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);XP(F)::QAB(A)+K(E),XS(b)
- B(c);N_PINS(C)::S(C)
- Refutation
- R(k);XR(O)
- Try
- P(L);XR(k)
- Vars
- B(c);CHECK,XS(C)::QAB(A)+K(E),XB(c)
- P(f);CHECK,P_PINP(J),XP(G)::QAB(A)+K(E),XP(f)
- R(j);OGATE,P_SPINR(j),XP(J)::B(M),XR(j)
- R(j);OGATE,XB(M)::PXR(j)=Q
- R(j);OGATE,XR(N)::PXR(j)=Q
- B(a);XS(B)::QAB(A)+K(E),XB(a)
- B(c);N_PINS(C),XP(I)::S(C)
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);XP(F)::QAB(A)+K(E),XS(b)
- B(c);N_PINS(C)::S(C)
- P(f);N_GUARD::P(F)
- Refutation
- P(i);XP(H)
- Try
- P(L);XR(k)
- Vars
- B(c);CHECK,XS(C)::QAB(A)+K(E),XB(c)
- P(f);CHECK,P_PINP(J),XP(G)::QAB(A)+K(E),XP(f)
- R(j);OGATE,P_SPINR(j),XP(J)::B(M),XR(j)
- R(j);OGATE,XB(M)::PXR(j)=Q
- R(j);OGATE,XR(N)::PXR(j)=Q
- B(a);XS(B)::QAB(A)+K(E),XB(a)
- B(c);N_PINS(C),XP(I)::S(C)
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);XP(F)::QAB(A)+K(E),XS(b)
- B(c);N_PINS(C)::S(C)
- P(f);N_GUARD::P(F)
- Refutation
- P(i);XP(H)
- Try
- P(L);XR(k)
- Vars
- B(c);CHECK,XS(C)::QAB(A)+K(E),XB(c)
- P(f);CHECK,P_PINP(J),XP(G)::QAB(A)+K(E),XP(f)
- R(j);OGATE,P_SPINR(j),XP(J)::B(M),XR(j)
- R(j);OGATE,XB(M)::PXR(j)=Q
- R(j);OGATE,XR(N)::PXR(j)=Q
- B(a);XS(B)::QAB(A)+K(E),XB(a)
- B(c);N_PINS(C),XP(I)::S(C)
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);XP(F)::QAB(A)+K(E),XS(b)
- B(c);N_PINS(C)::S(C)
- P(f);N_GUARD::P(F)
- Refutation
- P(i);XP(H)
- Try
- P(L);XR(k)
- Vars
- B(c);CHECK,XS(C)::QAB(A)+K(E),XB(c)
- P(f);CHECK,P_PINP(J),XP(G)::QAB(A)+K(E),XP(f)
- R(j);OGATE,P_SPINR(j),XP(J)::B(M),XR(j)
- R(j);OGATE,XB(M)::PXR(j)=Q
- R(j);OGATE,XR(N)::PXR(j)=Q
- B(a);XS(B)::QAB(A)+K(E),XB(a)
- B(c);N_PINS(C),XP(I)::S(C)
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);XP(F)::QAB(A)+K(E),XS(b)
- B(c);N_PINS(C)::S(C)
- P(f);N_GUARD::P(F)
- Refutation
- P(i);XP(H)
- Try
- P(L);
- Vars
- B(c);CHECK,XS(C)::QAB(A)+K(E),XB(c)
- P(f);CHECK,P_PINP(J),XP(G)::QAB(A)+K(E),XP(f)
- R(j);OGATE,P_SPINR(j),XP(J)::B(M),XR(j)
- R(j);OGATE,XB(M)::PXR(j)=Q
- R(j);OGATE,XR(N)::PXR(j)=Q
- R(k);OGATE,P_SPINR(k),XP(K)::B(L),XR(k)
- R(k);OGATE,XR(O)::PXR(k)=Q
- R(k);OGATE,XB(L)::PXR(k)=Q
- B(a);XS(B)::QAB(A)+K(E),XB(a)
- B(c);N_PINS(C),XP(I)::S(C)
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);XP(F)::QAB(A)+K(E),XS(b)
- B(c);N_PINS(C)::S(C)
- P(f);N_GUARD::P(F)
- Refutation
- P(i);XP(H)
- Try
- Actual
- P(L);
- Vars
- B(c);CHECK,XS(C)::QAB(A)+K(E),XB(c)
- P(f);CHECK,P_PINP(J),XP(G)::QAB(A)+K(E),XP(f)
- R(j);OGATE,P_SPINR(j),XP(J)::B(M),XR(j)
- R(j);OGATE,XB(M)::PXR(j)=Q
- R(j);OGATE,XR(N)::PXR(j)=Q
- R(k);OGATE,P_SPINR(k),XP(K)::QAB(L),XR(k)
- R(k);OGATE,XR(O)::PXR(k)=Q
- R(k);OGATE,XQ(L)::PXR(k)=Q
- B(a);XS(B)::QAB(A)+K(E),XB(a)
- B(c);N_PINS(C),XP(I)::S(C)
- S(b);XP(D)::QAB(A)+K(E),XS(b)
- S(b);XP(F)::QAB(A)+K(E),XS(b)
- P(i);OGATE,XP(H)::QAR(L),XP(i)
- B(c);N_PINS(C)::S(C)
- P(f);N_GUARD::P(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).