MESON Chess Problem Database
Problem Display
PID: 157881 (4R1b1/5p2/2Np1P2/4p1B1/4k3/2r1N1r1/2P1R1PK/1B5Q w - - 0 1)
Juricek, Stanislav
Best Problems, 2009
#2
11 + 7
SOLUTION
- SOUND
- Sets
- 1...Rxc2
- 2.Bxc2#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rcxe3
- 2.c4#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rxc6
- 2.c3#
- 1...Rxg2+
- 2.Qxg2#
- 1...Rgxe3
- 2.g4#
- 1...Rf3
- 2.gxf3#
- 1...Rh3+
- 2.gxh3#
- 1...Rg4
- 2.g3#
- 1...Rxg5
- 2.g3#
- 1...d5
- 2.Rxe5#
- 1...Rxc2
- Tries
- 1.Kxg3?
- threat
- 2.Qh4#
- 1...Rxc2
- 2.Bxc2#
- 1...Rxe3+!
- threat
- 1.Bh6?
- 1...Rxg2+
- 2.Qxg2#
- 1...Rh3+
- 2.gxh3#
- 1...Rxc2
- 2.Bxc2#
- 1...Rcxe3
- 2.c4#
- 1...Rxc6
- 2.c3#
- 1...Rgxe3
- 2.g4#
- 1...Rg5
- 2.g3#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rf3
- 2.gxf3#
- 1...Rg4
- 2.g3#
- 1...Rg6
- 2.g3#
- 2.g4#
- 1...Rg7
- 2.g3#
- 2.g4#
- 1...d5
- 2.Rxe5#
- 1...Bh7!
- 1...Rxg2+
- 1.Re1?
- 1...Rxg2+
- 2.Qxg2#
- 1...Rh3+
- 2.gxh3#
- 1...Rxc2
- 2.Bxc2#
- 1...Rcxe3
- 2.c4#
- 1...Rxc6
- 2.c3#
- 1...Rgxe3
- 2.g4#
- 1...Rxg5
- 2.g3#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rf3
- 2.gxf3#
- 1...Rg4
- 2.g3#
- 1...d5
- 2.Rxe5#
- 1...Bh7!
- 1...Rxg2+
- 1.Re7?
- 1...Rxg2+
- 2.Qxg2#
- 1...Rh3+
- 2.gxh3#
- 1...Rxc2
- 2.Bxc2#
- 1...Rcxe3
- 2.c4#
- 1...Rxc6
- 2.c3#
- 1...Rgxe3
- 2.g4#
- 1...Rxg5
- 2.g3#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rf3
- 2.gxf3#
- 1...Rg4
- 2.g3#
- 1...d5
- 2.Rxe5#
- 1...Bh7!
- 1...Rxg2+
- 1.Rxg8?
- 1...Rxg2+
- 2.Qxg2#
- 1...Rh3+
- 2.gxh3#
- 1...Rxc2
- 2.Bxc2#
- 1...Rcxe3
- 2.c4#
- 1...Rxc6
- 2.c3#
- 1...Rgxe3
- 2.g4#
- 1...Rxg5
- 2.g3#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rf3
- 2.gxf3#
- 1...Rg4
- 2.g3#
- 1...d5!
- 1...Rxg2+
- 1.Qf1?
- threat
- 2.Qf4#
- 2.Qf5#
- 1...Rxg2+
- 2.Qxg2#
- 1...Rxc2
- 2.Bxc2#
- 2.Qf5#
- 1...Rcxe3
- 2.c4#
- 1...Rxc6
- 2.Qf4#
- 2.c3#
- 1...Rgxe3
- 2.Qf3#
- 1...Rxg5
- 2.Qf3#
- 1...Bh7
- 2.Qf4#
- 1...Rf3
- 2.Qxf3#
- 2.gxf3#
- 1...Rg4
- 2.Qf3#
- 2.Qf5#
- 1...Rh3+!
- threat
- 1.Kxg3?
- Keys
- 1.Kg1!
- 1...Rxg2+
- 2.Qxg2#
- 1...Rxc2
- 2.Bxc2#
- 1...Rcxe3
- 2.c4#
- 1...Rxc6
- 2.c3#
- 1...Rgxe3
- 2.g4#
- 1...Rxg5
- 2.g3#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Rc5
- 2.c3#
- 2.c4#
- 1...Rf3
- 2.gxf3#
- 1...Rh3
- 2.gxh3#
- 1...Rg4
- 2.g3#
- 1...Bh7
- 2.Qxh7#
- 1...d5
- 2.Rxe5#
- 1...Rxg2+
- 1.Kg1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(a);OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
- R(a);OGATE::B(A)+P(C)
- R(a);OGATE::B(A)+P(C),XR(a)
- R(a);OGATE::P(C),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::B(A)+P(C)
- R(a);OGATE,XS(I)::B(A)+P(C)
- R(b);CHECK,OGATE,P_SPINR(b),XP(E)::QAB(B),XR(b)
- R(b);OGATE,P_SPINR(b),XS(G)::QAB(B)+P(E)
- R(b);OGATE::P(E),XR(b)
- R(b);CHECK,OGATE::QAB(B)+P(E),XR(b)
- R(b);OGATE::QAB(B)+P(E)
- R(b);OGATE,XB(H)::QAB(B)+P(E)
- P(e);N_GUARD::R1(K),XP(d)
- Tries
- Try
- K(F);P_SPINS(G),S_FLIGHT,XR(b)
- Threat
- QAR(B)
- Vars
- R(a);N_PINS(G),OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
- Refutation
- R(a);CHECK,P_SPINR(a),XS(G)
- Try
- B(H);
- Vars
- R(b);CHECK,OGATE,P_SPINR(b),XP(E)::QAB(B),XR(b)
- R(b);CHECK,OGATE::QAB(B)+P(E),XR(b)
- R(a);OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::B(A)+P(C)
- R(a);OGATE,XS(I)::B(A)+P(C)
- R(b);OGATE,P_SPINR(b),XS(G)::QAB(B)+P(E)
- R(b);OGATE::QAB(B)+P(E)
- R(a);OGATE::B(A)+P(C)
- R(a);OGATE::B(A)+P(C),XR(a)
- R(a);OGATE::P(C),XR(a)
- R(b);OGATE::P(E),XR(b)
- P(e);N_GUARD::R1(K),XP(d)
- Refutation
- B(g);
- Try
- R(D);
- Vars
- R(b);CHECK,OGATE,P_SPINR(b),XP(E)::QAB(B),XR(b)
- R(b);CHECK,OGATE::QAB(B)+P(E),XR(b)
- R(a);OGATE,P_PINP(E),P_SPINR(a),XP(C)::B(A),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::B(A)+P(C)
- R(a);OGATE,XS(I)::B(A)+P(C)
- R(b);OGATE,P_SPINR(b),XS(G)::QAB(B)+P(E)
- R(b);OGATE,XB(H)::QAB(B)+P(E)
- R(a);OGATE::B(A)+P(C)
- R(a);OGATE::B(A)+P(C),XR(a)
- R(a);OGATE::P(C),XR(a)
- R(b);OGATE::P(E),XR(b)
- R(b);OGATE::QAB(B)+P(E)
- P(e);N_GUARD::R1(K),XP(d)
- Refutation
- B(g);
- Try
- R(K);
- Vars
- R(b);CHECK,OGATE,P_SPINR(b),XP(E)::QAB(B),XR(b)
- R(b);CHECK,OGATE::QAB(B)+P(E),XR(b)
- R(a);OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::B(A)+P(C)
- R(a);OGATE,XS(I)::B(A)+P(C)
- R(b);OGATE,P_SPINR(b),XS(G)::QAB(B)+P(E)
- R(b);OGATE,XB(H)::QAB(B)+P(E)
- R(a);OGATE::B(A)+P(C)
- R(a);OGATE::B(A)+P(C),XR(a)
- R(a);OGATE::P(C),XR(a)
- R(b);OGATE::P(E),XR(b)
- R(b);OGATE::QAB(B)+P(E)
- P(e);N_GUARD::R1(K),XP(d)
- Refutation
- B(g);
- Try
- R(K);N_PINP(d),XB(g)
- Vars
- R(b);CHECK,OGATE,P_SPINR(b),XP(E)::QAB(B),XR(b)
- R(b);CHECK,OGATE::QAB(B)+P(E),XR(b)
- R(a);OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::B(A)+P(C)
- R(a);OGATE,XS(I)::B(A)+P(C)
- R(b);OGATE,P_SPINR(b),XS(G)::QAB(B)+P(E)
- R(b);OGATE,XB(H)::QAB(B)+P(E)
- R(a);OGATE::B(A)+P(C)
- R(a);OGATE::B(A)+P(C),XR(a)
- R(a);OGATE::P(C),XR(a)
- R(b);OGATE::P(E),XR(b)
- R(b);OGATE::QAB(B)+P(E)
- Refutation
- P(e);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,OGATE,XP(E)::QAB(B),XR(b)
- R(a);OGATE,P_SPINR(a),XS(G)::B(A)+P(C)
- R(b);N_GUARD,P_SPINR(b),XS(G)::QAB1(B)
- R(b);N_GUARD,XB(H)::QAB1(B)
- B(g);::QAR1(B)
- Refutation
- R(b);CHECK
- Try
- Actual
- K(F);P_SPINP(E),S_FLIGHT
- Vars
- R(b);CHECK,OGATE,P_SPINR(b),XP(E)::QAB(B),XR(b)
- R(a);OGATE,P_SPINR(a),XP(C)::B(A),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::B(A)+P(C)
- R(a);OGATE,XS(I)::B(A)+P(C)
- R(b);N_PINP(E),P_SPINR(b),XS(G)::QAB(B)+P(E)
- R(b);XB(H)::QAB(B)+P(E)
- R(a);OGATE::B(A)+P(C)
- R(a);OGATE::B(A)+P(C),XR(a)
- R(a);OGATE::P(C),XR(a)
- R(b);N_PINP(E)::P(E),XR(b)
- R(b);N_PINP(E)::QAB(B)+P(E),XR(b)
- R(b);::QAB(B)+P(E)
- B(g);N_GUARD::QAB(B),XB(g)
- P(e);N_GUARD::R1(K),XP(d)
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).