MESON Chess Problem Database
Problem Display
PID: 265258 (2nQ4/1RK4B/3pbB2/2pk1n2/r2N4/1P2bP2/2PRP3/qN6 w - - 0 1)
Blasco, Salvador
Coello-75 JT (Problemas), 2017
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Qc3
- 2.Sxc3#
- 1...Qxd4
- 2.Sc3#
- 1...Qa2
- 2.Sc3#
- 1...Qa3
- 2.Sc3#
- 1...Ra2
- 2.c4#
- 1...Ra3
- 2.c4#
- 1...Rxd4
- 2.c4#
- 1...Ra5
- 2.c4#
- 1...Ra6
- 2.c4#
- 1...Ra7
- 2.c4#
- 1...Ra8
- 2.c4#
- 1...Bg1
- 2.e4#
- 1...Bxd2
- 2.e4#
- 1...Bf2
- 2.e4#
- 1...Bxd4
- 2.e4#
- 1...Bf4
- 2.e4#
- 1...Bg5
- 2.e4#
- 1...Bh6
- 2.e4#
- 1...Bg8
- 2.Bxg8#
- 2.Qxg8#
- 1...Sxd4
- 2.Be4#
- 1...Sh4
- 2.Be4#
- 1...Sh6
- 2.Be4#
- 1...Sfe7
- 2.Be4#
- 1...Sg7
- 2.Be4#
- 1...cxd4
- 2.Rb5#
- 1...c4
- 2.Rb5#
- 1...Qc3
- Tries
- 1.Sb5+?
- 1...Qd4
- 2.S1c3#
- 2.S5c3#
- 1...Rd4
- 2.c4#
- 1...Bd4
- 2.e4#
- 1...Sd4
- 2.Be4#
- 1...Bxd2!
- 1...Qd4
- 1.Sxf5+?
- 1...Qd4
- 2.Sc3#
- 2.Sxe3#
- 1...Rd4
- 2.Sxe3#
- 2.c4#
- 1...Bd4
- 2.Se3#
- 2.e4#
- 1...Bxd2!
- 1...Qd4
- 1.Sc6+?
- 1...Qd4
- 2.Sc3#
- 1...Rd4
- 2.c4#
- 1...Bd4
- 2.e4#
- 1...Sd4
- 2.Be4#
- 1...Bxd2!
- 1...Qd4
- 1.Bxf5?
- threat
- 2.Be4#
- 2.Bxe6#
- 1...Qxd4
- 2.Sc3#
- 2.Be4#
- 1...Rxd4
- 2.Be4#
- 2.c4#
- 1...Bxd4
- 2.Be4#
- 2.e4#
- 1...cxd4
- 2.Rb5#
- 1...c4
- 2.Rb5#
- 1...Bd7
- 2.Be4#
- 1...Bf7
- 2.Be4#
- 1...Bg8
- 2.Be4#
- 2.Qxg8#
- 1...Bxf5!
- threat
- 1.Qe7?
- threat
- 2.Qxe6#
- 1...Qxd4
- 2.Sc3#
- 1...Rxd4
- 2.c4#
- 1...Bxd4
- 2.e4#
- 1...Sxd4
- 2.Be4#
- 1...Sfxe7
- 2.Be4#
- 1...cxd4
- 2.Rb5#
- 1...c4
- 2.Rb5#
- 1...Bd7
- 2.Qe4#
- 1...Bf7
- 2.Qe4#
- 2.Qxf7#
- 1...Bg8
- 2.Bxg8#
- 2.Qe4#
- 1...Sg7
- 2.Be4#
- 1...Scxe7!
- threat
- 1.Qd7?
- threat
- 2.Qc6#
- 2.Qxe6#
- 1...Qxd4
- 2.Sc3#
- 2.Qc6#
- 1...Rxd4
- 2.Qc6#
- 2.c4#
- 1...Bxd4
- 2.Qc6#
- 2.e4#
- 1...Sxd4
- 2.Be4#
- 2.Qc6#
- 1...cxd4
- 2.Rb5#
- 2.Qb5#
- 2.Qc6#
- 1...c4
- 2.Rb5#
- 2.Qb5#
- 2.Qc6#
- 1...Ra6
- 2.Qxe6#
- 2.c4#
- 1...Bf7
- 2.Qxf5#
- 2.Qc6#
- 2.Qxf7#
- 1...Bg8
- 2.Bxg8#
- 2.Qxf5#
- 2.Qc6#
- 1...Sfe7
- 2.Be4#
- 2.Qxe6#
- 1...Sg7
- 2.Be4#
- 2.Qc6#
- 1...Sa7
- 2.Qxe6#
- 1...Sce7
- 2.Qxe6#
- 1...Bxd7!
- threat
- 1.Qe8?
- threat
- 2.Qc6#
- 2.Qxe6#
- 1...Qxd4
- 2.Sc3#
- 2.Qc6#
- 1...Rxd4
- 2.Qc6#
- 2.c4#
- 1...Bxd4
- 2.Qc6#
- 2.e4#
- 1...Sxd4
- 2.Be4#
- 2.Qc6#
- 1...cxd4
- 2.Rb5#
- 2.Qb5#
- 2.Qc6#
- 1...c4
- 2.Rb5#
- 2.Qb5#
- 2.Qc6#
- 1...Ra6
- 2.Qxe6#
- 2.c4#
- 1...Bd7
- 2.Qe4#
- 1...Bf7
- 2.Qc6#
- 2.Qxf7#
- 2.Qe4#
- 1...Bg8
- 2.Bxg8#
- 2.Qc6#
- 2.Qe4#
- 2.Qxg8#
- 1...Sfe7
- 2.Be4#
- 1...Sg7
- 2.Be4#
- 2.Qc6#
- 1...Sa7
- 2.Qxe6#
- 1...Sce7!
- threat
- 1.Sb5+?
- Keys
- 1.Qg8!
- threat
- 2.Qxe6#
- 1...Qxd4
- 2.Sc3#
- 1...Rxd4
- 2.c4#
- 1...Bxd4
- 2.e4#
- 1...Bxg8
- 2.Bxg8#
- 1...Sxd4
- 2.Be4#
- 1...cxd4
- 2.Rb5#
- 1...c4
- 2.Rb5#
- 1...Bf7
- 2.Qxf7#
- 1...Sg7
- 2.Be4#
- threat
- 1.Qg8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 18
- Sets
- Q(a);N_GUARD::S(A),XQ(a)
- Q(a);N_GUARD,P_SPINQ(a),XS(G)::S(A)
- Q(a);N_GUARD::S(A)
- R(c);N_GUARD::P(B)
- R(c);N_GUARD,P_SPINR(c),XS(G)::P(B)
- R(c);N_GUARD,P_PINR(I)::P(B)
- B(b);OGATE::P(D)
- B(b);OGATE,XR(C)::P(D)
- B(b);OGATE,P_SPINB(b),XS(G)::P(D)
- S(f);OGATE,P_SPINS(f),XS(G)::B(K)
- S(f);OGATE::B(K)
- P(d);N_SPINP(g),OGATEB,P_SPINP(d),XS(G)::R(I)
- P(d);OGATEB::R(I)
- Tries
- Try
- S(G);CHECK
- Vars
- R(c);P_SPINR(c)::P(B)
- B(b);OGATE,P_SPINB(b)::P(D)
- S(f);OGATE,P_SPINS(f)::B(K)
- Refutation
- B(b);XR(C)
- Try
- S(G);CHECK,XS(f)
- Refutation
- B(b);XR(C)
- Try
- S(G);CHECK
- Vars
- Q(a);P_SPINQ(a)::S(A)
- R(c);P_SPINR(c)::P(B)
- B(b);OGATE,P_SPINB(b)::P(D)
- S(f);OGATE,P_SPINS(f)::B(K)
- Refutation
- B(b);XR(C)
- Try
- B(K);XS(f)
- Threat
- DUALS(2)
- Vars
- P(d);N_SPINP(g),OGATEB,P_SPINP(d),XS(G)::R(I)
- P(d);OGATEB::R(I)
- B(h);N_SPINP(g)::B(K)
- B(h);::B(K)
- Refutation
- B(h);XB(K)
- Try
- Q(L);N_PINP(g)
- Threat
- QAB1(L),XB(h)
- Vars
- Q(a);N_GUARD,P_SPINQ(a),XS(G)::S(A)
- R(c);N_GUARD,P_SPINR(c),XS(G)::P(B)
- B(b);OGATE,P_SPINB(b),XS(G)::P(D)
- S(f);OGATE,P_SPINS(f),XS(G)::B(K)
- S(f);OGATE,XQ(L)::B(K)
- P(d);OGATEB,P_SPINP(d),XS(G)::R(I)
- P(d);OGATEB::R(I)
- B(h);OGATE::QAB1(L)
- S(f);OGATE::B(K)
- Refutation
- S(i);XQ(L)
- Try
- Q(L);
- Threat
- DUALS(2)
- Vars
- S(i);::QAB1(L),XB(h)
- Refutation
- B(h);N_SPINP(g),XQ(L)
- Try
- Q(L);N_PINP(g)
- Threat
- DUALS(2)
- Vars
- B(h);OGATE::QAB1(L)
- S(f);OGATE::B(K)
- S(i);::QAB1(L),XB(h)
- Refutation
- S(i);
- Try
- Actual
- Q(L);N_PINP(g),P_PINB(h)
- Threat
- QAB1(L),XB(h)
- Vars
- Q(a);N_GUARD,P_SPINQ(a),XS(G)::S(A)
- R(c);N_GUARD,P_SPINR(c),XS(G)::P(B)
- B(b);N_SPINB(h),OGATE,P_SPINB(b),XS(G)::P(D)
- B(h);N_SPINB(h),OGATE,XQ(L)::B(K),XB(h)
- S(f);OGATE,P_SPINS(f),XS(G)::B(K)
- P(d);OGATEB,P_SPINP(d),XS(G)::R(I)
- P(d);OGATEB::R(I)
- B(h);OGATEB::QAB(L),XB(h)
- S(f);OGATE::B(K)
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).