MESON Chess Problem Database
Problem Display
PID: 16836 (8/2Q2B2/K4P2/2Pq4/n1kP4/B1pR4/Pp2P3/1N6 w - - 0 1)
Gray, Robert
1st Prize, Sunday Mail, 1943
#2
11 + 5
SOLUTION
- SOUND
- Sets
- 1...Qe6+
- 2.Bxe6#
- 1...Qxf7
- 2.Qxf7#
- 1...Sxc5+
- 2.Qxc5#
- 1...Sb6
- 2.cxb6#
- 1...c2
- 2.Sd2#
- 1...Qe6+
- Tries
- 1.Ka5?
- 1...Qxf7
- 2.Qxf7#
- 1...Sxc5
- 2.Qxc5#
- 1...Qe6
- 2.Bxe6#
- 1...c2
- 2.Sd2#
- 1...Sb6!
- 1...Qxf7
- 1.Sxc3?
- threat
- 2.Bxd5#
- 1...Qe6+
- 2.Bxe6#
- 1...Sxc5+
- 2.Qxc5#
- 1...Qxf7
- 2.Qxf7#
- 1...Sb6
- 2.cxb6#
- 1...Sxc3!
- threat
- 1.Be6?
- 1...Sxc5+
- 2.Qxc5#
- 1...Sb6
- 2.cxb6#
- 1...c2
- 2.Sd2#
- 1...Qxe6+!
- 1...Sxc5+
- 1.Bg8?
- 1...Qe6+
- 2.Bxe6#
- 1...Sxc5+
- 2.Qxc5#
- 1...Qf7
- 2.Bxf7#
- 2.Qxf7#
- 1...Sb6
- 2.cxb6#
- 1...c2
- 2.Sd2#
- 1...Qxg8!
- 1...Qe6+
- 1.Rd1?
- 1...Qe6+
- 2.Bxe6#
- 1...Sxc5+
- 2.Qxc5#
- 1...Qxf7
- 2.Qxf7#
- 1...Sb6
- 2.cxb6#
- 1...c2!
- 1...Qe6+
- 1.Qa5?
- threat
- 2.Qb4#
- 2.Qxa4#
- 2.Qb5#
- 1...Qe6+
- 2.Bxe6#
- 1...Sxc5+
- 2.Qxc5#
- 1...Sb6
- 2.Qxc3#
- 2.Qb4#
- 2.Qb5#
- 1...Qxf7!
- threat
- 1.Qb6?
- threat
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Sxc5+
- 2.Qxc5#
- 1...Qxf7
- 2.Qb3#
- 1...Qe6
- 2.Bxe6#
- 2.Qxe6#
- 1...Sxb6!
- threat
- 1.Qc6?
- threat
- 2.Bxd5#
- 2.Qxa4#
- 2.Qb5#
- 2.Qxd5#
- 1...Sxc5+
- 2.Qxc5#
- 1...Sb6
- 2.Qb5#
- 2.cxb6#
- 1...Qe6
- 2.Bxe6#
- 2.Qxe6#
- 1...Qxf7!
- threat
- 1.Qa7?
- 1...Qe6+
- 2.Bxe6#
- 1...Sxc5+
- 2.Qxc5#
- 1...Qxf7
- 2.Qxf7#
- 1...c2
- 2.Sd2#
- 1...Sb6!
- 1...Qe6+
- 1.Qd7?
- threat
- 2.Bxd5#
- 2.Qxa4#
- 2.Qb5#
- 2.Qxd5#
- 1...Qe6+
- 2.Bxe6#
- 2.Qxe6#
- 1...Qxf7
- 2.Qxf7#
- 1...Sb6
- 2.Qb5#
- 1...Sxc5+!
- threat
- 1.Qe7?
- 1...Qe6+
- 2.Bxe6#
- 2.Qxe6#
- 1...Sxc5+
- 2.Qxc5#
- 1...Qxf7
- 2.Qxf7#
- 1...c2
- 2.Sd2#
- 1...Sb6!
- 1...Qe6+
- 1.Qc8?
- 1...Qe6+
- 2.Bxe6#
- 2.Qxe6#
- 1...Sxc5+
- 2.Qxc5#
- 1...Sb6
- 2.cxb6#
- 1...c2
- 2.Sd2#
- 1...Qxf7!
- 1...Qe6+
- 1.Ka5?
- Keys
- 1.Qf4!
- 1...Qe6+
- 2.Bxe6#
- 1...Sxc5+
- 2.dxc5#
- 1...Qxf7
- 2.d5#
- 1...c2
- 2.Sd2#
- 1...Sb6
- 2.Rxc3#
- 1...Qe6+
- 1.Qf4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(e);CHECK,OGATEB::B(K),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XB(K)::QAB(J),XQ(e)
- S(c);CHECK,OGATE,P_SPINS(c),XP(G)::QAR1(J),XS(c)
- S(c);OGATE::QAR(J)+P(G),XS(c)
- P(b);N_GUARD::S(A)
- Tries
- Try
- K(H);P-FLIGHT,P_SPINP(G)
- Vars
- Q(e);N_PINP(G),N_SPINQ(e),OGATE,XB(K)::QAB(J),XQ(e)
- S(c);OGATE,P_SPINS(c),XP(G)::QAR1(J),XS(c)
- Q(e);N_PINP(G),OGATEB::B(K),XQ(e)
- P(b);N_GUARD::S(A)
- Refutation
- S(c);
- Try
- S(A);XP(b)
- Threat
- B(K),XQ(e)
- Vars
- Q(e);CHECK,OGATEB::B(K),XQ(e)
- S(c);CHECK,OGATE,P_SPINS(c),XP(G)::QAR1(J),XS(c)
- Q(e);N_SPINQ(e),OGATE,XB(K)::QAB(J),XQ(e)
- S(c);OGATE::QAR(J)+P(G),XS(c)
- Refutation
- S(c);XS(A)
- Try
- B(K);
- Vars
- S(c);CHECK,OGATE,P_SPINS(c),XP(G)::QAR1(J),XS(c)
- S(c);OGATE::QAR(J)+P(G),XS(c)
- P(b);N_GUARD::S(A)
- Refutation
- Q(e);CHECK,N_SPINQ(e),XB(K)
- Try
- B(K);
- Vars
- Q(e);CHECK,OGATEB::B(K),XQ(e)
- S(c);CHECK,OGATE,P_SPINS(c),XP(G)::QAR1(J),XS(c)
- S(c);OGATE::QAR(J)+P(G),XS(c)
- P(b);N_GUARD::S(A)
- Refutation
- Q(e);N_SPINQ(e),XB(K)
- Try
- R(E);
- Vars
- Q(e);CHECK,OGATEB::B(K),XQ(e)
- S(c);CHECK,OGATE,P_SPINS(c),XP(G)::QAR1(J),XS(c)
- Q(e);N_SPINQ(e),OGATE,XB(K)::QAB(J),XQ(e)
- S(c);OGATE::QAR(J)+P(G),XS(c)
- Refutation
- P(b);
- Try
- Q(J);
- Threat
- DUALS(3)
- Vars
- Q(e);CHECK,OGATEB::B(K),XQ(e)
- S(c);CHECK,OGATE,XP(G)::QAR1(J),XS(c)
- Refutation
- Q(e);N_SPINQ(e),XB(K)
- Try
- Q(J);
- Threat
- DUALS(3)
- Vars
- S(c);CHECK,OGATE,XP(G)::QAR1(J),XS(c)
- Q(e);N_SPINQ(e),XB(K)::QAB1(J)
- Refutation
- S(c);XQ(J)
- Try
- Q(J);
- Threat
- DUALS(4)
- Vars
- S(c);CHECK,OGATE,P_SPINS(c),XP(G)::QAR1(J),XS(c)
- Refutation
- Q(e);N_SPINQ(e),XB(K)
- Try
- Q(J);
- Vars
- Q(e);CHECK,OGATEB::B(K),XQ(e)
- S(c);CHECK,OGATE,XP(G)::QAR1(J),XS(c)
- Q(e);N_SPINQ(e),OGATE,XB(K)::QAB(J),XQ(e)
- P(b);N_GUARD::S(A)
- Refutation
- S(c);
- Try
- Q(J);
- Threat
- DUALS(4)
- Vars
- Q(e);N_SPINQ(e),OGATE,XB(K)::QAB(J),XQ(e)
- S(c);::QAB1(J)
- Refutation
- S(c);CHECK,XP(G)
- Try
- Q(J);
- Vars
- S(c);CHECK,OGATE,XP(G)::QAR1(J),XS(c)
- Q(e);N_SPINQ(e),OGATE,XB(K)::QAB(J),XQ(e)
- P(b);N_GUARD::S(A)
- Refutation
- S(c);
- Try
- Q(J);
- Vars
- S(c);CHECK,OGATE,P_SPINS(c),XP(G)::QAR1(J),XS(c)
- S(c);OGATE::QAR(J)+P(G),XS(c)
- P(b);N_GUARD::S(A)
- Refutation
- Q(e);N_SPINQ(e),XB(K)
- Try
- Actual
- Q(J);
- Vars
- Q(e);CHECK,OGATEB::B(K),XQ(e)
- S(c);CHECK,OGATE,XP(G)::QAR(J)+P(F),XS(c)
- Q(e);N_SPINQ(e),OGATE,XB(K)::QAR(J)+P(F)
- P(b);N_GUARD::S(A)
- S(c);N_GUARD::R1(E),XP(b)
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).