MESON Chess Problem Database
Problem Display
PID: 42620 (3B4/4Q3/2p1PPN1/2Rq1k1P/5P1b/nB3PR1/8/3nKN2 w - - 0 1)
Watson, George
1st Comm., BCF 037. Ty., 1940-1941
#2
13 + 6
SOLUTION
- SOUND
- Sets
- 1...Qxc5
- 2.Qxc5#
- 1...Qe5+
- 2.Rxe5#
- 1...Bxg3+
- 2.Sxg3#
- 1...Bg5
- 2.Rxg5#
- 1...Bxf6
- 2.Qxf6#
- 1...Sb2
- 2.Se3#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb1
- 2.Bc2#
- 1...Sc2+
- 2.Bxc2#
- 1...Sc4
- 2.Bc2#
- 1...Sb5
- 2.Bc2#
- 1...Qxc5
- Tries
- 1.Ke2?
- 1...Qe5+
- 2.Rxe5#
- 1...Qxc5
- 2.Qxc5#
- 1...Bxg3
- 2.Sxg3#
- 1...Bxf6
- 2.Qxf6#
- 1...Bg5
- 2.Rxg5#
- 1...Sb2
- 2.Se3#
- 1...Sf2
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb1
- 2.Bc2#
- 1...Sc2
- 2.Bxc2#
- 1...Sc4
- 2.Bc2#
- 1...Sb5
- 2.Bc2#
- 1...Sc3+!
- 1...Qe5+
- 1.Bxd1?
- threat
- 2.Se3#
- 1...Bxg3+
- 2.Sxg3#
- 1...Sc2+
- 2.Bxc2#
- 1...Sc4
- 2.Bc2#
- 1...Qxc5!
- threat
- 1.Ba2?
- 1...Qe5+
- 2.Rxe5#
- 1...Bxg3+
- 2.Sxg3#
- 1...Qxc5
- 2.Qxc5#
- 1...Bxf6
- 2.Qxf6#
- 1...Sb2
- 2.Se3#
- 1...Bg5
- 2.Rxg5#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb1
- 2.Bxb1#
- 1...Sc4
- 2.Bb1#
- 1...Sb5
- 2.Bb1#
- 1...Sc2+!
- 1...Qe5+
- 1.Ba4?
- 1...Qe5+
- 2.Rxe5#
- 1...Bxg3+
- 2.Sxg3#
- 1...Sc2+
- 2.Bxc2#
- 1...Bxf6
- 2.Qxf6#
- 1...Sb2
- 2.Se3#
- 1...Bg5
- 2.Rxg5#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb1
- 2.Bc2#
- 1...Sc4
- 2.Bc2#
- 1...Sb5
- 2.Bc2#
- 1...Qxc5!
- 1...Qe5+
- 1.Bxd5?
- threat
- 2.Ba2#
- 2.Bb3#
- 2.Bc4#
- 2.Be4#
- 2.Bxc6#
- 1...Bxg3+
- 2.Sxg3#
- 1...Bxf6
- 2.Be4#
- 2.Qxf6#
- 1...cxd5
- 2.Rxd5#
- 1...Sc3
- 2.Se3#
- 2.Be4#
- 1...Se3
- 2.Sxe3#
- 2.Be4#
- 1...Sc4
- 2.Bxc4#
- 2.Be4#
- 1...Sc2+!
- threat
- 1.Bc7?
- threat
- 2.Sxh4#
- 1...Qe5+
- 2.Rxe5#
- 1...Bxg3+
- 2.Sxg3#
- 1...Sc2+
- 2.Bxc2#
- 1...Bg5
- 2.Rxg5#
- 1...Bxf6!
- threat
- 1.Qd6?
- threat
- 2.Sxh4#
- 1...Qe5+
- 2.Rxe5#
- 2.Qxe5#
- 1...Bxg3+
- 2.Sxg3#
- 1...Sc2+
- 2.Bxc2#
- 1...Bg5
- 2.Rxg5#
- 1...Bxf6!
- threat
- 1.Qf7?
- 1...Qe5+
- 2.Rxe5#
- 1...Bxg3+
- 2.Sxg3#
- 1...Sc2+
- 2.Bxc2#
- 1...Bxf6
- 2.Rg5#
- 2.Qxf6#
- 1...Sb2
- 2.Se3#
- 1...Bg5
- 2.Rxg5#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb1
- 2.Bc2#
- 1...Sc4
- 2.Bc2#
- 1...Sb5
- 2.Bc2#
- 1...Qxc5!
- 1...Qe5+
- 1.h6?
- 1...Qe5+
- 2.Rxe5#
- 1...Sc2+
- 2.Bxc2#
- 1...Qxc5
- 2.Qxc5#
- 1...Bxf6
- 2.Qxf6#
- 1...Bg5
- 2.Rxg5#
- 1...Sb2
- 2.Se3#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb1
- 2.Bc2#
- 1...Sc4
- 2.Bc2#
- 1...Sb5
- 2.Bc2#
- 1...Bxg3+!
- 1...Qe5+
- 1.f7?
- 1...Qe5+
- 2.Rxe5#
- 1...Bxg3+
- 2.Sxg3#
- 1...Sc2+
- 2.Bxc2#
- 1...Qxc5
- 2.Qxc5#
- 1...Sb2
- 2.Se3#
- 1...Bg5
- 2.Rxg5#
- 1...Bf6
- 2.Qxf6#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb1
- 2.Bc2#
- 1...Sc4
- 2.Bc2#
- 1...Sb5
- 2.Bc2#
- 1...Bxe7!
- 1...Qe5+
- 1.Ke2?
- Keys
- 1.Qd7!
- 1...Qe5+
- 2.Rxe5#
- 1...Bxg3+
- 2.Sxg3#
- 1...Sc2+
- 2.Bxc2#
- 1...Qxc5
- 2.Qd3#
- 1...Bxf6
- 2.e7#
- 1...Sb2
- 2.Se3#
- 1...Bg5
- 2.Rxg5#
- 1...Sf2
- 2.Se3#
- 1...Sc3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb1
- 2.Bc2#
- 1...Sc4
- 2.Bc2#
- 1...Sb5
- 2.Bc2#
- 1...Qe5+
- 1.Qd7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(d);N_SPINQ(d),OGATE,XR(G)::QAR(L),XQ(d)
- Q(d);CHECK,OGATE::R1(G),XQ(d)
- B(c);CHECK,XR(E)::S(B),XB(c)
- B(c);N_PINR(E)::R1(E),XB(c)
- B(c);N_PINR(E),OGATE,XP(J)::QAR1(L),XB(c)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD,N_PINR(E)::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(b);N_GUARD::B(C)
- S(b);CHECK,N_GUARD::B(C),XS(b)
- Tries
- Try
- K(A);N_SPINR(E),P-FLIGHT
- Vars
- Q(d);CHECK,OGATE::R1(G),XQ(d)
- Q(d);N_SPINQ(d),OGATE,XR(G)::QAR(L),XQ(d)
- B(c);XR(E)::S(B),XB(c)
- B(c);OGATE,XP(J)::QAR1(L),XB(c)
- B(c);N_GUARD::R1(E),XB(c)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(b);N_GUARD::B(C)
- S(b);N_GUARD::B(C),XS(b)
- Refutation
- S(a);CHECK
- Try
- B(C);XS(a)
- Threat
- S(B)
- Vars
- B(c);CHECK,XR(E)::S(B),XB(c)
- S(b);CHECK,N_GUARD::B(C),XS(b)
- S(b);N_GUARD::B(C)
- Refutation
- Q(d);N_SPINQ(d),XR(G)
- Try
- B(C);
- Vars
- Q(d);CHECK,OGATE::R1(G),XQ(d)
- B(c);CHECK,XR(E)::S(B),XB(c)
- Q(d);N_SPINQ(d),OGATE,XR(G)::QAR(L),XQ(d)
- B(c);N_PINR(E),OGATE,XP(J)::QAR1(L),XB(c)
- S(a);N_GUARD::S(B)
- B(c);N_PINR(E)::R1(E),XB(c)
- S(a);N_GUARD,N_PINR(E)::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(b);N_GUARD::B(C),XS(b)
- S(b);N_GUARD::B(C)
- Refutation
- S(b);CHECK
- Try
- B(C);
- Vars
- Q(d);CHECK,OGATE::R1(G),XQ(d)
- B(c);CHECK,XR(E)::S(B),XB(c)
- S(b);CHECK,N_GUARD::B(C),XS(b)
- B(c);N_PINR(E),OGATE,XP(J)::QAR1(L),XB(c)
- S(a);N_GUARD::S(B)
- B(c);N_PINR(E)::R1(E),XB(c)
- S(a);N_GUARD,N_PINR(E)::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(b);N_GUARD::B(C)
- Refutation
- Q(d);N_SPINQ(d),XR(G)
- Try
- B(C);XQ(d)
- Threat
- DUALS(5)
- Vars
- B(c);CHECK,XR(E)::S(B),XB(c)
- P(f);OGATE,P_SPINP(f),XB(C)::R(G),XP(f)
- Refutation
- S(b);CHECK
- Try
- B(M);
- Threat
- S(K),XB(c)
- Vars
- Q(d);CHECK,OGATE::R1(G),XQ(d)
- B(c);CHECK,XR(E)::S(B),XB(c)
- S(b);CHECK,N_GUARD::B(C),XS(b)
- B(c);N_PINR(E)::R1(E),XB(c)
- Refutation
- B(c);N_PINR(E),XP(J)
- Try
- Q(L);
- Threat
- S(K),XB(c)
- Vars
- B(c);CHECK,XR(E)::S(B),XB(c)
- S(b);CHECK,N_GUARD::B(C),XS(b)
- B(c);N_PINR(E)::R1(E),XB(c)
- Refutation
- B(c);N_PINR(E),XP(J)
- Try
- Q(L);
- Vars
- Q(d);CHECK,OGATE::R1(G),XQ(d)
- B(c);CHECK,XR(E)::S(B),XB(c)
- S(b);CHECK,N_GUARD::B(C),XS(b)
- S(a);N_GUARD::S(B)
- B(c);N_PINR(E)::R1(E),XB(c)
- S(a);N_GUARD,N_PINR(E)::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(b);N_GUARD::B(C)
- Refutation
- Q(d);N_SPINQ(d),XR(G)
- Try
- P(H);
- Vars
- Q(d);CHECK,OGATE::R1(G),XQ(d)
- S(b);CHECK,N_GUARD::B(C),XS(b)
- Q(d);N_SPINQ(d),OGATE,XR(G)::QAR(L),XQ(d)
- B(c);N_PINR(E),OGATE,XP(J)::QAR1(L),XB(c)
- B(c);N_PINR(E)::R1(E),XB(c)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD,N_PINR(E)::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(b);N_GUARD::B(C)
- Refutation
- B(c);CHECK,XR(E)
- Try
- P(J);
- Vars
- Q(d);CHECK,OGATE::R1(G),XQ(d)
- B(c);CHECK,XR(E)::S(B),XB(c)
- S(b);CHECK,N_GUARD::B(C),XS(b)
- Q(d);N_SPINQ(d),OGATE,XR(G)::QAR(L),XQ(d)
- S(a);N_GUARD::S(B)
- B(c);N_PINR(E)::R1(E),XB(c)
- B(c);N_GUARD,N_PINR(E)::QAR1(L),XB(c)
- S(a);N_GUARD,N_PINR(E)::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(b);N_GUARD::B(C)
- Refutation
- B(c);N_PINR(E),XQ(L)
- Try
- Actual
- Q(L);
- Vars
- Q(d);CHECK,OGATE::R1(G),XQ(d)
- B(c);CHECK,XR(E)::S(B),XB(c)
- S(b);CHECK,N_GUARD::B(C),XS(b)
- Q(d);N_SPINQ(d),OGATE,XR(G)::QAB(L)
- B(c);N_PINR(E),SBLOCK,XP(J)::QAB(L)+P(I)
- S(a);N_GUARD::S(B)
- B(c);N_PINR(E)::R1(E),XB(c)
- S(a);N_GUARD,N_PINR(E)::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(b);N_GUARD::B(C)
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).