MESON Chess Problem Database
Problem Display
PID: 42736 (3N4/1p1N1p2/p2pbBQp/P1Rpq2P/Rb1kB3/1P3P2/n2P2p1/4K3 w - - 0 1)
Watson, George
Recomm., BCF 037. Ty., 1940-1941
#2
13 + 12
SOLUTION
- SOUND
- Sets
- 1...Qxf6
- 2.Qxf6#
- 1...Bh3
- 2.Rxd5#
- 1...Bg4
- 2.Rxd5#
- 1...Bf5
- 2.Rxd5#
- 1...Bxd7
- 2.Rxd5#
- 1...Sc1
- 2.Rxb4#
- 1...Sc3
- 2.Rxb4#
- 1...g1Q+
- 2.Qxg1#
- 1...g1S
- 2.Qxg1#
- 1...g1B
- 2.Qxg1#
- 1...g1R+
- 2.Qxg1#
- 1...dxe4
- 2.Qxe4#
- 1...dxc5
- 2.Bxe5#
- 1...b5
- 2.Sc6#
- 1...b6
- 2.Sc6#
- 1...fxg6
- 2.Sxe6#
- 1...Qxf6
- Tries
- 1.Kd1?
- 1...g1Q+
- 2.Qxg1#
- 1...g1R+
- 2.Qxg1#
- 1...Qxf6
- 2.Qxf6#
- 1...Bxd7
- 2.Rxd5#
- 1...dxe4
- 2.Qxe4#
- 1...dxc5
- 2.Bxe5#
- 1...fxg6
- 2.Sxe6#
- 1...g1S
- 2.Qxg1#
- 1...g1B
- 2.Qxg1#
- 1...Bh3
- 2.Rxd5#
- 1...Bg4
- 2.Rxd5#
- 1...Bf5
- 2.Rxd5#
- 1...Sc1
- 2.Rxb4#
- 1...b5
- 2.Sc6#
- 1...b6
- 2.Sc6#
- 1...Sc3+!
- 1...g1Q+
- 1.Ke2?
- 1...Sc3+
- 2.dxc3#
- 1...g1S+
- 2.Qxg1#
- 1...Qxf6
- 2.Qxf6#
- 1...Bxd7
- 2.Rxd5#
- 1...dxe4
- 2.Qxe4#
- 1...dxc5
- 2.Bxe5#
- 1...fxg6
- 2.Sxe6#
- 1...g1Q
- 2.Qxg1#
- 1...g1B
- 2.Qxg1#
- 1...g1R
- 2.Qxg1#
- 1...Bh3
- 2.Rxd5#
- 1...Bg4
- 2.Rxd5#
- 1...Bf5
- 2.Rxd5#
- 1...b5
- 2.Sc6#
- 1...b6
- 2.Sc6#
- 1...Sc1+!
- 1...Sc3+
- 1.Sxb7?
- 1...g1Q+
- 2.Qxg1#
- 1...g1R+
- 2.Qxg1#
- 1...Qxf6
- 2.Qxf6#
- 1...Bxd7
- 2.Rxd5#
- 1...dxe4
- 2.Qxe4#
- 1...dxc5
- 2.Bxe5#
- 1...g1S
- 2.Qxg1#
- 1...g1B
- 2.Qxg1#
- 1...Bh3
- 2.Rxd5#
- 1...Bg4
- 2.Rxd5#
- 1...Bf5
- 2.Rxd5#
- 1...Sc1
- 2.Rxb4#
- 1...Sc3
- 2.Rxb4#
- 1...fxg6!
- 1...g1Q+
- 1.Rc3?
- threat
- 2.Rd3#
- 1...g1Q+
- 2.Qxg1#
- 1...g1R+
- 2.Qxg1#
- 1...Sxc3
- 2.Rxb4#
- 1...dxe4
- 2.Qxe4#
- 1...Sc1
- 2.Rxb4#
- 1...Bxd7!
- threat
- 1.Rb5?
- 1...g1Q+
- 2.Qxg1#
- 1...g1R+
- 2.Qxg1#
- 1...Qxf6
- 2.Qxf6#
- 1...Bxd7
- 2.Rxd5#
- 1...dxe4
- 2.Qxe4#
- 1...fxg6
- 2.Sxe6#
- 1...g1S
- 2.Qxg1#
- 1...g1B
- 2.Qxg1#
- 1...Bh3
- 2.Rxd5#
- 1...Bg4
- 2.Rxd5#
- 1...Bf5
- 2.Rxd5#
- 1...Sc1
- 2.Raxb4#
- 2.Rbxb4#
- 1...Sc3
- 2.Raxb4#
- 2.Rbxb4#
- 1...b6
- 2.Sc6#
- 1...axb5!
- 1...g1Q+
- 1.Qg3?
- threat
- 2.Qf2#
- 1...g1Q+
- 2.Qxg1#
- 1...g1R+
- 2.Qxg1#
- 1...g1B
- 2.Qxg1#
- 1...dxe4!
- threat
- 1.Qg5?
- threat
- 2.Qe3#
- 1...g1Q+
- 2.Qxg1#
- 1...g1R+
- 2.Qxg1#
- 1...g1B
- 2.Qxg1#
- 1...hxg5!
- threat
- 1.Qg7?
- 1...g1Q+
- 2.Qxg1#
- 1...g1R+
- 2.Qxg1#
- 1...Qxf6
- 2.Qxf6#
- 1...Bxd7
- 2.Rxd5#
- 1...dxc5
- 2.Bxe5#
- 1...g1S
- 2.Qxg1#
- 1...g1B
- 2.Qxg1#
- 1...Bh3
- 2.Rxd5#
- 1...Bg4
- 2.Rxd5#
- 1...Bf5
- 2.Rxd5#
- 1...Sc1
- 2.Rxb4#
- 1...Sc3
- 2.Rxb4#
- 1...b5
- 2.Sc6#
- 1...b6
- 2.Sc6#
- 1...dxe4!
- 1...g1Q+
- 1.Kd1?
- Keys
- 1.Qg4!
- 1...g1Q+
- 2.Qxg1#
- 1...g1R+
- 2.Qxg1#
- 1...Qxf6
- 2.Bf5#
- 1...Bxg4
- 2.Rxd5#
- 1...Bxd7
- 2.Rxd5#
- 1...dxe4
- 2.Qxe4#
- 1...dxc5
- 2.Bxe5#
- 1...g1S
- 2.Qxg1#
- 1...g1B
- 2.Qxg1#
- 1...Bf5
- 2.Rxd5#
- 1...Sc1
- 2.Rxb4#
- 1...Sc3
- 2.Rxb4#
- 1...b5
- 2.Sc6#
- 1...b6
- 2.Sc6#
- 1...g1Q+
- 1.Qg4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- Q(f);N_PINB(F),N_SPINQ(f),OGATE,XB(J)::QAB(K),XQ(f)
- B(i);N_GUARD::R1(H),XP(e)
- B(i);N_GUARD,XS(L)::R1(H),XP(e)
- S(a);N_GUARD::R(E),XB(c)
- S(a);N_GUARD,N_PINP(B)::R(E),XB(c)
- P(b);CHECK,OGATE::QAB(K),XQ(b)
- P(b);OGATE::QAB(K),XS(b)
- P(b);OGATE::QAB(K),XB(b)
- P(b);CHECK,OGATE::QAB(K),XR(b)
- P(e);OGATE,XB(F)::QAR1(K),XP(e)
- P(h);N_GUARD,XR(H)::B(J),XQ(f)
- P(k);N_GUARD::S(M)
- P(l);N_GUARD,XQ(K)::S(M),XB(i)
- Tries
- Try
- K(A);N_SPINB(F),N_SPINP(B),P-FLIGHT
- Vars
- P(b);CHECK,OGATE::QAB(K),XQ(b)
- P(b);CHECK,OGATE::QAB(K),XR(b)
- Q(f);N_SPINQ(f),OGATE,XB(J)::QAB(K),XQ(f)
- B(i);N_GUARD,XS(L)::R1(H),XP(e)
- P(e);OGATE,XB(F)::QAR1(K),XP(e)
- P(h);N_GUARD,XR(H)::B(J),XQ(f)
- P(l);N_GUARD,XQ(K)::S(M),XB(i)
- P(b);OGATE::QAB(K),XS(b)
- P(b);OGATE::QAB(K),XB(b)
- B(i);N_GUARD::R1(H),XP(e)
- B(i);N_GUARD,P_PINP(D)::R1(H),XP(e)
- S(a);N_GUARD::R(E),XB(c)
- P(k);N_GUARD::S(M)
- Refutation
- S(a);CHECK
- Try
- K(A);N_SPINP(B),P-FLIGHT
- Vars
- S(a);CHECK::P(B),XS(a)
- P(b);CHECK,OGATE::QAB(K),XS(b)
- Q(f);N_PINB(F),N_SPINQ(f),OGATE,XB(J)::QAB(K),XQ(f)
- B(i);N_GUARD,XS(L)::R1(H),XP(e)
- P(e);OGATE,XB(F)::QAR1(K),XP(e)
- P(h);N_GUARD,XR(H)::B(J),XQ(f)
- P(l);N_GUARD,XQ(K)::S(M),XB(i)
- P(b);OGATE::QAB(K),XQ(b)
- P(b);OGATE::QAB(K),XB(b)
- P(b);OGATE::QAB(K),XR(b)
- B(i);N_GUARD::R1(H),XP(e)
- B(i);N_GUARD,P_PINP(D)::R1(H),XP(e)
- P(k);N_GUARD::S(M)
- Refutation
- S(a);CHECK
- Try
- S(M);XP(k)
- Vars
- P(b);CHECK,OGATE::QAB(K),XQ(b)
- P(b);CHECK,OGATE::QAB(K),XR(b)
- Q(f);N_PINB(F),N_SPINQ(f),OGATE,XB(J)::QAB(K),XQ(f)
- B(i);N_GUARD,XS(L)::R1(H),XP(e)
- P(e);OGATE,XB(F)::QAR1(K),XP(e)
- P(h);N_GUARD,XR(H)::B(J),XQ(f)
- P(b);OGATE::QAB(K),XS(b)
- P(b);OGATE::QAB(K),XB(b)
- B(i);N_GUARD::R1(H),XP(e)
- S(a);N_GUARD::R(E),XB(c)
- S(a);N_GUARD,N_PINP(B)::R(E),XB(c)
- Refutation
- P(l);XQ(K)
- Try
- R(H);N_SPINP(B)
- Threat
- R1(H)
- Vars
- P(b);CHECK,OGATE::QAB(K),XQ(b)
- P(b);CHECK,OGATE::QAB(K),XR(b)
- S(a);N_GUARD,XR(H)::R(E),XB(c)
- P(e);OGATE,XB(F)::QAR1(K),XP(e)
- S(a);N_GUARD::R(E),XB(c)
- Refutation
- B(i);XS(L)
- Try
- R(H);
- Vars
- P(b);CHECK,OGATE::QAB(K),XQ(b)
- P(b);CHECK,OGATE::QAB(K),XR(b)
- Q(f);N_PINB(F),N_SPINQ(f),OGATE,XB(J)::QAB(K),XQ(f)
- B(i);N_GUARD,XS(L)::R1(H),XP(e)
- P(e);OGATE,XB(F)::QAR1(K),XP(e)
- P(l);N_GUARD,XQ(K)::S(M),XB(i)
- P(b);OGATE::QAB(K),XS(b)
- P(b);OGATE::QAB(K),XB(b)
- B(i);N_GUARD::R1(H),XP(e)
- P(k);N_GUARD::S(M)
- Refutation
- P(g);XR(H)
- Try
- Q(K);
- Threat
- QAB(K)
- Vars
- P(b);CHECK,OGATE::QAB(K),XQ(b)
- P(b);CHECK,OGATE::QAB(K),XR(b)
- P(b);OGATE::QAB(K),XB(b)
- Refutation
- P(e);XB(F)
- Try
- Q(K);
- Threat
- QAB1(K)
- Vars
- P(b);CHECK,OGATE::QAB(K),XQ(b)
- P(b);CHECK,OGATE::QAB(K),XR(b)
- P(b);OGATE::QAB(K),XB(b)
- Refutation
- P(j);XQ(K)
- Try
- Q(K);
- Vars
- P(b);CHECK,OGATE::QAB(K),XQ(b)
- P(b);CHECK,OGATE::QAB(K),XR(b)
- Q(f);N_PINB(F),OGATE,XB(J)::QAB(K),XQ(f)
- B(i);N_GUARD,XS(L)::R1(H),XP(e)
- P(h);N_GUARD,XR(H)::B(J),XQ(f)
- P(b);OGATE::QAB(K),XS(b)
- P(b);OGATE::QAB(K),XB(b)
- B(i);N_GUARD::R1(H),XP(e)
- S(a);N_GUARD::R(E),XB(c)
- S(a);N_GUARD,N_PINP(B)::R(E),XB(c)
- P(k);N_GUARD::S(M)
- Refutation
- P(e);XB(F)
- Try
- Actual
- Q(K);
- Vars
- P(b);CHECK,OGATE::QAB(K),XQ(b)
- P(b);CHECK,OGATE::QAB(K),XR(b)
- Q(f);N_PINB(F),N_SPINQ(f),XB(J)::QAR(K)+B(F)
- B(i);N_GUARD,XQ(K)::R1(H),XP(e)
- B(i);N_GUARD,XS(L)::R1(H),XP(e)
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(K),XP(e)
- P(h);N_GUARD,XR(H)::B(J),XQ(f)
- P(b);OGATE::QAB(K),XS(b)
- P(b);OGATE::QAB(K),XB(b)
- B(i);N_GUARD::R1(H),XP(e)
- S(a);N_GUARD::R(E),XB(c)
- S(a);N_GUARD,N_PINP(B)::R(E),XB(c)
- P(k);N_GUARD::S(M)
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).