MESON Chess Problem Database
Problem Display
PID: 68017 (1R6/1bN5/1pkP4/p5p1/PbNP2B1/1R4Qp/1P5K/6n1 w - - 0 1)
Watson, George
Chess, 1949
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Be1
- 2.Rxb6#
- 1...Bd2
- 2.Rxb6#
- 1...Ba3
- 2.Rxb6#
- 1...Bc3
- 2.Rxb6#
- 1...Bc5
- 2.d5#
- 1...Bxd6
- 2.Qxd6#
- 1...Ba6
- 2.Rxb6#
- 1...Ba8
- 2.Rxb6#
- 1...Bc8
- 2.Rxb6#
- 1...Se2
- 2.Qf3#
- 1...Sf3+
- 2.Qxf3#
- 1...b5
- 2.axb5#
- 1...Be1
- Tries
- 1.Kxg1?
- threat
- 2.Qf3#
- 1...Bxd6
- 2.Qxd6#
- 1...h2+!
- threat
- 1.Kh1?
- 1...Bxd6
- 2.Qxd6#
- 1...Be1
- 2.Rxb6#
- 1...Bd2
- 2.Rxb6#
- 1...Ba3
- 2.Rxb6#
- 1...Bc3
- 2.Rxb6#
- 1...Bc5
- 2.d5#
- 1...Ba6
- 2.Rxb6#
- 1...Ba8
- 2.Rxb6#
- 1...Bc8
- 2.Rxb6#
- 1...Se2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...b5
- 2.axb5#
- 1...h2!
- 1...Bxd6
- 1.Bf3+?
- 1...Kd7
- 2.Sxb6#
- 2.Qg4#
- 1...Sxf3+!
- 1...Kd7
- 1.Bf5?
- 1...Sf3+
- 2.Qxf3#
- 1...Bxd6
- 2.Qxd6#
- 1...Be1
- 2.Rxb6#
- 1...Bd2
- 2.Rxb6#
- 1...Ba3
- 2.Rxb6#
- 1...Bc3
- 2.Rxb6#
- 1...Bc5
- 2.d5#
- 1...Ba6
- 2.Rxb6#
- 1...Ba8
- 2.Rxb6#
- 1...Bc8
- 2.Rxb6#
- 1...Se2
- 2.Qf3#
- 1...b5
- 2.axb5#
- 1...g4!
- 1...Sf3+
- 1.Be6?
- 1...Sf3+
- 2.Qxf3#
- 1...Bxd6
- 2.Qxd6#
- 1...Be1
- 2.Rxb6#
- 1...Bd2
- 2.Rxb6#
- 1...Ba3
- 2.Rxb6#
- 1...Bc3
- 2.Rxb6#
- 1...Bc5
- 2.d5#
- 1...Ba6
- 2.Rxb6#
- 1...Ba8
- 2.Rxb6#
- 1...Bc8
- 2.Rxb6#
- 1...Se2
- 2.Qf3#
- 1...b5
- 2.axb5#
- 1...g4!
- 1...Sf3+
- 1.Rc3?
- threat
- 2.Sxa5#
- 1...Sf3+
- 2.Qxf3#
- 1...Bc5
- 2.d5#
- 1...b5
- 2.axb5#
- 1...Bxc3!
- threat
- 1.Rxb4?
- threat
- 2.Rxb6#
- 1...Sf3+
- 2.Qxf3#
- 1...b5
- 2.axb5#
- 1...axb4!
- threat
- 1.Qf2?
- threat
- 2.d5#
- 1...Sf3+
- 2.Qxf3#
- 1...Bxd6+!
- threat
- 1.Qf4?
- threat
- 2.Qe4#
- 1...Sf3+
- 2.Qxf3#
- 1...Bxd6
- 2.Qxd6#
- 1...gxf4!
- threat
- 1.Qe5?
- threat
- 2.Qe4#
- 2.Qb5#
- 2.Qd5#
- 2.Qe8#
- 1...Bxd6
- 2.Qxd6#
- 1...Bc5
- 2.Qe4#
- 2.Qd5#
- 2.Qe8#
- 2.d5#
- 1...Ba6
- 2.Rxb6#
- 2.Qe4#
- 2.Qd5#
- 2.Qe8#
- 1...Bc8
- 2.Rxb6#
- 2.Qe4#
- 2.Qb5#
- 2.Qd5#
- 1...b5
- 2.Qe4#
- 2.Qxb5#
- 2.Qd5#
- 2.Qe8#
- 2.axb5#
- 1...Sf3+!
- threat
- 1.Qg2+?
- 1...Sf3+
- 2.Qxf3#
- 1...hxg2!
- 1...Sf3+
- 1.Qd3?
- threat
- 2.Qe4#
- 1...Sf3+
- 2.Qxf3#
- 1...Bxd6+!
- threat
- 1.Qe3?
- threat
- 2.Qe4#
- 2.Qe8#
- 2.d5#
- 1...Sf3+
- 2.Qxf3#
- 1...Bc8
- 2.Rxb6#
- 2.Qe4#
- 2.d5#
- 1...Bxd6+!
- threat
- 1.d7?
- threat
- 2.d8S#
- 1...Bd6
- 2.Qxd6#
- 1...Be7
- 2.Rxb6#
- 1...Sf3+!
- threat
- 1.Kxg1?
- Keys
- 1.Qc3!
- 1...Bxd6+
- 2.Se5#
- 1...Sf3+
- 2.Qxf3#
- 1...Bxc3
- 2.Rxb6#
- 1...Ba3
- 2.Rxb6#
- 1...Bc5
- 2.d5#
- 1...Ba6
- 2.Rxb6#
- 1...Ba8
- 2.Rxb6#
- 1...Bc8
- 2.Rxb6#
- 1...Se2
- 2.Qf3#
- 1...b5
- 2.axb5#
- 1...Bxd6+
- 1.Qc3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- B(c);OGATE::R1(C),XP(f)
- B(c);SBLOCK::P(G)
- B(c);OGATE,P_PINQ(D),XP(I)::QAR1(D),XB(c)
- B(h);OGATE::R1(K),XP(f)
- S(a);N_GUARD::QAB(D)
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- P(f);OGATE::P(E),XP(f)
- Tries
- Try
- K(B);S_FLIGHT,XS(a)
- Threat
- QAB(D)
- Vars
- B(c);OGATE,XP(I)::QAR1(D),XB(c)
- Refutation
- P(b);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- B(c);OGATE,XP(I)::QAR1(D),XB(c)
- B(c);OGATE::R1(C),XP(f)
- B(c);SBLOCK::P(G)
- B(h);OGATE::R1(K),XP(f)
- S(a);N_GUARD::QAB(D)
- S(a);N_GUARD::QAB(D),XS(a)
- P(f);OGATE::P(E),XP(f)
- Refutation
- P(b);
- Try
- B(H);CHECK
- Refutation
- S(a);CHECK,XB(H)
- Try
- B(H);
- Vars
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- B(c);OGATE,P_PINQ(D),XP(I)::QAR1(D),XB(c)
- B(c);OGATE::R1(C),XP(f)
- B(c);SBLOCK::P(G)
- B(h);OGATE::R1(K),XP(f)
- S(a);N_GUARD::QAB(D)
- P(f);OGATE::P(E),XP(f)
- Refutation
- P(e);
- Try
- B(H);
- Vars
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- B(c);OGATE,P_PINQ(D),XP(I)::QAR1(D),XB(c)
- B(c);OGATE::R1(C),XP(f)
- B(c);SBLOCK::P(G)
- B(h);OGATE::R1(K),XP(f)
- S(a);N_GUARD::QAB(D)
- P(f);OGATE::P(E),XP(f)
- Refutation
- P(e);
- Try
- R(C);
- Threat
- R(C)+S(F),DCHECK,XP(d)
- Vars
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- B(c);SBLOCK::P(G)
- P(f);OGATE::P(E),XP(f)
- Refutation
- B(c);XR(C)
- Try
- R(C);XB(c)
- Threat
- R1(C),XP(f)
- Vars
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- P(f);OGATE::P(E),XP(f)
- Refutation
- P(d);XR(C)
- Try
- Q(D);
- Threat
- P(G)
- Vars
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- Refutation
- B(c);CHECK,XP(I)
- Try
- Q(D);
- Threat
- QAB(D)
- Vars
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- B(c);OGATE,P_PINQ(D),XP(I)::QAR1(D),XB(c)
- Refutation
- P(e);XQ(D)
- Try
- Q(D);
- Threat
- DUALS(4)
- Vars
- B(c);OGATE,P_PINQ(D),XP(I)::QAR1(D),XB(c)
- Refutation
- S(a);CHECK
- Try
- Q(D);CHECK
- Vars
- S(a);CHECK,N_GUARD,P_SPINS(a)::QAB(D),XS(a)
- Refutation
- P(b);XQ(D)
- Try
- Q(D);
- Threat
- QAB(D)
- Vars
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- Refutation
- B(c);CHECK,XP(I)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- Refutation
- B(c);CHECK,XP(I)
- Try
- P(I);
- Threat
- P=S
- Vars
- B(c);N_GUARD,P_PINQ(D)::QAR1(D),XB(c)
- B(c);OGATE::R1(C),XP(f)
- Refutation
- S(a);CHECK
- Try
- Actual
- Q(D);
- Vars
- B(c);CHECK,SBLOCK,XP(I)::QAR(D)+S(F),DCHECK
- S(a);CHECK,N_GUARD::QAB(D),XS(a)
- B(c);OGATE,XQ(D)::R1(C),XP(f)
- B(c);OGATE::R1(C),XP(f)
- B(c);SBLOCK::P(G)
- B(h);OGATE::R1(K),XP(f)
- S(a);N_GUARD::QAB(D)
- P(f);OGATE::P(E),XP(f)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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