MESON Chess Problem Database
Problem Display
PID: 196694 (8/7n/7Q/4pPnb/3p1k1N/KP2qp1P/3B1N2/4R1R1 w - - 0 1)
Watson, George
Morning Post, 1919
#2
10 + 8
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qxd2
- 2.Re4#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Be8
- 2.Rg4#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...d3
- 2.Bxe3#
- 1...e4
- 2.Qd6#
- 1...Qxd2
- Tries
- 1.Ka2?
- 1...e4
- 2.Qd6#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Be8
- 2.Rg4#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...d3
- 2.Bxe3#
- 1...Qxd2+!
- 1...e4
- 1.Kb2?
- 1...e4
- 2.Qd6#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Be8
- 2.Rg4#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...d3
- 2.Bxe3#
- 1...Qxd2+!
- 1...e4
- 1.Ka4?
- 1...Qxd2
- 2.Re4#
- 1...e4
- 2.Qd6#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...d3
- 2.Bxe3#
- 1...Be8+!
- 1...Qxd2
- 1.Kb4?
- 1...e4
- 2.Qd6#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Be8
- 2.Rg4#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...d3
- 2.Bxe3#
- 1...Qxd2+!
- 1...e4
- 1.Bc1?
- 1...e4
- 2.Qd6#
- 1...Qd2
- 2.Sd3#
- 2.Bxd2#
- 2.Re4#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Be8
- 2.Rg4#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...d3
- 2.Bxe3#
- 1...Qxc1+!
- 1...e4
- 1.Re2?
- 1...Qxd2
- 2.Re4#
- 1...e4
- 2.Qd6#
- 1...d3
- 2.Bxe3#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Be8
- 2.Rg4#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...fxe2!
- 1...Qxd2
- 1.Rxe3?
- threat
- 2.Sd3#
- 2.Ree1#
- 2.Re2#
- 2.Rc3#
- 2.Rd3#
- 2.Rxf3#
- 2.Re4#
- 1...e4
- 2.Rxe4#
- 2.Qd6#
- 1...d3
- 2.Sxd3#
- 2.Ree1#
- 2.Re2#
- 2.Rxd3#
- 2.Rxf3#
- 2.Re4#
- 1...dxe3!
- threat
- 1.Rg2?
- 1...Qxd2
- 2.Re4#
- 1...e4
- 2.Qd6#
- 1...d3
- 2.Bxe3#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Be8
- 2.Rg4#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...fxg2!
- 1...Qxd2
- 1.Qxh5?
- threat
- 2.Rg4#
- 2.Qg4#
- 1...Sf6
- 2.Qxg5#
- 1...e4!
- threat
- 1.Qc6?
- threat
- 2.Sd3#
- 1...e4
- 2.Qd6#
- 2.Qc7#
- 1...d3
- 2.Sxd3#
- 2.Bxe3#
- 1...Qxd2!
- threat
- 1.Qg6?
- 1...Bxg6
- 2.Rg4#
- 1...Sxh3
- 2.Qg3#
- 1...e4
- 2.Qd6#
- 1...d3
- 2.Bxe3#
- 1...Bg4
- 2.Rxg4#
- 1...Se4
- 2.Sd3#
- 1...Se6
- 2.Qg3#
- 1...Sf7
- 2.Qg3#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...Qxd2!
- 1...Bxg6
- 1.f6?
- 1...Qxd2
- 2.Re4#
- 1...Sxf6
- 2.Qxg5#
- 2.Qxf6#
- 1...d3
- 2.Bxe3#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Be8
- 2.Rg4#
- 1...Sf8
- 2.Qxg5#
- 1...e4!
- 1...Qxd2
- 1.Ka2?
- Keys
- 1.Qg7!
- 1...Qxd2
- 2.Qxe5#
- 1...Sxh3
- 2.Qg3#
- 1...d3
- 2.Bxe3#
- 1...Bg4
- 2.Rxg4#
- 1...Bg6
- 2.Rg4#
- 1...Bf7
- 2.Rg4#
- 1...Be8
- 2.Rg4#
- 1...Se4
- 2.Sd3#
- 1...Se6
- 2.Qg3#
- 1...Sf7
- 2.Qg3#
- 1...Sf6
- 2.Qxg5#
- 1...Sf8
- 2.Qxg5#
- 1...e4
- 2.Qc7#
- 1...Qxd2
- 1.Qg7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Q(a);N_PINP(F),N_SPINQ(a),OGATE,XB(C)::R1(A)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- S(h);N_GUARD::QAB1(J),XS(f)
- P(c);N_GUARD,N_PINP(F)::B(C),XQ(a)
- P(e);OGATEB::QAB(J)
- Tries
- Try
- K(E);N_SPINP(F),P-FLIGHT
- Vars
- P(e);OGATEB::QAB(J)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- B(g);N_GUARD,P_PINP(F)::R1(B)
- S(h);N_GUARD::QAB1(J),XS(f)
- P(c);N_GUARD::B(C),XQ(a)
- Refutation
- Q(a);CHECK,N_SPINQ(a),XB(C)
- Try
- K(E);N_SPINP(F),S_FLIGHT
- Vars
- P(e);OGATEB::QAB(J)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- S(h);N_GUARD::QAB1(J),XS(f)
- P(c);N_GUARD::B(C),XQ(a)
- Refutation
- Q(a);CHECK,N_SPINQ(a),XB(C)
- Try
- K(E);N_SPINP(F),P-FLIGHT
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(C)::R1(A)
- P(e);OGATEB::QAB(J)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- S(h);N_GUARD::QAB1(J),XS(f)
- P(c);N_GUARD::B(C),XQ(a)
- Refutation
- B(g);CHECK
- Try
- K(E);N_SPINP(F),S_FLIGHT
- Vars
- P(e);OGATEB::QAB(J)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- S(h);N_GUARD::QAB1(J),XS(f)
- P(c);N_GUARD::B(C),XQ(a)
- Refutation
- Q(a);CHECK,N_SPINQ(a),XB(C)
- Try
- B(C);
- Vars
- P(e);OGATEB::QAB(J)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- S(h);N_GUARD::QAB1(J),XS(f)
- P(c);N_GUARD,N_PINP(F)::B(C),XQ(a)
- Refutation
- Q(a);CHECK,N_PINP(F),N_SPINQ(a),XB(C)
- Try
- R(A);
- Vars
- Q(a);N_PINP(F),N_SPINQ(a),OGATE,XB(C)::R1(A)
- P(e);OGATEB::QAB(J)
- P(c);N_GUARD,N_PINP(F)::B(C),XQ(a)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- S(h);N_GUARD::QAB1(J),XS(f)
- Refutation
- P(b);XR(A)
- Try
- R(A);N_SPINP(F),XQ(a)
- Threat
- DUALS(7)
- Refutation
- P(c);P_SPINP(c),XR(A)
- Try
- R(B);
- Vars
- Q(a);N_PINP(F),N_SPINQ(a),OGATE,XB(C)::R1(A)
- P(e);OGATEB::QAB(J)
- P(c);N_GUARD,N_PINP(F)::B(C),XQ(a)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- S(h);N_GUARD::QAB1(J),XS(f)
- Refutation
- P(b);XR(B)
- Try
- Q(J);N_PINS(f),XB(g)
- Threat
- DUALS(2)
- Vars
- S(h);N_GUARD::QAB1(J),XS(f)
- Refutation
- P(e);
- Try
- Q(J);N_PINS(f)
- Threat
- S(D)
- Refutation
- Q(a);N_PINP(F),N_SPINQ(a),XB(C)
- Try
- Q(J);N_PINS(f)
- Vars
- B(g);N_GUARD,XQ(J)::R1(B)
- S(f);OGATE,XP(G)::QAB1(J)
- P(e);OGATEB::QAB(J)
- P(c);N_GUARD,N_PINP(F)::B(C),XQ(a)
- B(g);N_GUARD::R1(B),XB(g)
- S(f);SBLOCK::S(D)
- S(f);OGATE::QAB1(J)
- S(h);N_GUARD::QAB1(J),XS(f)
- Refutation
- Q(a);N_PINP(F),N_SPINQ(a),XB(C)
- Try
- P(I);
- Vars
- Q(a);N_PINP(F),N_SPINQ(a),OGATE,XB(C)::R1(A)
- P(c);N_GUARD,N_PINP(F)::B(C),XQ(a)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- S(h);N_GUARD::QAB1(J),XS(f)
- Refutation
- P(e);
- Try
- Actual
- Q(J);N_PINS(f)
- Vars
- Q(a);N_PINP(F),N_SPINQ(a),XB(C)::QAB1(J),XP(e)
- S(f);OGATE,XP(G)::QAB1(J)
- P(c);N_GUARD,N_PINP(F)::B(C),XQ(a)
- B(g);N_GUARD::R1(B),XB(g)
- B(g);N_GUARD::R1(B)
- S(f);SBLOCK::S(D)
- S(f);OGATE::QAB1(J)
- S(h);N_GUARD::QAB1(J),XS(f)
- P(e);OGATEB::QAB(J)
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).