MESON Chess Problem Database
Problem Display
PID: 154125 (3BK3/2Q2P2/4P1bp/3PNk1r/4q1Np/4P2P/2B5/8 w - - 0 1)
Goulty, Allison Howard
Harley, Brian
The Observer, 1954
(First published on Fri Sep 26 1952)
#2
11 + 6
| 15290 | Harley Scrapbook | 2015 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxc2
- 2.Qxc2#
- 1...Qd3
- 2.Bxd3#
- 1...Rg5
- 2.Sxh6#
- 1...Bxf7+
- 2.Qxf7#
- 1...Bh7
- 2.f8Q#
- 2.f8R#
- 1...Qxc2
- Tries
- 1.Kd7?
- 1...Qxc2
- 2.Qxc2#
- 1...Qd3
- 2.Bxd3#
- 1...Rg5
- 2.Sxh6#
- 1...Bh7
- 2.f8Q#
- 2.f8R#
- 1...Bxf7!
- 1...Qxc2
- 1.Kf8?
- 1...Qxc2
- 2.Qxc2#
- 1...Bxf7
- 2.Qxf7#
- 1...Qd3
- 2.Bxd3#
- 1...Rg5
- 2.Sxh6#
- 1...Bh7!
- 1...Qxc2
- 1.Sf3?
- threat
- 2.Sd4#
- 2.Qf4#
- 2.Qe5#
- 1...Bxf7+
- 2.Qxf7#
- 1...Qxc2
- 2.Qf4#
- 2.Qe5#
- 2.Qxc2#
- 1...Qd3
- 2.Bxd3#
- 2.Qf4#
- 2.Qe5#
- 1...Bh7!
- threat
- 1.Sc4?
- threat
- 2.Sd6#
- 2.Qf4#
- 2.Qe5#
- 1...Bxf7+
- 2.Qxf7#
- 1...Bh7!
- threat
- 1.Sc6?
- threat
- 2.Sd4#
- 2.Qf4#
- 2.Qe5#
- 1...Bxf7+
- 2.Qxf7#
- 1...Qxc2
- 2.Qf4#
- 2.Qe5#
- 1...Qd3
- 2.Bxd3#
- 2.Qf4#
- 2.Qe5#
- 1...Bh7!
- threat
- 1.Sxg6?
- 1...Qxc2
- 2.Qxc2#
- 1...Qd3
- 2.Bxd3#
- 1...Rg5
- 2.Sxh4#
- 2.Se7#
- 1...Kxg6!
- 1...Qxc2
- 1.Bb1?
- 1...Bxf7+
- 2.Qxf7#
- 1...Qc2
- 2.Bxc2#
- 2.Qxc2#
- 1...Qd3
- 2.Bxd3#
- 1...Rg5
- 2.Sxh6#
- 1...Bh7
- 2.f8Q#
- 2.f8R#
- 1...Qxb1!
- 1...Bxf7+
- 1.Bd3?
- 1...Bxf7+
- 2.Qxf7#
- 1...Rg5
- 2.Sxh6#
- 1...Bh7
- 2.f8Q#
- 2.f8R#
- 1...Qxd3!
- 1...Bxf7+
- 1.Be7?
- 1...Qxc2
- 2.Qxc2#
- 1...Qd3
- 2.Bxd3#
- 1...Rg5
- 2.Sxh6#
- 1...Bh7
- 2.f8Q#
- 2.f8R#
- 1...Bxf7+!
- 1...Qxc2
- 1.Qc3?
- 1...Qxc2
- 2.Qxc2#
- 1...Qd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Rg5
- 2.Sxh6#
- 1...Bh7
- 2.f8Q#
- 2.f8R#
- 1...Bxf7+!
- 1...Qxc2
- 1.Qc4?
- threat
- 2.Bxe4#
- 2.Qf1#
- 2.Qxe4#
- 1...Qxc2
- 2.Qxc2#
- 2.Qf4#
- 1...Qd3
- 2.Bxd3#
- 2.Qxd3#
- 2.Qf4#
- 1...Bxf7+!
- threat
- 1.Qd7?
- 1...Bxf7+
- 2.Qxf7#
- 2.exf7#
- 1...Qd3
- 2.Bxd3#
- 1...Rg5
- 2.e7#
- 1...Bh7
- 2.f8Q#
- 2.f8R#
- 1...Qxc2!
- 1...Bxf7+
- 1.Qe7?
- threat
- 2.Qf6#
- 1...Bxf7+
- 2.Qxf7#
- 1...Qd3
- 2.Bxd3#
- 1...Qxc2!
- threat
- 1.Kd7?
- Keys
- 1.Qc8!
- 1...Bxf7+
- 2.exf7#
- 1...Qxc2
- 2.Qxc2#
- 1...Qd3
- 2.Bxd3#
- 1...Rg5
- 2.e7#
- 1...Bh7
- 2.f8Q#
- 2.f8R#
- 1...Bxf7+
- 1.Qc8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(H),XQ(a)
- Q(a);OGATEB::B(A),XQ(a)
- R(d);N_GUARD::S(D),XP(f)
- B(e);CHECK,OGATE,XP(I)::QAR2(H),XB(e)
- B(e);N_PINP(I)::P=Q
- Tries
- Try
- K(K);N_SPINP(I),S_FLIGHT
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(H),XQ(a)
- Q(a);OGATEB,P_PINP(E)::B(A),XQ(a)
- R(d);N_GUARD::S(D),XP(f)
- B(e);N_GUARD::P=Q
- Refutation
- B(e);XP(I)
- Try
- K(K);N_SPINP(I),P-FLIGHT
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(H),XQ(a)
- B(e);OGATE,XP(I)::QAR2(H),XB(e)
- Q(a);OGATEB::B(A),XQ(a)
- R(d);N_GUARD::S(D),XP(f)
- Refutation
- B(e);
- Try
- S(F);N_SPINP(I),P_SPINP(G)
- Threat
- DUALS(3)
- Vars
- B(e);CHECK,OGATE,XP(I)::QAR2(H),XB(e)
- Refutation
- B(e);
- Try
- S(F);N_SPINP(I),P_SPINP(G)
- Threat
- DUALS(3)
- Vars
- B(e);CHECK,OGATE,XP(I)::QAR2(H),XB(e)
- Refutation
- B(e);
- Try
- S(F);N_SPINP(I),P_SPINP(G)
- Threat
- DUALS(3)
- Vars
- B(e);CHECK,OGATE,XP(I)::QAR2(H),XB(e)
- Refutation
- B(e);
- Try
- S(F);N_SPINP(I),P_SPINP(G),XB(e)
- Vars
- Q(a);N_PINP(G),N_SPINQ(a),OGATE,XB(A)::QAB(H),XQ(a)
- Q(a);N_PINP(G),OGATEB::B(A),XQ(a)
- Refutation
- K(c);S_FLIGHT,XS(F)
- Try
- B(A);
- Vars
- B(e);CHECK,OGATE,XP(I)::QAR2(H),XB(e)
- Q(a);OGATEB::B(A),XQ(a)
- R(d);N_GUARD::S(D),XP(f)
- B(e);N_PINP(I)::P=Q
- Refutation
- Q(a);N_SPINQ(a),XB(A)
- Try
- B(A);
- Vars
- B(e);CHECK,OGATE,XP(I)::QAR2(H),XB(e)
- R(d);N_GUARD::S(D),XP(f)
- B(e);N_PINP(I)::P=Q
- Refutation
- Q(a);N_SPINQ(a),XB(A)
- Try
- B(J);
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(H),XQ(a)
- Q(a);OGATEB::B(A),XQ(a)
- R(d);N_GUARD::S(D),XP(f)
- B(e);N_PINP(I)::P=Q
- Refutation
- B(e);CHECK,XP(I)
- Try
- Q(H);
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(H),XQ(a)
- R(d);N_GUARD::S(D),XP(f)
- B(e);N_PINP(I)::P=Q
- Refutation
- B(e);CHECK,XP(I)
- Try
- Q(H);
- Threat
- DUALS(3)
- Refutation
- B(e);CHECK,XP(I)
- Try
- Q(H);
- Vars
- Q(a);OGATEB::B(A),XQ(a)
- R(d);SBLOCK::QAB(H)+P(G)
- B(e);N_PINP(I)::P=Q
- Refutation
- Q(a);N_SPINQ(a),XB(A)
- Try
- Q(H);
- Threat
- QAR1(H)
- Vars
- B(e);CHECK,OGATE,XP(I)::QAR2(H),XB(e)
- Q(a);OGATEB::B(A),XQ(a)
- Refutation
- Q(a);N_SPINQ(a),XB(A)
- Try
- Actual
- Q(H);
- Vars
- B(e);CHECK,OGATE,XP(I)::QAB(H)+P(G),XB(e)
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(H),XQ(a)
- Q(a);OGATEB::B(A),XQ(a)
- R(d);SBLOCK::QAB(H)+P(G)
- B(e);N_PINP(I)::P=Q
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).