MESON Chess Problem Database
Problem Display
PID: 16519 (3b1B2/2p1r3/2P5/4p1Q1/5q2/6p1/B5R1/2k1K2R w K - 0 1)
Gunn, Robert Ivan
Chess, 1941
#2
7 + 7
SOLUTION
- SOUND
- Sets
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Qxg5
- 2.0-0#
- 1...Re6
- 2.Ba3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...Qd2+
- Tries
- 1.Bxe7?
- threat
- 2.Ba3#
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Bxe7!
- threat
- 1.Rf1?
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Re6
- 2.Ba3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...Qxg5!
- 1...Qd2+
- 1.Rhg1?
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Re6
- 2.Ba3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...Qxg5!
- 1...Qd2+
- 1.Rhh2?
- threat
- 2.Rc2#
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...gxh2!
- threat
- 1.Rh3?
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Re6
- 2.Ba3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...Qxg5!
- 1...Qd2+
- 1.Rh5?
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Re6
- 2.Ba3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...Qxg5!
- 1...Qd2+
- 1.Rh6?
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Re6
- 2.Ba3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...Qxg5!
- 1...Qd2+
- 1.Rh7?
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Rxh7
- 2.Ba3#
- 1...Re6
- 2.Ba3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...Qxg5!
- 1...Qd2+
- 1.Rh8?
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Re6
- 2.Ba3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...Qxg5!
- 1...Qd2+
- 1.Re2?
- 1...Qd2+
- 2.Qxd2#
- 1...Qxg5
- 2.0-0#
- 1...Re6
- 2.Ba3#
- 1...Qe3
- 2.Qxe3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...g2!
- 1...Qd2+
- 1.Qh6?
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Qxh6
- 2.Bxh6#
- 2.0-0#
- 1...Re6
- 2.Ba3#
- 1...Qg5
- 2.Qxg5#
- 2.0-0#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4!
- 1...Qd2+
- 1.Bxe7?
- Keys
- 1.Rh4!
- 1...Qd2+
- 2.Qxd2#
- 1...Qe3+
- 2.Qxe3#
- 1...Qxg5
- 2.Rc4#
- 1...Re6
- 2.Ba3#
- 1...Rd7
- 2.Ba3#
- 1...Rf7
- 2.Ba3#
- 1...Rg7
- 2.Ba3#
- 1...Rh7
- 2.Ba3#
- 1...Re8
- 2.Ba3#
- 1...e4
- 2.Qc5#
- 1...Qd2+
- 1.Rh4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- Q(c);N_SPINQ(c),XQ(E)::0-0
- R(f);OGATE::B(G)
- P(d);OGATE::QAR(E)
- Tries
- Try
- B(G);XR(f)
- Threat
- B(G)
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- Refutation
- B(g);XB(G)
- Try
- R(B);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- R(f);OGATE::B(G)
- P(d);OGATE::QAR(E)
- Refutation
- Q(c);N_SPINQ(c),XQ(E)
- Try
- R(B);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- R(f);OGATE::B(G)
- P(d);OGATE::QAR(E)
- Refutation
- Q(c);N_SPINQ(c),XQ(E)
- Try
- R(B);
- Threat
- R1(D)
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- Refutation
- P(b);XR(B)
- Try
- R(B);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- R(f);OGATE::B(G)
- P(d);OGATE::QAR(E)
- Refutation
- Q(c);N_SPINQ(c),XQ(E)
- Try
- R(B);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- R(f);OGATE::B(G)
- P(d);OGATE::QAR(E)
- Refutation
- Q(c);N_SPINQ(c),XQ(E)
- Try
- R(B);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- R(f);OGATE::B(G)
- P(d);OGATE::QAR(E)
- Refutation
- Q(c);N_SPINQ(c),XQ(E)
- Try
- R(B);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- R(f);OGATE,XR(B)::B(G)
- R(f);OGATE::B(G)
- P(d);OGATE::QAR(E)
- Refutation
- Q(c);N_SPINQ(c),XQ(E)
- Try
- R(B);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- R(f);OGATE::B(G)
- P(d);OGATE::QAR(E)
- Refutation
- Q(c);N_SPINQ(c),XQ(E)
- Try
- R(D);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);N_SPINQ(c),XQ(E)::0-0
- R(f);OGATE::B(G)
- Q(c);OGATE,P_PINR(D)::QAB(E),XQ(c)
- P(d);OGATE::QAR(E)
- Refutation
- P(b);
- Try
- Q(E);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- R(f);OGATE::B(G)
- Refutation
- P(d);
- Try
- Actual
- R(B);
- Vars
- Q(c);CHECK,OGATE::QAB1(E),XQ(c)
- Q(c);CHECK,OGATE::QAB(E),XQ(c)
- Q(c);N_SPINQ(c),OGATE,XQ(E)::R(B)
- R(f);OGATE::B(G)
- P(d);OGATE::QAR(E)
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).