MESON Chess Problem Database
Problem Display
PID: 16502 (5k2/2N1pP2/5R1P/1P1b4/1Q6/K7/8/8 w - - 0 1)
Coombes, TA
Chess, 1941
#2
7 + 3
SOLUTION
- SOUND
- Sets
- 1...Bh1
- 2.Se6#
- 1...Bg2
- 2.Se6#
- 1...Bf3
- 2.Se6#
- 1...Be4
- 2.Se6#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Bb7
- 2.Se6#
- 1...Ba8
- 2.Se6#
- 1...Bh1
- Tries
- 1.Qd2?
- 1...Bxf7
- 2.Qd8#
- 1...e5
- 2.Qb4#
- 1...e6
- 2.Qb4#
- 1...Ba2
- 2.Qd8#
- 1...Bh1
- 2.Se6#
- 2.Qd8#
- 1...Bg2
- 2.Se6#
- 2.Qd8#
- 1...Bb3
- 2.Qd8#
- 1...Bf3
- 2.Se6#
- 2.Qd8#
- 1...Bc4
- 2.Qd8#
- 1...Be4
- 2.Se6#
- 2.Qd8#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 2.Qd8#
- 1...Bb7
- 2.Se6#
- 2.Qd8#
- 1...Ba8
- 2.Se6#
- 2.Qd8#
- 1...exf6!
- 1...Bxf7
- 1.Qa5?
- 1...Bxf7
- 2.Qa8#
- 1...e5
- 2.Qb4#
- 1...e6
- 2.Qb4#
- 1...Ba2
- 2.Qa8#
- 1...Bh1
- 2.Se6#
- 1...Bg2
- 2.Se6#
- 1...Bb3
- 2.Qa8#
- 1...Bf3
- 2.Se6#
- 1...Bc4
- 2.Qa8#
- 1...Be4
- 2.Se6#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Bb7
- 2.Se6#
- 1...Ba8
- 2.Se6#
- 2.Qxa8#
- 1...exf6!
- 1...Bxf7
- 1.Qd6?
- threat
- 2.Qd8#
- 1...Bc6
- 2.Se6#
- 1...exd6!
- threat
- 1.Qa4?
- 1...Bxf7
- 2.Qa8#
- 1...e5
- 2.Qb4#
- 1...e6
- 2.Qb4#
- 1...Ba2
- 2.Qa8#
- 1...Bh1
- 2.Se6#
- 1...Bg2
- 2.Se6#
- 1...Bb3
- 2.Qa8#
- 1...Bf3
- 2.Se6#
- 1...Bc4
- 2.Qa8#
- 1...Be4
- 2.Se6#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Bb7
- 2.Se6#
- 1...Ba8
- 2.Se6#
- 2.Qxa8#
- 1...exf6!
- 1...Bxf7
- 1.Qd4?
- 1...Bxf7
- 2.Qd8#
- 1...e5
- 2.Qc5#
- 2.Qb4#
- 1...e6
- 2.Qc5#
- 2.Qb4#
- 1...Ba2
- 2.Qd8#
- 1...Bh1
- 2.Se6#
- 2.Qd8#
- 1...Bg2
- 2.Se6#
- 2.Qd8#
- 1...Bb3
- 2.Qd8#
- 1...Bf3
- 2.Se6#
- 2.Qd8#
- 1...Bc4
- 2.Qd8#
- 1...Be4
- 2.Se6#
- 2.Qd8#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 2.Qd8#
- 1...Bb7
- 2.Se6#
- 2.Qd8#
- 1...Ba8
- 2.Se6#
- 2.Qd8#
- 1...exf6!
- 1...Bxf7
- 1.Qg4?
- threat
- 2.Qc8#
- 2.Qg7#
- 2.Qg8#
- 1...Bxf7
- 2.Qc8#
- 2.Qg7#
- 1...e5
- 2.Qb4#
- 1...e6
- 2.Qb4#
- 1...Bc6
- 2.Se6#
- 2.Qg7#
- 2.Qg8#
- 1...Be6
- 2.Sxe6#
- 2.Qg7#
- 2.Qg8#
- 1...Bb7
- 2.Se6#
- 2.Qg7#
- 2.Qg8#
- 1...exf6!
- threat
- 1.Qd2?
- Keys
- 1.Qe4!
- 1...Bxe4
- 2.Se6#
- 1...Bxf7
- 2.Qa8#
- 1...exf6
- 2.Qe8#
- 1...e5
- 2.Qb4#
- 1...e6
- 2.Qb4#
- 1...Ba2
- 2.Qa8#
- 1...Bb3
- 2.Qa8#
- 1...Bc4
- 2.Qa8#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Bb7
- 2.Se6#
- 1...Ba8
- 2.Se6#
- 2.Qxa8#
- 1...Bxe4
- 1.Qe4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 4
- Sets
- B(a);N_GUARD::S(F)
- B(a);N_GUARD::S(F),XB(a)
- Tries
- Try
- Q(B);N_PINP(b)
- Vars
- B(a);OGATE,P_SPINB(a),XP(G)::QAR2(B)
- P(b);OGATEB::QAB(B)
- B(a);OGATE::QAR2(B)
- B(a);N_GUARD::S(F)
- Refutation
- P(b);XR(D)
- Try
- Q(B);N_PINP(b)
- Vars
- B(a);N_GUARD,P_SPINB(a),XP(G)::QAR(B)
- P(b);OGATEB::QAB(B)
- B(a);N_GUARD::QAR(B)
- B(a);N_GUARD::S(F)
- B(a);N_GUARD::S(F),XB(a)
- Refutation
- P(b);XR(D)
- Try
- Q(B);
- Threat
- QAR2(B)
- Vars
- B(a);N_GUARD::S(F)
- Refutation
- P(b);N_SPINP(b),XQ(B)
- Try
- Q(B);N_PINP(b)
- Vars
- B(a);N_GUARD,P_SPINB(a),XP(G)::QAR(B)
- P(b);OGATEB::QAB(B)
- B(a);N_GUARD::QAR(B)
- B(a);N_GUARD::S(F)
- B(a);N_GUARD::S(F),XB(a)
- Refutation
- P(b);XR(D)
- Try
- Q(B);N_PINP(b)
- Vars
- B(a);OGATE,P_SPINB(a),XP(G)::QAR2(B)
- B(a);OGATE::QAR2(B)
- B(a);N_GUARD::S(F)
- Refutation
- P(b);XR(D)
- Try
- Q(B);N_PINP(b)
- Threat
- DUALS(3)
- Vars
- P(b);OGATEB::QAB(B)
- Refutation
- P(b);XR(D)
- Try
- Actual
- Q(B);N_PINP(b)
- Vars
- B(a);N_GUARD,XQ(B)::S(F)
- B(a);OGATE,P_SPINB(a),XP(G)::QAR(B)
- P(b);OGATE,XR(D)::QAR1(B)
- P(b);OGATEB::QAB(B)
- B(a);OGATE::QAR(B)
- B(a);N_GUARD::S(F)
- B(a);N_GUARD::S(F),XB(a)
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).