MESON Chess Problem Database
Problem Display
PID: 271985 (8/4pB1N/1Q1pP3/5k1P/2p5/p1B2Pb1/Pp2NpP1/5K1n w - - 0 1)
Clark, Cecil Henry Douglas
The Problemist, 1957
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Bh2
- 2.g4#
- 1...Bf4
- 2.g4#
- 1...Bh4
- 2.g4#
- 1...Be5
- 2.g4#
- 1...b1Q+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...d5
- 2.Bg6#
- 1...Bh2
- Tries
- 1.Bd4?
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...Bh2
- 2.g4#
- 1...Bf4
- 2.g4#
- 1...Bh4
- 2.g4#
- 1...Be5
- 2.g4#
- 1...d5
- 2.Bg6#
- 1...c3!
- 1...b1Q+
- 1.Bg7?
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...Bh2
- 2.g4#
- 1...Bf4
- 2.Sd4#
- 2.g4#
- 1...Bh4
- 2.g4#
- 1...Be5
- 2.g4#
- 1...d5
- 2.Bg6#
- 1...c3!
- 1...b1Q+
- 1.Bh8?
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...Bh2
- 2.g4#
- 1...Bf4
- 2.Sd4#
- 2.g4#
- 1...Bh4
- 2.g4#
- 1...Be5
- 2.g4#
- 1...d5
- 2.Bg6#
- 1...c3!
- 1...b1Q+
- 1.Bg8?
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...Bh2
- 2.g4#
- 1...Bf4
- 2.g4#
- 1...Bh4
- 2.g4#
- 1...Be5
- 2.g4#
- 1...d5!
- 1...b1Q+
- 1.Qa5+?
- 1...Be5
- 2.g4#
- 1...d5!
- 1...Be5
- 1.Qb3?
- threat
- 2.Qc2#
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...cxb3!
- threat
- 1.Qb4?
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...Bh2
- 2.g4#
- 1...Bf4
- 2.g4#
- 1...Bh4
- 2.g4#
- 1...Be5
- 2.g4#
- 1...d5!
- 1...b1Q+
- 1.Qb5+?
- 1...Be5
- 2.g4#
- 1...d5!
- 1...Be5
- 1.Qb7?
- threat
- 2.Qe4#
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...d5!
- threat
- 1.h6?
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...Bh2
- 2.g4#
- 1...Bf4
- 2.g4#
- 1...Bh4
- 2.g4#
- 1...Be5
- 2.g4#
- 1...d5!
- 1...b1Q+
- 1.Bd4?
- Keys
- 1.Qb8!
- 1...b1Q+
- 2.Qxb1#
- 1...b1R+
- 2.Qxb1#
- 1...b1S
- 2.Qxb1#
- 1...b1B
- 2.Qxb1#
- 1...d5
- 2.Sd4#
- 1...Bh2
- 2.g4#
- 1...Bf4
- 2.g4#
- 1...Bh4
- 2.g4#
- 1...Be5
- 2.g4#
- 1...b1Q+
- 1.Qb8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(e);OGATE::P(D)
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);OGATE::QAB(H),XS(b)
- P(b);OGATE::QAB(H),XB(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(h);::B(J)
- Tries
- Try
- B(E);
- Vars
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(b);OGATE::QAB(H),XS(b)
- P(b);OGATE::QAB(H),XB(b)
- B(e);OGATE::P(D)
- P(h);::B(J)
- Refutation
- P(f);
- Try
- B(E);
- Vars
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(b);OGATE::QAB(H),XS(b)
- P(b);OGATE::QAB(H),XB(b)
- B(e);OGATE::P(D)
- P(h);::B(J)
- Refutation
- P(f);
- Try
- B(E);
- Vars
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(b);OGATE::QAB(H),XS(b)
- P(b);OGATE::QAB(H),XB(b)
- B(e);OGATE::P(D)
- P(h);::B(J)
- Refutation
- P(f);
- Try
- B(J);
- Vars
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(b);OGATE::QAB(H),XS(b)
- P(b);OGATE::QAB(H),XB(b)
- B(e);OGATE::P(D)
- Refutation
- P(h);
- Try
- Q(H);CHECK
- Vars
- B(e);OGATE,P_SPINB(e)::P(D)
- Refutation
- P(h);P_SPINP(h)
- Try
- Q(H);
- Threat
- QAB(H)
- Vars
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(b);OGATE::QAB(H),XB(b)
- Refutation
- P(f);XQ(H)
- Try
- Q(H);
- Vars
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(b);OGATE::QAB(H),XS(b)
- P(b);OGATE::QAB(H),XB(b)
- B(e);OGATE::P(D)
- Refutation
- P(h);
- Try
- Q(H);CHECK
- Vars
- B(e);OGATE,P_SPINB(e)::P(D)
- Refutation
- P(h);P_SPINP(h)
- Try
- Q(H);
- Threat
- QAB1(H)
- Vars
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(b);OGATE::QAB(H),XB(b)
- Refutation
- P(h);
- Try
- P(G);
- Vars
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(b);OGATE::QAB(H),XS(b)
- P(b);OGATE::QAB(H),XB(b)
- B(e);OGATE::P(D)
- Refutation
- P(h);
- Try
- Actual
- Q(H);
- Vars
- P(b);CHECK,OGATE::QAB(H),XQ(b)
- P(b);CHECK,OGATE::QAB(H),XR(b)
- P(b);OGATE::QAB(H),XS(b)
- P(b);OGATE::QAB(H),XB(b)
- P(h);::S(C)
- B(e);OGATE::P(D)
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).