MESON Chess Problem Database
Problem Display
PID: 268547 (k1b5/pqB5/Q1B5/K7/8/8/8/8 w - - 0 1)
Ellison, Wallace D
British Chess Magazine, 1934
#2
4 + 4
SOLUTION
- SOUND
- Sets
- 1...Qxc6
- 2.Qxc8#
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qxc6
- Tries
- 1.Ka4?
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Qxb7#
- 1...Qxc6+!
- 1...Bh3
- 1.Bh1?
- 1...Qxh1
- 2.Qxc8#
- 1...Qg2
- 2.Qxc8#
- 1...Qf3
- 2.Qxc8#
- 1...Qe4
- 2.Qxc8#
- 1...Qc6
- 2.Qxc8#
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qd5+!
- 1...Qxh1
- 1.Bg2?
- 1...Qxg2
- 2.Qxc8#
- 1...Qf3
- 2.Qxc8#
- 1...Qe4
- 2.Qxc8#
- 1...Qc6
- 2.Qxc8#
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qd5+!
- 1...Qxg2
- 1.Bf3?
- 1...Qxf3
- 2.Qxc8#
- 1...Qe4
- 2.Qxc8#
- 1...Qc6
- 2.Qxc8#
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qd5+!
- 1...Qxf3
- 1.Be4?
- 1...Qxe4
- 2.Qxc8#
- 1...Qc6
- 2.Qxc8#
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qd5+!
- 1...Qxe4
- 1.Bd5?
- 1...Qc6
- 2.Qxc8#
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qxd5+!
- 1...Qc6
- 1.Bh2?
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qxc6!
- 1...Bh3
- 1.Bg3?
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qxc6!
- 1...Bh3
- 1.Bf4?
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qxc6!
- 1...Bh3
- 1.Be5?
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qxc6!
- 1...Bh3
- 1.Bd6?
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qxc6!
- 1...Bh3
- 1.Qb6?
- 1...Qxc6
- 2.Qb8#
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...a6
- 2.Qxa6#
- 1...axb6+!
- 1...Qxc6
- 1.Ka4?
- Keys
- 1.Qb5!
- 1...Qxc6
- 2.Qb8#
- 1...a6
- 2.Qxa6#
- 1...Bh3
- 2.Bxb7#
- 2.Qxb7#
- 1...Bg4
- 2.Bxb7#
- 2.Qxb7#
- 1...Bf5
- 2.Bxb7#
- 2.Qxb7#
- 1...Be6
- 2.Bxb7#
- 2.Qxb7#
- 1...Bd7
- 2.Bxb7#
- 2.Qxb7#
- 1...Qxc6
- 1.Qb5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAR2(B),XB(d)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- B(d);N_GUARD,P_PINB(C)::QAB1(B),XQ(b)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XB(C)
- Try
- B(C);
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAR2(B),XB(d)
- Q(b);OGATE::QAR2(B),XB(d)
- Refutation
- Q(b);CHECK
- Try
- B(C);
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAR2(B),XB(d)
- Q(b);OGATE::QAR2(B),XB(d)
- Refutation
- Q(b);CHECK
- Try
- B(C);
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAR2(B),XB(d)
- Q(b);OGATE::QAR2(B),XB(d)
- Refutation
- Q(b);CHECK
- Try
- B(C);
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAR2(B),XB(d)
- Q(b);OGATE::QAR2(B),XB(d)
- Refutation
- Q(b);CHECK
- Try
- B(C);
- Vars
- Q(b);OGATE::QAR2(B),XB(d)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XB(C)
- Try
- B(D);
- Refutation
- Q(b);N_SPINQ(b),XB(C)
- Try
- B(D);
- Refutation
- Q(b);N_SPINQ(b),XB(C)
- Try
- B(D);
- Refutation
- Q(b);N_SPINQ(b),XB(C)
- Try
- B(D);
- Refutation
- Q(b);N_SPINQ(b),XB(C)
- Try
- B(D);
- Refutation
- Q(b);N_SPINQ(b),XB(C)
- Try
- Q(B);N_PINP(a)
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAR1(B)
- P(a);OGATEB::QAR2(B),XP(a)
- Refutation
- P(a);CHECK,XQ(B)
- Try
- Actual
- Q(B);N_PINP(a)
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAR1(B)
- P(a);OGATEB::QAR2(B),XP(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).