MESON Chess Problem Database
Problem Display
PID: 51358 (8/2Np4/6N1/1p1rpkBK/1q5p/5P1P/7Q/8 w - - 0 1)
Lewis, Robert Tony
Manchester Guardian, 1958
#2
7 + 7
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Se7#
- 1...Qd2
- 2.Sxh4#
- 2.Se7#
- 1...Qa3
- 2.Sxh4#
- 1...Qc3
- 2.Sxh4#
- 2.Se7#
- 1...Qa5
- 2.Sxh4#
- 2.Se7#
- 1...Qc5
- 2.Sxh4#
- 1...Qd6
- 2.Sxh4#
- 1...Qe7
- 2.Sxh4#
- 2.Sxe7#
- 1...Qf8
- 2.Sxh4#
- 1...Qb1
- 2.Sxh4#
- 2.Se7#
- 1...Qb2
- 2.Sxh4#
- 2.Se7#
- 1...Qb3
- 2.Sxh4#
- 2.Se7#
- 1...Qa4
- 2.Se7#
- 1...Qc4
- 2.Se7#
- 1...Qd4
- 2.Se7#
- 1...Qe4
- 2.Se7#
- 1...Qf4
- 2.Se7#
- 1...Qg4+
- 2.hxg4#
- 1...Rd1
- 2.Qxe5#
- 1...Rd2
- 2.Qxe5#
- 1...Rd3
- 2.Qxe5#
- 1...Rd4
- 2.Qxe5#
- 1...Rc5
- 2.Se7#
- 1...Rd6
- 2.Se7#
- 2.Qxe5#
- 1...e4
- 2.Sxh4#
- 2.Qf4#
- 1...d6
- 2.Se7#
- 1...Qe1
- Tries
- 1.Qg3?
- 1...Qg4+
- 2.Qxg4#
- 2.hxg4#
- 1...Qe1
- 2.Sxh4#
- 2.Se7#
- 2.Qg4#
- 1...Qd2
- 2.Sxh4#
- 2.Se7#
- 2.Qg4#
- 1...Qa3
- 2.Sxh4#
- 2.Qg4#
- 1...Qc3
- 2.Sxh4#
- 2.Se7#
- 2.Qg4#
- 1...Qa5
- 2.Sxh4#
- 2.Se7#
- 2.Qg4#
- 1...Qc5
- 2.Sxh4#
- 2.Qg4#
- 1...Qd6
- 2.Sxh4#
- 2.Qg4#
- 1...Qe7
- 2.Sxh4#
- 2.Sxe7#
- 2.Qg4#
- 1...Qf8
- 2.Sxh4#
- 2.Qg4#
- 1...Qb1
- 2.Sxh4#
- 2.Se7#
- 2.Qg4#
- 1...Qb2
- 2.Sxh4#
- 2.Se7#
- 2.Qg4#
- 1...Qb3
- 2.Sxh4#
- 2.Se7#
- 2.Qg4#
- 1...Qa4
- 2.Se7#
- 1...Qc4
- 2.Se7#
- 1...Qd4
- 2.Se7#
- 1...Qe4
- 2.Se7#
- 1...Qf4
- 2.Se7#
- 1...Rd1
- 2.Qxe5#
- 1...Rd2
- 2.Qxe5#
- 1...Rd3
- 2.Qxe5#
- 1...Rd4
- 2.Qxe5#
- 1...Rc5
- 2.Se7#
- 1...Rd6
- 2.Se7#
- 2.Qxe5#
- 1...e4
- 2.Sxh4#
- 2.Qf4#
- 2.Qg4#
- 1...d6
- 2.Se7#
- 1...hxg3!
- 1...Qg4+
- 1.Qf4+?
- 1...Qxf4
- 2.Se7#
- 1...exf4!
- 1...Qxf4
- 1.Qb2?
- 1...Qg4+
- 2.hxg4#
- 1...Qxb2
- 2.Sxh4#
- 2.Se7#
- 1...Qe1
- 2.Se7#
- 1...Qd2
- 2.Sxh4#
- 2.Se7#
- 1...Qa3
- 2.Sxh4#
- 1...Qc3
- 2.Sxh4#
- 2.Se7#
- 1...Qa5
- 2.Sxh4#
- 2.Se7#
- 1...Qc5
- 2.Sxh4#
- 1...Qd6
- 2.Sxh4#
- 1...Qe7
- 2.Sxh4#
- 2.Sxe7#
- 1...Qf8
- 2.Sxh4#
- 1...Qb3
- 2.Sxh4#
- 2.Se7#
- 1...Qa4
- 2.Se7#
- 1...Qc4
- 2.Se7#
- 1...Qd4
- 2.Se7#
- 1...Qe4
- 2.Se7#
- 1...Qf4
- 2.Se7#
- 1...Rd1
- 2.Qxe5#
- 1...Rd2
- 2.Qxe5#
- 1...Rd3
- 2.Qxe5#
- 1...Rc5
- 2.Se7#
- 1...Rd6
- 2.Se7#
- 2.Qxe5#
- 1...e4
- 2.Sxh4#
- 2.Qf6#
- 1...d6
- 2.Se7#
- 1...Rd4!
- 1...Qg4+
- 1.Qe2?
- 1...Qg4+
- 2.fxg4#
- 2.hxg4#
- 1...Qe1
- 2.Se7#
- 1...Qd2
- 2.Sxh4#
- 2.Se7#
- 2.Qe4#
- 1...Qa3
- 2.Sxh4#
- 2.Qe4#
- 1...Qc3
- 2.Sxh4#
- 2.Se7#
- 2.Qe4#
- 1...Qa5
- 2.Sxh4#
- 2.Se7#
- 2.Qe4#
- 1...Qc5
- 2.Sxh4#
- 2.Qe4#
- 1...Qd6
- 2.Sxh4#
- 2.Qe4#
- 1...Qe7
- 2.Sxh4#
- 2.Sxe7#
- 2.Qe4#
- 1...Qf8
- 2.Sxh4#
- 2.Qe4#
- 1...Qb1
- 2.Sxh4#
- 2.Se7#
- 1...Qb2
- 2.Sxh4#
- 2.Se7#
- 2.Qe4#
- 1...Qb3
- 2.Sxh4#
- 2.Se7#
- 2.Qe4#
- 1...Qa4
- 2.Se7#
- 1...Qc4
- 2.Se7#
- 1...Qd4
- 2.Se7#
- 1...Qe4
- 2.Se7#
- 2.Qxe4#
- 2.fxe4#
- 1...Qf4
- 2.Se7#
- 1...Rd1
- 2.Qxe5#
- 1...Rd2
- 2.Qxe5#
- 1...Rd3
- 2.Qxe5#
- 1...Rd4
- 2.Qxe5#
- 1...Rc5
- 2.Se7#
- 1...Rd6
- 2.Se7#
- 2.Qxe5#
- 1...d6
- 2.Se7#
- 1...e4!
- 1...Qg4+
- 1.Qg3?
- Keys
- 1.Qa2!
- 1...Qg4+
- 2.hxg4#
- 1...Qe1
- 2.Se7#
- 1...Qd2
- 2.Sxh4#
- 2.Se7#
- 1...Qa3
- 2.Sxh4#
- 1...Qc3
- 2.Sxh4#
- 2.Se7#
- 1...Qa5
- 2.Sxh4#
- 2.Se7#
- 1...Qc5
- 2.Sxh4#
- 1...Qd6
- 2.Sxh4#
- 1...Qe7
- 2.Sxh4#
- 2.Sxe7#
- 1...Qf8
- 2.Sxh4#
- 1...Qb1
- 2.Sxh4#
- 2.Se7#
- 1...Qb2
- 2.Sxh4#
- 2.Se7#
- 1...Qb3
- 2.Sxh4#
- 2.Se7#
- 1...Qa4
- 2.Se7#
- 1...Qc4
- 2.Se7#
- 1...Qd4
- 2.Se7#
- 1...Qe4
- 2.Se7#
- 1...Qf4
- 2.Se7#
- 1...Rd1
- 2.Qf7#
- 1...Rd2
- 2.Qf7#
- 1...Rd3
- 2.Qf7#
- 1...Rd4
- 2.Qf7#
- 1...Rc5
- 2.Se7#
- 2.Qf7#
- 1...Rd6
- 2.Se7#
- 1...e4
- 2.Qxd5#
- 1...d6
- 2.Se7#
- 1...Qg4+
- 1.Qa2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(a);N_GUARD::S(F)
- Q(a);N_GUARD::S(F),XP(b)
- Q(a);CHECK,OGATE::P(C),XQ(a)
- R(d);N_GUARD::QAR1(A),XP(e)
- R(d);S_CUTQ(a)::S(F)
- P(g);S_CUTQ(a)::S(F)
- Tries
- Try
- Q(A);
- Vars
- Q(a);N_GUARD::S(F)
- R(d);N_GUARD::QAR1(A),XP(e)
- R(d);S_CUTQ(a)::S(F)
- P(g);S_CUTQ(a)::S(F)
- Refutation
- P(b);XQ(A)
- Try
- Q(A);CHECK
- Vars
- Q(a);XQ(A)::S(F)
- Refutation
- P(e);XQ(A)
- Try
- Q(A);
- Vars
- Q(a);CHECK,OGATE::P(C),XQ(a)
- Q(a);N_GUARD::S(F)
- Q(a);N_GUARD::S(F),XP(b)
- R(d);N_GUARD::QAR1(A),XP(e)
- R(d);S_CUTQ(a)::S(F)
- P(g);S_CUTQ(a)::S(F)
- Refutation
- R(d);
- Try
- Q(A);
- Vars
- Q(a);N_GUARD::S(F)
- R(d);N_GUARD::QAR1(A),XP(e)
- R(d);S_CUTQ(a)::S(F)
- P(g);S_CUTQ(a)::S(F)
- Refutation
- P(e);
- Try
- Actual
- Q(A);
- Vars
- Q(a);CHECK,OGATE::P(C),XQ(a)
- Q(a);N_GUARD::S(F)
- Q(a);N_GUARD::S(F),XP(b)
- R(d);OGATE::QAR2(A)
- R(d);S_CUTQ(a)::S(F)
- P(e);OGATEB::QAR2(A),XR(d)
- P(g);S_CUTQ(a)::S(F)
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).