MESON Chess Problem Database
Problem Display
PID: 134020 (3b4/8/2QpkpNN/1nP1q1P1/8/3K4/8/4RR2 w - - 0 1)
Lewis, Robert Tony
The Field, 1964
(First published on Thu May 28 1964)
#2
8 + 6
SOLUTION
- SOUND
- Sets
- 1...Qxe1
- 2.Rxe1#
- 1...Qe2+
- 2.Rxe2#
- 1...Qe3+
- 2.Rxe3#
- 1...Qe4+
- 2.Rxe4#
- 1...Ba5
- 2.Rxf6#
- 1...Bb6
- 2.Rxf6#
- 1...Bc7
- 2.Rxf6#
- 1...Be7
- 2.Sf4#
- 1...Sa3
- 2.Qxd6#
- 1...Sc3
- 2.Qxd6#
- 1...Sd4
- 2.Qxd6#
- 1...Sa7
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...fxg5
- 2.Rxe5#
- 1...f5
- 2.Rxe5#
- 1...Qxe1
- Tries
- 1.Kd2?
- 1...Qxe1+
- 2.Rxe1#
- 1...Qe2+
- 2.Rxe2#
- 1...Qe3+
- 2.Rxe3#
- 1...fxg5
- 2.Rxe5#
- 1...Qe4
- 2.Rxe4#
- 1...Bb6
- 2.Rxf6#
- 1...Bc7
- 2.Rxf6#
- 1...Be7
- 2.Sf4#
- 1...Sa3
- 2.Qxd6#
- 1...Sc3
- 2.Qxd6#
- 1...Sd4
- 2.Qxd6#
- 1...Sa7
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...f5
- 2.Rxe5#
- 1...Ba5+!
- 1...Qxe1+
- 1.Kc4?
- threat
- 2.Qc8#
- 1...Qe2+
- 2.Rxe2#
- 1...Qe4+
- 2.Rxe4#
- 1...Bc7
- 2.Rxf6#
- 2.Qe8#
- 1...Sa7
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...Sa3+!
- threat
- 1.Re2?
- 1...Qe3+
- 2.Rxe3#
- 1...Qe4+
- 2.Rxe4#
- 1...fxg5
- 2.Rxe5#
- 1...Ba5
- 2.Rxf6#
- 1...Bb6
- 2.Rxf6#
- 1...Bc7
- 2.Rxf6#
- 1...Be7
- 2.Sf4#
- 1...Sa3
- 2.Qxd6#
- 1...Sc3
- 2.Qxd6#
- 1...Sd4
- 2.Qxd6#
- 1...Sa7
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...f5
- 2.Rxe5#
- 1...Qxe2+!
- 1...Qe3+
- 1.Re3?
- 1...Qe4+
- 2.Rxe4#
- 1...fxg5
- 2.Rxe5#
- 1...Ba5
- 2.Rxf6#
- 1...Bb6
- 2.Rxf6#
- 1...Bc7
- 2.Rxf6#
- 1...Be7
- 2.Sf4#
- 1...Sa3
- 2.Qxd6#
- 1...Sc3
- 2.Qxd6#
- 1...Sd4
- 2.Qxd6#
- 1...Sa7
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...f5
- 2.Rxe5#
- 1...Qxe3+!
- 1...Qe4+
- 1.Re4?
- 1...fxg5
- 2.Rxe5#
- 1...Ba5
- 2.Rxf6#
- 1...Bb6
- 2.Rxf6#
- 1...Bc7
- 2.Rxf6#
- 1...Be7
- 2.Sf4#
- 1...Sa3
- 2.Qxd6#
- 1...Sc3
- 2.Qxd6#
- 1...Sd4
- 2.Qxd6#
- 1...Sa7
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...f5
- 2.Rxe5#
- 1...Qxe4+!
- 1...fxg5
- 1.Rf2?
- 1...Qe2+
- 2.Rexe2#
- 2.Rfxe2#
- 1...Qe3+
- 2.Rxe3#
- 1...Qe4+
- 2.Rxe4#
- 1...fxg5
- 2.Rxe5#
- 1...Ba5
- 2.Rxf6#
- 1...Bb6
- 2.Rxf6#
- 1...Bc7
- 2.Rxf6#
- 1...Be7
- 2.Sf4#
- 1...Sa3
- 2.Qxd6#
- 1...Sc3
- 2.Qxd6#
- 1...Sd4
- 2.Qxd6#
- 1...Sa7
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...f5
- 2.Rxe5#
- 1...Qxe1!
- 1...Qe2+
- 1.Rf3?
- 1...Qe2+
- 2.Rxe2#
- 1...Qe3+
- 2.Rexe3#
- 2.Rfxe3#
- 1...Qe4+
- 2.Rxe4#
- 1...fxg5
- 2.Rxe5#
- 1...Ba5
- 2.Rxf6#
- 1...Bb6
- 2.Rxf6#
- 1...Bc7
- 2.Rxf6#
- 1...Be7
- 2.Sf4#
- 1...Sa3
- 2.Qxd6#
- 1...Sc3
- 2.Qxd6#
- 1...Sd4
- 2.Qxd6#
- 1...Sa7
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...f5
- 2.Rxe5#
- 1...Qxe1!
- 1...Qe2+
- 1.Qe8+?
- 1...Be7
- 2.Sf4#
- 1...Kd5!
- 1...Be7
- 1.cxd6?
- threat
- 2.Sf4#
- 2.Sf8#
- 1...Qe2+
- 2.Rxe2#
- 1...Qe3+
- 2.Rxe3#
- 1...Qe4+
- 2.Rxe4#
- 1...Qxe1
- 2.Rxe1#
- 1...fxg5
- 2.Sf8#
- 2.Rxe5#
- 1...Be7
- 2.Sf4#
- 1...Sxd6!
- threat
- 1.Kd2?
- Keys
- 1.Rf5!
- 1...Qe2+
- 2.Rxe2#
- 1...Qe3+
- 2.Rxe3#
- 1...Qe4+
- 2.Rxe4#
- 1...Qxe1
- 2.Qc8#
- 1...fxg5
- 2.Rexe5#
- 1...Ba5
- 2.Rxf6#
- 1...Bb6
- 2.Rxf6#
- 1...Bc7
- 2.Rxf6#
- 1...Be7
- 2.Sf4#
- 1...Sa3
- 2.Qxd6#
- 1...Sc3
- 2.Qxd6#
- 1...Sd4
- 2.Qxd6#
- 1...Sa7
- 2.Qxd6#
- 1...Sc7
- 2.Qxd6#
- 1...Qe2+
- 1.Rf5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- Q(b);N_SPINQ(b),OGATE,XR(A)::R(B),XQ(b)
- Q(b);CHECK,OGATEB::R(A),XQ(b)
- B(f);N_GUARD::R1(B),XP(e)
- B(f);SBLOCK::S(G)
- S(a);N_GUARD::QAR1(F),XP(c)
- P(e);N_GUARD,XP(E)::R1(A),XQ(b)
- P(e);N_GUARD::R1(A),XQ(b)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- Q(b);CHECK,N_SPINQ(b),OGATE,XR(A)::R(B),XQ(b)
- Q(b);CHECK,OGATEB::R(A),XQ(b)
- P(e);N_GUARD,XP(E)::R1(A),XQ(b)
- Q(b);OGATEB::R(A),XQ(b)
- B(f);N_GUARD::R1(B),XP(e)
- B(f);SBLOCK::S(G)
- S(a);N_GUARD::QAR1(F),XP(c)
- P(e);N_GUARD::R1(A),XQ(b)
- Refutation
- B(f);CHECK
- Try
- K(C);S_FLIGHT
- Threat
- QAB(F)
- Vars
- Q(b);CHECK,OGATEB::R(A),XQ(b)
- S(a);N_GUARD::QAR1(F),XP(c)
- Refutation
- S(a);CHECK
- Try
- R(A);
- Vars
- Q(b);CHECK,OGATEB::R(A),XQ(b)
- P(e);N_GUARD,XP(E)::R1(A),XQ(b)
- B(f);N_GUARD::R1(B),XP(e)
- B(f);SBLOCK::S(G)
- S(a);N_GUARD::QAR1(F),XP(c)
- P(e);N_GUARD::R1(A),XQ(b)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XR(A)
- Try
- R(A);
- Vars
- Q(b);CHECK,OGATEB::R(A),XQ(b)
- P(e);N_GUARD,XP(E)::R1(A),XQ(b)
- B(f);N_GUARD::R1(B),XP(e)
- B(f);SBLOCK::S(G)
- S(a);N_GUARD::QAR1(F),XP(c)
- P(e);N_GUARD::R1(A),XQ(b)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XR(A)
- Try
- R(A);
- Vars
- P(e);N_GUARD,XP(E)::R1(A),XQ(b)
- B(f);N_GUARD::R1(B),XP(e)
- B(f);SBLOCK::S(G)
- S(a);N_GUARD::QAR1(F),XP(c)
- P(e);N_GUARD::R1(A),XQ(b)
- Refutation
- Q(b);CHECK,N_SPINQ(b),XR(A)
- Try
- R(B);
- Vars
- Q(b);CHECK,OGATEB::R(A),XQ(b)
- P(e);N_GUARD,XP(E)::R1(A),XQ(b)
- B(f);N_GUARD::R1(B),XP(e)
- B(f);SBLOCK::S(G)
- S(a);N_GUARD::QAR1(F),XP(c)
- P(e);N_GUARD::R1(A),XQ(b)
- Refutation
- Q(b);N_SPINQ(b),XR(A)
- Try
- R(B);
- Vars
- Q(b);CHECK,OGATEB::R(A),XQ(b)
- P(e);N_GUARD,XP(E)::R1(A),XQ(b)
- B(f);N_GUARD::R1(B),XP(e)
- B(f);SBLOCK::S(G)
- S(a);N_GUARD::QAR1(F),XP(c)
- P(e);N_GUARD::R1(A),XQ(b)
- Refutation
- Q(b);N_SPINQ(b),XR(A)
- Try
- Q(F);CHECK,N_PINP(c)
- Vars
- B(f);P_SPINB(f)::S(G)
- Refutation
- K(d);N_SPINQ(b),S_FLIGHT
- Try
- P(D);XP(c)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,OGATEB::R(A),XQ(b)
- Q(b);N_SPINQ(b),OGATE,XR(A)::R(B),XQ(b)
- B(f);::S(G)
- Refutation
- S(a);P_SPINS(a),XP(D)
- Try
- Actual
- R(B);
- Vars
- Q(b);CHECK,OGATEB::R(A),XQ(b)
- Q(b);N_SPINQ(b),XR(A)::QAB(F)
- P(e);N_GUARD,XP(E)::R1(A),XQ(b)
- B(f);N_GUARD::R1(B),XP(e)
- B(f);SBLOCK::S(G)
- S(a);N_GUARD::QAR1(F),XP(c)
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).