MESON Chess Problem Database
Problem Display
PID: 64918 (4Q3/K5p1/P4pB1/1p2b1PR/1PbB1k2/4N1p1/4PpP1/2NR4 w - - 0 1)
Lewis, Robert Tony
The Problemist, 2006
#2
13 + 8
SOLUTION
- SOUND
- Sets
- 1...Ba2
- 2.Sd3#
- 1...Bxe2
- 2.Sxe2#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Bd5
- 2.Sd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bxd4+
- 2.Rxd4#
- 1...Bd6
- 2.Qe4#
- 1...Bc7
- 2.Qe4#
- 1...Bb8+
- 2.Qxb8#
- 1...f1Q
- 2.Rxf1#
- 1...f1S
- 2.Rxf1#
- 1...f1B
- 2.Rxf1#
- 1...f1R
- 2.Rxf1#
- 1...fxg5
- 2.Qxe5#
- 1...f5
- 2.Qxe5#
- 1...Ba2
- Tries
- 1.Kb6?
- 1...Bxd4+
- 2.Rxd4#
- 1...Bxe2
- 2.Sxe2#
- 1...fxg5
- 2.Qxe5#
- 1...f5
- 2.Qxe5#
- 1...f1Q
- 2.Rxf1#
- 1...f1S
- 2.Rxf1#
- 1...f1B
- 2.Rxf1#
- 1...f1R
- 2.Rxf1#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Bd5
- 2.Sd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bd6
- 2.Qe4#
- 1...Bb8
- 2.Qe4#
- 2.Qxb8#
- 1...Bc7+!
- 1...Bxd4+
- 1.Kb7?
- 1...Bxe2
- 2.Sxe2#
- 1...Bxd4
- 2.Rxd4#
- 2.Qe4#
- 1...fxg5
- 2.Qxe5#
- 1...f5
- 2.Qxe5#
- 1...f1Q
- 2.Rxf1#
- 1...f1S
- 2.Rxf1#
- 1...f1B
- 2.Rxf1#
- 1...f1R
- 2.Rxf1#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bd6
- 2.Qe4#
- 1...Bc7
- 2.Qe4#
- 1...Bb8
- 2.Qe4#
- 2.Qxb8#
- 1...Bd5+!
- 1...Bxe2
- 1.Ka8?
- 1...Bxe2
- 2.Sxe2#
- 1...Bxd4
- 2.Rxd4#
- 2.Qe4#
- 1...fxg5
- 2.Qxe5#
- 1...f5
- 2.Qxe5#
- 1...f1Q
- 2.Rxf1#
- 1...f1S
- 2.Rxf1#
- 1...f1B
- 2.Rxf1#
- 1...f1R
- 2.Rxf1#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bd6
- 2.Qe4#
- 1...Bc7
- 2.Qe4#
- 1...Bb8
- 2.Qe4#
- 2.Qxb8#
- 1...Bd5+!
- 1...Bxe2
- 1.Bf5?
- 1...Bxd4+
- 2.Rxd4#
- 1...Bb8+
- 2.Qxb8#
- 1...Bxe2
- 2.Sxe2#
- 1...fxg5
- 2.Qxe5#
- 1...f1Q
- 2.Rxf1#
- 1...f1S
- 2.Rxf1#
- 1...f1B
- 2.Rxf1#
- 1...f1R
- 2.Rxf1#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Bd5
- 2.Sd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bd6
- 2.Qe4#
- 1...Bc7
- 2.Qe4#
- 1...g6!
- 1...Bxd4+
- 1.Bh7?
- 1...Bxd4+
- 2.Rxd4#
- 1...Bb8+
- 2.Qxb8#
- 1...Bxe2
- 2.Sxe2#
- 1...fxg5
- 2.Qxe5#
- 1...f5
- 2.Qxe5#
- 1...f1Q
- 2.Rxf1#
- 1...f1S
- 2.Rxf1#
- 1...f1B
- 2.Rxf1#
- 1...f1R
- 2.Rxf1#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Bd5
- 2.Sd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bd6
- 2.Qe4#
- 1...Bc7
- 2.Qe4#
- 1...g6!
- 1...Bxd4+
- 1.Rf1?
- 1...Bb8+
- 2.Qxb8#
- 1...Bxe2
- 2.Sxe2#
- 1...fxg5
- 2.Qxe5#
- 1...f5
- 2.Qxe5#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Bd5
- 2.Sd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bd6
- 2.Qe4#
- 1...Bc7
- 2.Qe4#
- 1...Bxd4+!
- 1...Bb8+
- 1.Rdh1?
- threat
- 2.R1h4#
- 1...Bb8+
- 2.Qxb8#
- 1...Bxe2
- 2.Sxe2#
- 1...fxg5
- 2.Qxe5#
- 1...Be6
- 2.Sd3#
- 1...Bxd4+!
- threat
- 1.Qd7?
- threat
- 2.Qg4#
- 2.Qf5#
- 1...Bxd4+
- 2.Qxd4#
- 1...Bxe2
- 2.Sxe2#
- 2.Sd5#
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 1...Bd3
- 2.Sxd3#
- 2.Sd5#
- 2.Qg4#
- 1...Be6
- 2.Sd3#
- 1...Bb8+!
- threat
- 1.Qe6?
- threat
- 2.Qg4#
- 2.Qf5#
- 1...Bxd4+
- 2.Rxd4#
- 1...Bxe2
- 2.Sxe2#
- 2.Sd5#
- 2.Qf5#
- 1...Bxe6
- 2.Sd3#
- 1...f5
- 2.Qxf5#
- 2.Qxe5#
- 1...Bd3
- 2.Sxd3#
- 2.Sd5#
- 2.Qg4#
- 1...Bb8+!
- threat
- 1.Qe7?
- 1...Bxd4+
- 2.Rxd4#
- 1...Bxe2
- 2.Sxe2#
- 1...fxg5
- 2.Qxg5#
- 2.Qxe5#
- 1...f5
- 2.Rh4#
- 2.Qxe5#
- 1...f1Q
- 2.Rxf1#
- 1...f1S
- 2.Rxf1#
- 1...f1B
- 2.Rxf1#
- 1...f1R
- 2.Rxf1#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Bd5
- 2.Sd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bd6
- 2.Qxd6#
- 2.Qe4#
- 1...Bc7
- 2.Qe4#
- 2.Qxc7#
- 1...Bb8+!
- 1...Bxd4+
- 1.Qa8?
- threat
- 2.Qf3#
- 2.Qe4#
- 1...Bb8+
- 2.Qxb8#
- 1...Bxe2
- 2.Sxe2#
- 2.Qe4#
- 1...f1Q
- 2.Rxf1#
- 2.Qe4#
- 1...f1R
- 2.Rxf1#
- 2.Qe4#
- 1...Bd3
- 2.Sxd3#
- 2.Qf3#
- 1...Bd5
- 2.Sd3#
- 1...f5
- 2.Qf3#
- 1...Bxd4+!
- threat
- 1.Qb8?
- 1...Bxe2
- 2.Sxe2#
- 1...fxg5
- 2.Qxe5#
- 1...f5
- 2.Qxe5#
- 1...f1Q
- 2.Rxf1#
- 1...f1S
- 2.Rxf1#
- 1...f1B
- 2.Rxf1#
- 1...f1R
- 2.Rxf1#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Bd5
- 2.Sd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bd6
- 2.Qxd6#
- 1...Bc7
- 2.Qxc7#
- 1...Bxb8+!
- 1...Bxe2
- 1.Qc8?
- threat
- 2.Qg4#
- 2.Qf5#
- 1...Bb8+
- 2.Qxb8#
- 1...Bxe2
- 2.Sxe2#
- 2.Sd5#
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 1...Bd3
- 2.Sxd3#
- 2.Sd5#
- 2.Qg4#
- 1...Be6
- 2.Sd3#
- 1...Bxd4+!
- threat
- 1.gxf6?
- threat
- 2.Qxe5#
- 1...Bxd4+
- 2.Rxd4#
- 1...Bb8+
- 2.Qxb8#
- 1...Bxf6
- 2.Rf5#
- 2.Qe4#
- 1...Be6
- 2.Sd3#
- 1...Bd6
- 2.Rf5#
- 2.Qe4#
- 1...Bc7
- 2.Rf5#
- 2.Qe4#
- 1...gxf6!
- threat
- 1.Kb6?
- Keys
- 1.Qd8!
- 1...Bxd4+
- 2.Qxd4#
- 1...Bb8+
- 2.Qxb8#
- 1...Bxe2
- 2.Sxe2#
- 1...fxg5
- 2.Qxg5#
- 1...f5
- 2.Rh4#
- 1...f1Q
- 2.Rxf1#
- 1...f1S
- 2.Rxf1#
- 1...f1B
- 2.Rxf1#
- 1...f1R
- 2.Rxf1#
- 1...Ba2
- 2.Sd3#
- 1...Bb3
- 2.Sd3#
- 1...Bd3
- 2.Sxd3#
- 1...Bd5
- 2.Sd3#
- 1...Be6
- 2.Sd3#
- 1...Bf7
- 2.Sd3#
- 1...Bg8
- 2.Sd3#
- 1...Bd6
- 2.Qxd6#
- 1...Bc7
- 2.Qxc7#
- 1...Bxd4+
- 1.Qd8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(c);N_GUARD::S(A)
- B(c);XP(C)::S(A),XB(c)
- B(c);N_GUARD::S(A),XB(c)
- B(f);CHECK,OGATE,XB(G)::R(B),XB(f)
- B(f);OGATE::QAR1(M)
- B(f);CHECK,OGATEB::QAB(M),XB(f)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- P(g);N_GUARD,XP(H)::QAB1(M),XB(f)
- P(g);N_GUARD::QAB1(M),XB(f)
- Tries
- Try
- K(L);S_FLIGHT
- Vars
- B(f);CHECK,OGATE,XB(G)::R(B),XB(f)
- B(c);XP(C)::S(A),XB(c)
- P(g);N_GUARD,XP(H)::QAB1(M),XB(f)
- P(g);N_GUARD::QAB1(M),XB(f)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- B(c);N_GUARD::S(A)
- B(c);N_GUARD::S(A),XB(c)
- B(f);OGATE::QAR1(M)
- Refutation
- B(f);CHECK
- Try
- K(L);P-FLIGHT
- Vars
- B(c);XP(C)::S(A),XB(c)
- P(g);N_GUARD,XP(H)::QAB1(M),XB(f)
- P(g);N_GUARD::QAB1(M),XB(f)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- B(c);N_GUARD::S(A)
- B(c);N_GUARD::S(A),XB(c)
- B(f);OGATE::QAR1(M)
- Refutation
- B(c);CHECK
- Try
- K(L);P-FLIGHT
- Vars
- B(c);XP(C)::S(A),XB(c)
- P(g);N_GUARD,XP(H)::QAB1(M),XB(f)
- P(g);N_GUARD::QAB1(M),XB(f)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- B(c);N_GUARD::S(A)
- B(c);N_GUARD::S(A),XB(c)
- B(f);OGATE::QAR1(M)
- Refutation
- B(c);CHECK
- Try
- B(K);
- Vars
- B(f);CHECK,OGATE,XB(G)::R(B),XB(f)
- B(f);CHECK,OGATEB::QAB(M),XB(f)
- B(c);XP(C)::S(A),XB(c)
- P(g);N_GUARD,XP(H)::QAB1(M),XB(f)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- B(c);N_GUARD::S(A)
- B(c);N_GUARD::S(A),XB(c)
- B(f);OGATE::QAR1(M)
- Refutation
- P(h);
- Try
- B(K);
- Vars
- B(f);CHECK,OGATE,XB(G)::R(B),XB(f)
- B(f);CHECK,OGATEB::QAB(M),XB(f)
- B(c);XP(C)::S(A),XB(c)
- P(g);N_GUARD,XP(H)::QAB1(M),XB(f)
- P(g);N_GUARD::QAB1(M),XB(f)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- B(c);N_GUARD::S(A)
- B(c);N_GUARD::S(A),XB(c)
- B(f);OGATE::QAR1(M)
- Refutation
- P(h);
- Try
- R(B);P_PINP(a)
- Vars
- B(f);CHECK,OGATEB::QAB(M),XB(f)
- B(c);XP(C)::S(A),XB(c)
- P(g);N_GUARD,XP(H)::QAB1(M),XB(f)
- P(g);N_GUARD::QAB1(M),XB(f)
- B(c);N_GUARD::S(A)
- B(c);N_GUARD::S(A),XB(c)
- B(f);OGATE::QAR1(M)
- Refutation
- B(f);CHECK,XB(G)
- Try
- R(B);
- Threat
- R(B)
- Vars
- B(f);CHECK,OGATEB::QAB(M),XB(f)
- B(c);XP(C)::S(A),XB(c)
- P(g);N_GUARD,XP(H)::QAB1(M),XB(f)
- B(c);N_GUARD::S(A)
- Refutation
- B(f);CHECK,XB(G)
- Try
- Q(M);
- Threat
- DUALS(2)
- Vars
- B(f);CHECK,OGATE,XB(G)::QAR2(M),XB(f)
- P(g);::QAR1(M),XP(g)
- B(c);N_GUARD::S(A)
- Refutation
- B(f);CHECK
- Try
- Q(M);
- Threat
- DUALS(2)
- Vars
- B(f);CHECK,OGATE,XB(G)::R(B),XB(f)
- B(c);N_GUARD,XQ(M)::S(A)
- Refutation
- B(f);CHECK
- Try
- Q(M);
- Vars
- B(f);CHECK,OGATE,XB(G)::R(B),XB(f)
- B(c);XP(C)::S(A),XB(c)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- B(c);N_GUARD::S(A)
- B(c);N_GUARD::S(A),XB(c)
- Refutation
- B(f);CHECK
- Try
- Q(M);
- Threat
- DUALS(2)
- Vars
- B(f);CHECK,OGATEB::QAB(M),XB(f)
- B(c);N_GUARD::S(A)
- P(g);::QAR1(M)
- Refutation
- B(f);CHECK,XB(G)
- Try
- Q(M);P_PINB(f)
- Vars
- B(c);XP(C)::S(A),XB(c)
- P(g);N_GUARD,XP(H)::QAB1(M),XB(f)
- P(g);N_GUARD::QAB1(M),XB(f)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- B(c);N_GUARD::S(A)
- B(c);N_GUARD::S(A),XB(c)
- B(f);OGATEB::QAB(M),XB(f)
- Refutation
- B(f);CHECK,N_SPINB(f),XQ(M)
- Try
- Q(M);
- Threat
- DUALS(2)
- Vars
- B(f);CHECK,OGATEB::QAB(M),XB(f)
- P(g);::QAR1(M),XP(g)
- B(c);N_GUARD::S(A)
- Refutation
- B(f);CHECK,XB(G)
- Try
- P(H);XP(g)
- Threat
- QAB1(M),XB(f)
- Vars
- B(f);CHECK,OGATE,XB(G)::R(B),XB(f)
- B(f);CHECK,OGATEB::QAB(M),XB(f)
- B(c);N_GUARD::S(A)
- Refutation
- P(h);XP(H)
- Try
- Actual
- Q(M);
- Vars
- B(f);CHECK,OGATE,XB(G)::QAR2(M),XB(f)
- B(f);CHECK,OGATEB::QAB(M),XB(f)
- B(c);XP(C)::S(A),XB(c)
- P(g);OGATE,XP(H)::QAB1(M),XP(g)
- P(g);::R(I)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- B(c);N_GUARD::S(A)
- B(c);N_GUARD::S(A),XB(c)
- B(f);OGATEB::QAB(M),XB(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).