MESON Chess Problem Database
Problem Display
PID: 51234 (8/5p2/5QpN/B1pPK1PP/4BP1r/4k3/1Rp2pR1/n5Nn w - - 0 1)
Sumner, Christopher Richard Benson
Manchester Guardian, 1955
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Rh2
- 2.Sg4#
- 1...Rh3
- 2.Sg4#
- 1...Rxf4
- 2.Qxf4#
- 1...Rg4
- 2.Sxg4#
- 1...Rxh5
- 2.Sg4#
- 1...Sb3
- 2.Rxb3#
- 1...Sg3
- 2.Rxg3#
- 1...c1Q
- 2.Re2#
- 1...c1S
- 2.Bd2#
- 1...c1B
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...fxg1Q
- 2.Bd2#
- 1...fxg1S
- 2.Bd2#
- 1...fxg1B
- 2.Bd2#
- 1...fxg1R
- 2.Bd2#
- 1...f1Q
- 2.Bd2#
- 1...f1S
- 2.Re2#
- 1...f1B
- 2.Bd2#
- 1...f1R
- 2.Bd2#
- 2.Re2#
- 1...c4
- 2.Qb6#
- 1...gxh5
- 2.Sf5#
- 1...Rh2
- Tries
- 1.Bc3?
- 1...Rxf4
- 2.Qxf4#
- 1...Rxh5
- 2.Sg4#
- 1...fxg1Q
- 2.Bd2#
- 1...fxg1S
- 2.Bd2#
- 1...fxg1B
- 2.Bd2#
- 1...fxg1R
- 2.Bd2#
- 1...gxh5
- 2.Sf5#
- 1...c1Q
- 2.Re2#
- 1...c1S
- 2.Bd2#
- 1...c1B
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...f1Q
- 2.Bd2#
- 1...f1S
- 2.Re2#
- 1...f1B
- 2.Bd2#
- 1...f1R
- 2.Bd2#
- 2.Re2#
- 1...Rh2
- 2.Sg4#
- 1...Rh3
- 2.Sg4#
- 1...Rg4
- 2.Sxg4#
- 1...Sg3
- 2.Rxg3#
- 1...c4
- 2.Qb6#
- 1...Sb3!
- 1...Rxf4
- 1.Bb4?
- 1...Rxf4
- 2.Qxf4#
- 1...Rxh5
- 2.Sg4#
- 1...fxg1Q
- 2.Bd2#
- 2.Bxc5#
- 1...fxg1S
- 2.Bd2#
- 2.Bxc5#
- 1...fxg1B
- 2.Bd2#
- 2.Bxc5#
- 1...fxg1R
- 2.Bd2#
- 2.Bxc5#
- 1...gxh5
- 2.Sf5#
- 1...c1Q
- 2.Re2#
- 1...c1S
- 2.Bd2#
- 2.Bxc5#
- 1...c1B
- 2.Bxc5#
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...f1Q
- 2.Bd2#
- 2.Bxc5#
- 1...f1S
- 2.Bxc5#
- 2.Re2#
- 1...f1B
- 2.Bd2#
- 2.Bxc5#
- 1...f1R
- 2.Bd2#
- 2.Bxc5#
- 2.Re2#
- 1...Rh2
- 2.Sg4#
- 1...Rh3
- 2.Sg4#
- 1...Rg4
- 2.Sxg4#
- 1...Sb3
- 2.Rxb3#
- 1...Sg3
- 2.Rxg3#
- 1...c4
- 2.Qb6#
- 1...cxb4!
- 1...Rxf4
- 1.Ra2?
- 1...Rxf4
- 2.Qxf4#
- 1...Rxh5
- 2.Sg4#
- 1...fxg1Q
- 2.Bd2#
- 1...fxg1S
- 2.Bd2#
- 1...fxg1B
- 2.Bd2#
- 1...fxg1R
- 2.Bd2#
- 1...gxh5
- 2.Sf5#
- 1...c1Q
- 2.Re2#
- 1...c1S
- 2.Bd2#
- 1...c1B
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...f1Q
- 2.Bd2#
- 1...f1S
- 2.Re2#
- 1...f1B
- 2.Bd2#
- 1...f1R
- 2.Bd2#
- 2.Re2#
- 1...Rh2
- 2.Sg4#
- 1...Rh3
- 2.Sg4#
- 1...Rg4
- 2.Sxg4#
- 1...Sg3
- 2.Rxg3#
- 1...c4
- 2.Qb6#
- 1...Sb3!
- 1...Rxf4
- 1.Rxc2?
- threat
- 2.Bd2#
- 2.Re2#
- 1...fxg1S
- 2.Bd2#
- 2.Rc3#
- 1...f1Q
- 2.Bd2#
- 1...f1S
- 2.Rce2#
- 2.Rc3#
- 2.Rge2#
- 1...f1B
- 2.Bd2#
- 1...Sb3
- 2.Re2#
- 1...Sg3
- 2.Bd2#
- 2.Rxg3#
- 1...Sxc2!
- threat
- 1.Rh2?
- 1...Rxh2
- 2.Sg4#
- 1...Rxf4
- 2.Qxf4#
- 1...Rxh5
- 2.Sg4#
- 1...fxg1Q
- 2.Bd2#
- 1...fxg1S
- 2.Bd2#
- 1...fxg1B
- 2.Bd2#
- 1...fxg1R
- 2.Bd2#
- 1...gxh5
- 2.Sf5#
- 1...c1Q
- 2.Re2#
- 1...c1S
- 2.Bd2#
- 1...c1B
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...f1Q
- 2.Bd2#
- 1...f1S
- 2.Re2#
- 1...f1B
- 2.Bd2#
- 1...f1R
- 2.Bd2#
- 2.Re2#
- 1...Rh3
- 2.Sg4#
- 1...Rg4
- 2.Sxg4#
- 1...Sb3
- 2.Rxb3#
- 1...c4
- 2.Qb6#
- 1...Sg3!
- 1...Rxh2
- 1.Qe7?
- threat
- 2.Qxc5#
- 1...c1Q
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...Sb3
- 2.Rxb3#
- 1...c4
- 2.Qc5#
- 2.Qa7#
- 1...f6+!
- threat
- 1.Qa6?
- threat
- 2.Qe2#
- 2.Qd3#
- 1...fxg1S
- 2.Bd2#
- 2.Qd3#
- 1...c1S
- 2.Bd2#
- 1...f1Q
- 2.Bd2#
- 1...f1B
- 2.Bd2#
- 1...Sg3
- 2.Rxg3#
- 2.Qd3#
- 1...c4
- 2.Qb6#
- 2.Qa7#
- 1...f6+!
- threat
- 1.Qb6?
- threat
- 2.Qxc5#
- 1...c1Q
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...Sb3
- 2.Rxb3#
- 2.Qxb3#
- 1...f6+!
- threat
- 1.Qc6?
- threat
- 2.Qxc5#
- 1...c1Q
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...Sb3
- 2.Rxb3#
- 1...c4
- 2.Qc5#
- 2.Qb6#
- 1...f6+!
- threat
- 1.Qd6?
- threat
- 2.Qxc5#
- 1...c1Q
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...Sb3
- 2.Rxb3#
- 1...c4
- 2.Qc5#
- 2.Qb6#
- 1...f6+!
- threat
- 1.d6?
- 1...Rxf4
- 2.Qxf4#
- 1...Rxh5
- 2.Sg4#
- 1...fxg1Q
- 2.Bd2#
- 1...fxg1S
- 2.Bd2#
- 1...fxg1B
- 2.Bd2#
- 1...fxg1R
- 2.Bd2#
- 1...gxh5
- 2.Sf5#
- 1...c1Q
- 2.Re2#
- 1...c1S
- 2.Bd2#
- 1...c1B
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...f1Q
- 2.Bd2#
- 1...f1S
- 2.Re2#
- 1...f1B
- 2.Bd2#
- 1...f1R
- 2.Bd2#
- 2.Re2#
- 1...Rh2
- 2.Sg4#
- 1...Rh3
- 2.Sg4#
- 1...Rg4
- 2.Sxg4#
- 1...Sb3
- 2.Rxb3#
- 1...Sg3
- 2.Rxg3#
- 1...c4!
- 1...Rxf4
- 1.Bc3?
- Keys
- 1.Qxf7!
- 1...Rxf4
- 2.Qxf4#
- 1...Rxh5
- 2.Sg4#
- 1...fxg1Q
- 2.Bd2#
- 1...fxg1S
- 2.Bd2#
- 1...fxg1B
- 2.Bd2#
- 1...fxg1R
- 2.Bd2#
- 1...gxh5
- 2.Sf5#
- 1...c1Q
- 2.Re2#
- 1...c1S
- 2.Bd2#
- 1...c1B
- 2.Re2#
- 1...c1R
- 2.Bd2#
- 2.Re2#
- 1...f1Q
- 2.Bd2#
- 1...f1S
- 2.Re2#
- 1...f1B
- 2.Bd2#
- 1...f1R
- 2.Bd2#
- 2.Re2#
- 1...Rh2
- 2.Sg4#
- 1...Rh3
- 2.Sg4#
- 1...Rg4
- 2.Sxg4#
- 1...Sb3
- 2.Rxb3#
- 1...Sg3
- 2.Rxg3#
- 1...c4
- 2.Qa7#
- 1...Rxf4
- 1.Qxf7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(f);N_GUARD::S(L)
- R(f);OGATE,XP(E)::QAB1(K),XR(f)
- R(f);N_GUARD::S(L),XR(f)
- R(f);N_GUARD,P_PINP(I),XP(J)::S(L)
- S(a);N_GUARD::R(B),XS(a)
- S(b);N_GUARD::R(C),XS(b)
- P(c);OGATE::R1(B)
- P(c);::B(F)
- P(d);XS(A)::B(F)
- P(d);::B(F)
- P(d);OGATE::R1(C)
- P(g);OGATEB::QAB(K)
- P(h);N_GUARD,XP(J)::S(L)
- Tries
- Try
- B(F);
- Vars
- R(f);OGATE,XP(E)::QAB1(K),XR(f)
- R(f);N_GUARD,P_PINP(I),XP(J)::S(L)
- P(d);XS(A)::B(F)
- P(h);N_GUARD,XP(J)::S(L)
- P(c);OGATE::R1(B)
- P(c);::B(F)
- P(d);::B(F)
- P(d);OGATE::R1(C)
- R(f);N_GUARD::S(L)
- R(f);N_GUARD::S(L),XR(f)
- S(b);N_GUARD::R(C),XS(b)
- P(g);OGATEB::QAB(K)
- Refutation
- S(a);
- Try
- B(F);
- Vars
- R(f);OGATE,XP(E)::QAB1(K),XR(f)
- R(f);N_GUARD,P_PINP(I),XP(J)::S(L)
- P(h);N_GUARD,XP(J)::S(L)
- P(c);OGATE::R1(B)
- R(f);N_GUARD::S(L)
- R(f);N_GUARD::S(L),XR(f)
- S(a);N_GUARD::R(B),XS(a)
- S(b);N_GUARD::R(C),XS(b)
- P(g);OGATEB::QAB(K)
- Refutation
- P(g);XB(F)
- Try
- R(B);
- Vars
- R(f);OGATE,XP(E)::QAB1(K),XR(f)
- R(f);N_GUARD,P_PINP(I),XP(J)::S(L)
- P(d);XS(A)::B(F)
- P(h);N_GUARD,XP(J)::S(L)
- P(c);OGATE::R1(B)
- P(c);::B(F)
- P(d);::B(F)
- P(d);OGATE::R1(C)
- R(f);N_GUARD::S(L)
- R(f);N_GUARD::S(L),XR(f)
- S(b);N_GUARD::R(C),XS(b)
- P(g);OGATEB::QAB(K)
- Refutation
- S(a);
- Try
- R(B);XP(c)
- Threat
- DUALS(2)
- Vars
- P(d);::B(F)
- S(a);::R1(B)
- Refutation
- S(a);XR(B)
- Try
- R(C);
- Vars
- R(f);N_GUARD,XR(C)::S(L)
- R(f);OGATE,XP(E)::QAB1(K),XR(f)
- R(f);N_GUARD,P_PINP(I),XP(J)::S(L)
- P(d);XS(A)::B(F)
- P(h);N_GUARD,XP(J)::S(L)
- P(c);OGATE::R1(B)
- P(c);::B(F)
- P(d);::B(F)
- P(d);OGATE::R1(C)
- R(f);N_GUARD::S(L)
- R(f);N_GUARD::S(L),XR(f)
- S(a);N_GUARD::R(B),XS(a)
- P(g);OGATEB::QAB(K)
- Refutation
- S(b);
- Try
- Q(K);
- Threat
- QAB(K),XP(g)
- Vars
- P(c);OGATE::R1(B)
- S(a);N_GUARD::R(B),XS(a)
- Refutation
- P(i);CHECK
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- P(c);::B(F)
- P(d);::B(F)
- Refutation
- P(i);CHECK
- Try
- Q(K);P_PINP(g)
- Threat
- QAB(K),XP(g)
- Vars
- P(c);OGATE::R1(B)
- Refutation
- P(i);CHECK
- Try
- Q(K);
- Threat
- QAB(K),XP(g)
- Vars
- P(c);OGATE::R1(B)
- S(a);N_GUARD::R(B),XS(a)
- Refutation
- P(i);CHECK
- Try
- Q(K);
- Threat
- QAB(K),XP(g)
- Vars
- P(c);OGATE::R1(B)
- S(a);N_GUARD::R(B),XS(a)
- Refutation
- P(i);CHECK
- Try
- P(G);
- Vars
- R(f);OGATE,XP(E)::QAB1(K),XR(f)
- R(f);N_GUARD,P_PINP(I),XP(J)::S(L)
- P(d);XS(A)::B(F)
- P(h);N_GUARD,XP(J)::S(L)
- P(c);OGATE::R1(B)
- P(c);::B(F)
- P(d);::B(F)
- P(d);OGATE::R1(C)
- R(f);N_GUARD::S(L)
- R(f);N_GUARD::S(L),XR(f)
- S(a);N_GUARD::R(B),XS(a)
- S(b);N_GUARD::R(C),XS(b)
- Refutation
- P(g);
- Try
- Actual
- Q(K);XP(i)
- Vars
- R(f);OGATE,XP(E)::QAB1(K),XR(f)
- R(f);N_GUARD,P_PINP(I),XP(J)::S(L)
- P(d);XS(A)::B(F)
- P(h);N_GUARD,XP(J)::S(L)
- P(c);OGATE::R1(B)
- P(c);::B(F)
- P(d);::B(F)
- P(d);OGATE::R1(C)
- R(f);N_GUARD::S(L)
- R(f);N_GUARD::S(L),XR(f)
- S(a);N_GUARD::R(B),XS(a)
- S(b);N_GUARD::R(C),XS(b)
- P(g);OGATEB::QAB(K)
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).