MESON Chess Problem Database
Problem Display
PID: 189408 (2KN2q1/8/1p6/1P5n/1RPk2pQ/3N1P1n/3PP3/7B w - - 0 1)
Lytton, Cedric C (was Sells, CCL)
Problem Observer, 2019
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Qe6+
- 2.Sxe6#
- 1...Qf7
- 2.Sc6#
- 1...Qh7
- 2.Sc6#
- 2.Se6#
- 1...Qg5
- 2.Sc6#
- 2.Se6#
- 1...Qg7
- 2.Sc6#
- 2.Se6#
- 1...Qxd8+
- 2.Qxd8#
- 1...Sg1
- 2.Qf2#
- 1...Sf2
- 2.Qxf2#
- 1...S3f4
- 2.Qf2#
- 1...Sg5
- 2.Qf2#
- 1...Sg3
- 2.Qf6#
- 1...S5f4
- 2.Qf6#
- 1...Sf6
- 2.Qxf6#
- 1...Sg7
- 2.Qf6#
- 1...Qe6+
- Tries
- 1.Qg5?
- threat
- 2.Qe3#
- 2.Qe5#
- 1...Qxc4+
- 2.Sc6#
- 1...Qe6+
- 2.Sxe6#
- 1...Qxd8+
- 2.Qxd8#
- 1...Qxg5
- 2.Sc6#
- 2.Se6#
- 1...Qd5
- 2.Qe3#
- 2.Qxd5#
- 2.cxd5#
- 1...Qg7
- 2.Sc6#
- 2.Se6#
- 2.Qe3#
- 2.Qd5#
- 2.c5#
- 1...Qe8
- 2.Qd5#
- 2.c5#
- 1...Qh8
- 2.Qe3#
- 2.Qd5#
- 2.c5#
- 1...S3f4
- 2.Qe5#
- 1...S5f4
- 2.Qf6#
- 2.Qe5#
- 1...Sxg5!
- threat
- 1.Qe7?
- threat
- 2.Qe3#
- 2.Qe4#
- 2.Qe5#
- 1...Qe6+
- 2.Sxe6#
- 1...Qxd8+
- 2.Qxd8#
- 1...gxf3
- 2.Qe3#
- 2.Qe5#
- 1...Qd5
- 2.Qe3#
- 1...Qh7
- 2.Sc6#
- 2.Se6#
- 2.Qd6#
- 2.Qe3#
- 2.Qe5#
- 1...Qg5
- 2.Sc6#
- 2.Se6#
- 2.Qe4#
- 1...Qg6
- 2.Qe3#
- 2.Qe5#
- 1...Qg7
- 2.Sc6#
- 2.Se6#
- 2.Qd6#
- 2.Qe3#
- 2.Qe4#
- 1...Qe8
- 2.Qd6#
- 1...Qh8
- 2.Qd6#
- 2.Qe3#
- 2.Qe4#
- 2.Qd7#
- 1...Sf2
- 2.Qe3#
- 2.Qe5#
- 1...Sg5
- 2.Qe3#
- 2.Qe5#
- 1...Sg3
- 2.Qf6#
- 2.Qe3#
- 2.Qe5#
- 1...Sf6
- 2.Qxf6#
- 2.Qe3#
- 2.Qe5#
- 1...Qxc4+!
- threat
- 1.f4?
- 1...Qxc4+
- 2.Sc6#
- 1...Qe6+
- 2.Sxe6#
- 1...Qxd8+
- 2.Qxd8#
- 1...S3xf4
- 2.Qf2#
- 1...S5xf4
- 2.Qf6#
- 1...Qd5
- 2.cxd5#
- 1...Qf7
- 2.Sc6#
- 1...Qh7
- 2.Sc6#
- 2.Se6#
- 2.c5#
- 1...Qg5
- 2.Sc6#
- 2.Se6#
- 2.c5#
- 1...Qg6
- 2.c5#
- 1...Qg7
- 2.Sc6#
- 2.Se6#
- 2.c5#
- 1...Qe8
- 2.c5#
- 1...Qf8
- 2.c5#
- 1...Qh8
- 2.c5#
- 1...Sg1
- 2.Qf2#
- 1...Sf2
- 2.Qxf2#
- 1...Sg5
- 2.Qf2#
- 1...Sg3
- 2.Qf6#
- 1...Sf6
- 2.Qxf6#
- 1...Sg7
- 2.Qf6#
- 1...g3!
- 1...Qxc4+
- 1.c5+?
- 1...Kd5
- 2.e4#
- 2.fxg4#
- 2.f4#
- 1...Qc4!
- 1...Kd5
- 1.Qg5?
- Keys
- 1.fxg4!
- 1...Qxc4+
- 2.Sc6#
- 1...Qe6+
- 2.Sxe6#
- 1...Qxg4+
- 2.Se6#
- 1...Qxd8+
- 2.Qxd8#
- 1...Qd5
- 2.cxd5#
- 1...Qf7
- 2.Sc6#
- 1...Qh7
- 2.Sc6#
- 2.Se6#
- 2.c5#
- 1...Qg5
- 2.Sc6#
- 2.Se6#
- 2.c5#
- 1...Qg6
- 2.c5#
- 1...Qg7
- 2.Sc6#
- 2.Se6#
- 2.c5#
- 1...Qe8
- 2.c5#
- 1...Qf8
- 2.c5#
- 1...Qh8
- 2.c5#
- 1...Sg1
- 2.Qf2#
- 1...Sf2
- 2.Qxf2#
- 1...S3f4
- 2.Qf2#
- 1...Sg5
- 2.Qf2#
- 1...Sg3
- 2.Qf6#
- 1...S5f4
- 2.Qf6#
- 1...Sf6
- 2.Qxf6#
- 1...Sg7
- 2.Qf6#
- 1...Qxc4+
- 1.fxg4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- Q(f);CHECK,N_PINS(K)::S(K),XQ(f)
- Q(f);N_PINS(K)::S(K)
- Q(f);CHECK,OGATE,XS(K)::QAR(H),XQ(f)
- S(a);N_GUARD::QAB(H)
- S(a);N_GUARD::QAB(H),XS(a)
- S(a);N_GUARD,N_SPINP(c)::QAB(H)
- S(d);N_GUARD::QAB(H)
- S(d);N_GUARD,N_SPINP(c)::QAB(H)
- S(d);N_GUARD::QAB(H),XS(d)
- Tries
- Try
- Q(H);N_PINP(c)
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK,N_PINS(K),P_SPINQ(f),XP(G)::S(K)
- Q(f);CHECK,N_PINS(K)::S(K),XQ(f)
- Q(f);CHECK,OGATE,XS(K)::QAR(H),XQ(f)
- S(a);::QAB1(H)
- Refutation
- S(a);XQ(H)
- Try
- Q(H);N_PINP(c)
- Threat
- DUALS(3)
- Vars
- Q(f);CHECK,N_PINS(K)::S(K),XQ(f)
- Q(f);CHECK,OGATE,XS(K)::QAR(H),XQ(f)
- Q(f);N_PINS(K)::QAB1(H)
- Q(f);N_GUARD::QAR2(H)
- Refutation
- Q(f);CHECK,N_PINS(K),P_SPINQ(f),XP(G)
- Try
- P(E);N_PINP(c)
- Vars
- Q(f);CHECK,N_PINS(K),P_SPINQ(f),XP(G)::S(K)
- Q(f);CHECK,N_PINS(K)::S(K),XQ(f)
- Q(f);CHECK,OGATE,XS(K)::QAR(H),XQ(f)
- S(a);N_GUARD,XP(E)::QAB(H)
- S(d);N_GUARD,XP(E)::QAB(H)
- Q(f);N_PINS(K),OGATE::R(F)+P(G),XQ(f)
- Q(f);N_PINS(K)::S(K)
- Q(f);N_GUARD,N_PINS(K)::R(F)+P(G)
- Q(f);N_GUARD::R(F)+P(G)
- S(a);N_GUARD::QAB(H)
- S(a);N_GUARD::QAB(H),XS(a)
- S(d);N_GUARD::QAB(H)
- S(d);N_GUARD::QAB(H),XS(d)
- Refutation
- P(c);
- Try
- P(G);CHECK
- Refutation
- Q(f);N_PINS(K),P_PINP(G),P_SPINQ(f)
- Try
- Actual
- P(E);XP(c)
- Vars
- Q(f);CHECK,N_PINS(K),P_SPINQ(f),XP(G)::S(K)
- Q(f);CHECK,N_PINS(K)::S(K),XQ(f)
- Q(f);CHECK,N_PINS(K),P_SPINQ(f),XP(E)::S(K)
- Q(f);CHECK,OGATE,XS(K)::QAR(H),XQ(f)
- Q(f);N_PINS(K),OGATE::R(F)+P(G),XQ(f)
- Q(f);N_PINS(K)::S(K)
- Q(f);N_GUARD,N_PINS(K)::R(F)+P(G)
- Q(f);N_GUARD::R(F)+P(G)
- S(a);N_GUARD::QAB(H)
- S(a);N_GUARD::QAB(H),XS(a)
- S(d);N_GUARD::QAB(H)
- S(d);N_GUARD::QAB(H),XS(d)
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).