MESON Chess Problem Database
Problem Display
PID: 50492 (4B3/1K6/1RPPkB2/3rP3/N1rPP3/1Qn5/8/8 w - - 0 1)
Rice, John Michael
Sunday Citizen, 1967
#2
11 + 4
| 5174 | Chess Problem Spectrum | 2003 |
SOLUTION
- SOUND
- Sets
- 1...Rb4
- 2.Sc5#
- 1...Rcxd4
- 2.Sc5#
- 1...Rcc5
- 2.Sxc5#
- 1...Rdxd4
- 2.Sc5#
- 1...Rdc5
- 2.Sxc5#
- 1...Rxd6
- 2.Sc5#
- 1...Sb1
- 2.Qh3#
- 1...Sd1
- 2.Qh3#
- 1...Sa2
- 2.Qh3#
- 1...Se2
- 2.Qh3#
- 1...Sxa4
- 2.Qh3#
- 1...Sxe4
- 2.Qh3#
- 1...Sb5
- 2.Qh3#
- 1...Rb4
- Tries
- 1.Qxc4?
- threat
- 2.Sc5#
- 1...Sxa4
- 2.Qxd5#
- 1...Sxe4!
- threat
- 1.c7?
- 1...Rxc7+
- 2.dxc7#
- 1...Rxa4
- 2.d7#
- 2.c8Q#
- 2.c8B#
- 1...Rcxd4
- 2.Sc5#
- 2.d7#
- 2.c8Q#
- 2.c8B#
- 1...Rdxd4
- 2.Sc5#
- 2.c8Q#
- 2.c8B#
- 1...Rxe5
- 2.d7#
- 1...Rxd6
- 2.Sc5#
- 2.Rxd6#
- 2.c8Q#
- 2.c8B#
- 1...Sxa4
- 2.Qh3#
- 1...Sxe4
- 2.Qh3#
- 1...Rb4
- 2.Sc5#
- 2.c8Q#
- 2.c8B#
- 1...Rcc5
- 2.Sxc5#
- 1...Ra5
- 2.d7#
- 2.c8Q#
- 2.c8B#
- 1...Rb5
- 2.c8Q#
- 2.c8B#
- 1...Rdc5
- 2.Sxc5#
- 1...Sb1
- 2.Qh3#
- 1...Sd1
- 2.Qh3#
- 1...Sa2
- 2.Qh3#
- 1...Se2
- 2.Qh3#
- 1...Sb5
- 2.Qh3#
- 1...Rc6!
- 1...Rxc7+
- 1.Qxc4?
- Keys
- 1.d7!
- 1...Rxd7+
- 2.cxd7#
- 1...Rxa4
- 2.c7#
- 2.d8S#
- 1...Rcxd4
- 2.Sc5#
- 2.c7#
- 2.d8S#
- 1...Rxc6
- 2.Sc5#
- 2.Rxc6#
- 2.d8S#
- 1...Rdxd4
- 2.Sc5#
- 1...Rxe5
- 2.c7#
- 1...Sxa4
- 2.Qh3#
- 1...Sxe4
- 2.Qh3#
- 1...Rb4
- 2.Sc5#
- 2.d8S#
- 1...Rcc5
- 2.Sxc5#
- 2.d8S#
- 1...Ra5
- 2.c7#
- 2.d8S#
- 1...Rb5
- 2.d8S#
- 1...Rdc5
- 2.Sxc5#
- 2.d8S#
- 1...Rd6
- 2.Sc5#
- 1...Sb1
- 2.Qh3#
- 1...Sd1
- 2.Qh3#
- 1...Sa2
- 2.Qh3#
- 1...Se2
- 2.Qh3#
- 1...Sb5
- 2.Qh3#
- 1...Rxd7+
- 1.d7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- R(b);N_GUARD,P_PINR(F),P_SPINR(c)::S(B)
- R(b);N_GUARD,P_SPINR(c),XP(C)::S(B)
- R(b);N_GUARD,P_SPINR(c)::S(B),XR(b)
- R(c);N_GUARD,P_SPINR(b),XP(C)::S(B)
- R(c);N_GUARD,P_SPINR(b)::S(B),XR(c)
- R(c);N_GUARD,P_SPINR(b),XP(H)::S(B)
- S(a);OGATE::QAB(A)
- S(a);OGATE,XS(B)::QAB(A)
- S(a);OGATE,XP(D)::QAB(A)
- Tries
- Try
- Q(A);P_PINR(c),XR(b)
- Threat
- S(B)
- Vars
- S(a);N_GUARD,XS(B)::QAB1(A),XR(c)
- Refutation
- S(a);XP(D)
- Try
- P(G);
- Vars
- R(b);CHECK,OGATE,P_SPINR(c),XP(G)::R(F)+P(H),XR(b)
- R(c);N_GUARD,P_SPINR(b),XP(E)::R(F)+P(H)
- S(a);OGATE,XS(B)::QAB(A)
- S(a);OGATE,XP(D)::QAB(A)
- R(b);N_GUARD,P_SPINR(c)::S(B),XR(b)
- R(c);P_PINR(F),P_SPINR(b)::P=Q
- R(c);N_GUARD,P_SPINR(b)::S(B),XR(c)
- S(a);OGATE::QAB(A)
- Refutation
- R(b);P_SPINR(c)
- Try
- Actual
- P(H);
- Vars
- R(c);CHECK,OGATE,P_SPINR(b),XP(H)::R(F)+P(G),XR(c)
- R(c);N_GUARD,P_SPINR(b),XP(C)::S(B)
- R(c);N_GUARD,P_SPINR(b),XP(E)::R(F)+P(G)
- S(a);OGATE,XS(B)::QAB(A)
- S(a);OGATE,XP(D)::QAB(A)
- R(c);N_GUARD,P_PINR(F),P_SPINR(b)::P=S
- R(c);N_GUARD,P_SPINR(b)::S(B)
- S(a);OGATE::QAB(A)
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).