MESON Chess Problem Database
Problem Display
PID: 159358 (4RB2/8/5PN1/3p1r1p/r2k1p1R/3pN1P1/8/4QK2 w - - 0 1)
Rice, John Michael
Correspondence Chess, 1960
#2
9 + 7
| 133 | The Problemist Supplement | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qxa1#
- 1...Ra2
- 2.Qb4#
- 1...Ra3
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Sxf5#
- 1...Ra5
- 2.Qb4#
- 1...Ra6
- 2.Qb4#
- 1...Ra7
- 2.Qb4#
- 1...Ra8
- 2.Qb4#
- 1...Rg5
- 2.Rxf4#
- 1...d2
- 2.Qxd2#
- 1...Ra1
- Tries
- 1.Sxf4?
- 1...Rxf4+
- 2.Rxf4#
- 1...Re5
- 2.Se6#
- 1...d2
- 2.Qxd2#
- 1...Ra1
- 2.Qxa1#
- 1...Ra2
- 2.Qb4#
- 1...Ra3
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Sxf5#
- 1...Ra5
- 2.Qb4#
- 1...Ra6
- 2.Qb4#
- 1...Ra7
- 2.Qb4#
- 1...Ra8
- 2.Qb4#
- 1...Rg5
- 2.Se2#
- 1...Rxf6!
- 1...Rxf4+
- 1.Ba3?
- threat
- 2.Qa1#
- 1...Rxa3
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...d2
- 2.Qxd2#
- 1...Rc4
- 2.Sxf5#
- 1...Re5!
- threat
- 1.Qc1?
- threat
- 2.Sxf5#
- 2.Bc5#
- 2.Qb2#
- 2.Qc5#
- 1...Rxf6
- 2.Bc5#
- 2.Qb2#
- 2.Qc5#
- 1...d2
- 2.Qxd2#
- 1...Ra1
- 2.Sxf5#
- 2.Bc5#
- 2.Qxa1#
- 1...Ra2
- 2.Sxf5#
- 2.Bc5#
- 2.Qc5#
- 1...Ra3
- 2.Sxf5#
- 2.Bc5#
- 2.Qc5#
- 1...Rb4
- 2.Sxf5#
- 2.Bc5#
- 2.Qc5#
- 1...Rc4
- 2.Sxf5#
- 1...Ra5
- 2.Sxf5#
- 2.Qb2#
- 1...Rg5
- 2.Bc5#
- 2.Rxf4#
- 2.Qb2#
- 2.Qc5#
- 1...Re5!
- threat
- 1.Sxf4?
- Keys
- 1.gxf4!
- 1...Rxf4+
- 2.Rxf4#
- 1...Rxf6
- 2.f5#
- 1...Re5
- 2.fxe5#
- 1...d2
- 2.Qxd2#
- 1...Ra1
- 2.Qxa1#
- 1...Ra2
- 2.Qb4#
- 1...Ra3
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Sxf5#
- 1...Ra5
- 2.Qb4#
- 1...Ra6
- 2.Qb4#
- 1...Ra7
- 2.Qb4#
- 1...Ra8
- 2.Qb4#
- 1...Rg5
- 2.fxg5#
- 1...Rxf4+
- 1.gxf4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD,P_PINQ(A)::QAB(A),XR(b)
- R(b);N_GUARD::QAR2(A)
- R(b);N_GUARD::QAR2(A),XR(b)
- R(b);SBLOCK::S(C),XR(f)
- R(f);N_GUARD::R(E),XP(d)
- P(a);OGATEB::QAR2(A),XP(a)
- Tries
- Try
- S(G);P_SPINS(G),XP(d)
- Vars
- R(f);CHECK,OGATE,P_SPINR(f),XS(G)::R(E),XR(f)
- R(f);N_PINS(G),SBLOCK::R(E)+S(G),DCHECK
- P(a);OGATEB::QAR2(A),XP(a)
- R(b);N_GUARD,P_PINQ(A)::QAB(A),XR(b)
- R(b);N_GUARD::QAR2(A)
- R(b);N_GUARD::QAR2(A),XR(b)
- R(b);SBLOCK::S(C),XR(f)
- R(f);N_PINS(G)::R(E)+S(G),DCHECK
- Refutation
- R(f);XP(F)
- Try
- B(I);
- Threat
- QAB(A)
- Vars
- R(b);N_GUARD,XB(I)::QAR2(A)
- R(b);N_GUARD::QAR2(A),XR(b)
- P(a);OGATEB::QAR2(A),XP(a)
- R(b);SBLOCK::S(C),XR(f)
- Refutation
- R(f);
- Try
- Q(A);
- Threat
- DUALS(4)
- Vars
- P(a);OGATEB::QAR2(A),XP(a)
- R(b);::S(C),XR(f)
- Refutation
- R(f);
- Try
- Actual
- P(D);P_SPINP(D),XP(d)
- Vars
- R(f);CHECK,OGATE,P_SPINR(f),XP(D)::R(E),XR(f)
- R(f);XP(F)::R(E)+P(D)
- R(f);N_PINP(D)::R(E)+P(D),XR(f)
- P(a);OGATEB::QAR2(A),XP(a)
- R(b);N_GUARD,P_PINQ(A)::QAB(A),XR(b)
- R(b);N_GUARD::QAR2(A)
- R(b);N_GUARD::QAR2(A),XR(b)
- R(b);SBLOCK::S(C),XR(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).