MESON Chess Problem Database

Problem Display
PID: 146134 (b7/r2p3N/p3p1p1/K1Q1rkpp/1R6/6P1/2RNp3/1B6 w - - 0 1)

Rains, Cyril George

The Observer, 1932

(First published on Sun Nov 6 1932)

b7/r2p3N/p3p1p1/K1Q1rkpp/1R6/6P1/2RNp3/1B6

#2

8 + 11

14868 Pirnie Collection 2012
5454 Near Snap 2018
15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5+
      • 2.Rxc5#
    • 1...Rb7
      • 2.Rc1#
      • 2.Ra2#
      • 2.Rcb2#
      • 2.Rc3#
      • 2.Rcc4#
    • 1...Bd5
      • 2.Qf8#
    • 1...g4
      • 2.Rf4#
    • 1...h4
      • 2.g4#
    • 1...d5
      • 2.Qf2#
  • Keys
    • 1.Sf1!
      • threat
        • 2.Se3#
      • 1...Rxc5+
        • 2.Rxc5#
      • 1...exf1Q
        • 2.Rf2#
      • 1...exf1S
        • 2.Rf2#
      • 1...exf1B
        • 2.Rf2#
      • 1...exf1R
        • 2.Rf2#
      • 1...Rd5
        • 2.Rxe2#
      • 1...e1Q
        • 2.Rf2#
      • 1...e1R
        • 2.Rf2#
      • 1...Bd5
        • 2.Qf8#
      • 1...d5
        • 2.Qf2#

Anticipated by 145190(1926)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(b);CHECK,N_SPINR(b),OGATE,XQ(G)::B(A)+R(B),DCHECK,XR(b)
    • B(k);N_PINQ(G),N_SPINR(b)::QAR(G)
    • P(d);N_GUARD::R1(E)
    • P(e);N_GUARD::P(D)
    • P(j);N_PINQ(G),N_SPINR(b)::QAR(G)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • R(b);CHECK,N_SPINR(b),OGATE,XQ(G)::B(A)+R(B),DCHECK,XR(b)
      • P(a);OGATE,XS(C)::B(A)+R(B),DCHECK
      • R(b);S_CUTB(k)::B(A)+R(B),XP(a)
      • P(a);OGATE,P_PINR(E)::B(A)+R(B),DCHECK
      • P(a);OGATE::B(A)+R(B),DCHECK
      • B(k);N_PINQ(G),N_SPINR(b)::QAR(G)
      • P(j);N_PINQ(G),N_SPINR(b)::QAR(G)
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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).