MESON Chess Problem Database

Problem Display
PID: 146831 (R1Q5/2rnBK2/P1k1n2R/1pP1pN2/1P4p1/4Nr2/b7/7B w - - 0 1)

Nietvelt, Gustaaf Josephus

Die Schwalbe, 1929

R1Q5/2rnBK2/P1k1n2R/1pP1pN2/1P4p1/4Nr2/b7/7B

#2

11 + 9

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc8
      • 2.Rxc8#
    • 1...Bb1
      • 2.Rxe6#
  • Tries
    • 1.Bxf3+?
      • 1...Bd5
        • 2.Bxd5#
        • 2.Rxe6#
      • 1...e4
        • 2.Sd4#
      • 1...gxf3!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Qxc7#
      • 1...Sf6+
        • 2.Se7#
      • 1...Rxc8
        • 2.Rxc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(h);OGATE,XQ(K)::R(J),XR(h)
    • B(a);N_GUARD::R(G),XS(g)
  • Tries
    • Try
      • B(A);CHECK,N_SPINS(E),P_PINR(h),XR(b)
      • Vars
        • P(e);P_SPINP(e)::S(E)
      • Refutation
        • P(c);XB(A)
  • Actual
    • B(H);
    • Threat
      • QAR1(K),XR(h)
    • Vars
      • S(i);CHECK,N_PINS(E),N_SPINS(g)::S(E)
      • R(h);OGATE,XQ(K)::R(J),XR(h)
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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).