MESON Chess Problem Database

Problem Display
PID: 133127 (2kr3K/3p4/P2B4/1p6/8/2p5/Q5R1/8 w - - 0 1)

Boyer, Jean-Pierre

diagrammes, 1983

2kr3K/3p4/P2B4/1p6/8/2p5/Q5R1/8

#2

5 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Qg8?
      • 1...Rxg8+
        • 2.Rxg8#
      • 1...Re8
        • 2.Qxe8#
      • 1...Rf8
        • 2.Qxf8#
      • 1...c2
        • 2.Rxc2#
      • 1...b4!
  • Keys
    • 1.Rg8!
      • 1...Rxg8+
        • 2.Qxg8#
      • 1...Re8
        • 2.Rxe8#
      • 1...Rf8
        • 2.Rxf8#
      • 1...c2
        • 2.Qxc2#
      • 1...b4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = WHITE_IN_CHECK
  • Tries
    • Try
      • Q(A);P_PINR(e),P_SPINQ(A)
      • Vars
        • R(e);CHECK,N_SPINR(e),OGATE,XQ(A)::R(B),XR(e)
        • R(e);::QAR2(A),XR(e)
        • R(e);::QAR(A),XR(e)
        • P(a);OGATEB::R(B),XP(a)
      • Refutation
        • P(b);
  • Actual
    • R(B);P_PINR(e),P_SPINR(B)
    • Vars
      • R(e);CHECK,N_SPINR(e),OGATE,XR(B)::QAR(A),XR(e)
      • R(e);::R(B),XR(e)
      • P(a);OGATEB::QAR(A),XP(a)
      • P(b);N_GUARD::QAR(A)
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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).