MESON Chess Problem Database

Problem Display
PID: 139066 (4k2r/pNpp1rp1/Kp4Bp/2Q1pp2/8/8/8/8 w - - 0 1)

Drucker, J

Source?, 1927

4k2r/pNpp1rp1/Kp4Bp/2Q1pp2/8/8/8/8

#2

4 + 11

56 The Problemist 1937

SOLUTION

  • SOUND
  • Sets
    • 1...Rf8
      • 2.Qxe5#
  • Tries
    • 1.Qxc7?
      • threat
        • 2.Qd8#
      • 1...Kf8
        • 2.Qd8#
      • 1...Ke7!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxf7#
      • 1...Ke7
        • 2.Qxf7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...Rf8
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(k);SBLOCK::QAR(A),XP(a)
  • Tries
    • Try
      • Q(A);XP(f)
      • Threat
        • QAR1(A)
      • Vars
        • K(j);N_SPINR(h),P-FLIGHT::QAR2(A)
      • Refutation
        • K(j);N_SPINR(h),P-FLIGHT,P_SPINP(g)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XR(h)
    • Vars
      • K(j);N_SPINR(h),P-FLIGHT::QAR1(A),XR(h)
      • R(k);SBLOCK::QAR(A),XP(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).