MESON Chess Problem Database

Problem Display
PID: 18386 (1R4Bk/5K1N/2p5/3P1p2/2P1p3/1p2B3/1pq4P/Q5bR w - - 0 1)

Ling, John Francis

Problem (Zagreb), 1955

1R4Bk/5K1N/2p5/3P1p2/2P1p3/1p2B3/1pq4P/Q5bR

#2

10 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Qxb2+?
      • 1...Qc3
        • 2.Qxc3#
      • 1...Qxb2!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Bh7#
      • 1...Qxh2
        • 2.Qxb2#
      • 1...Bxh2
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB(A),XQ(c)
      • Refutation
        • Q(c);XQ(A)
  • Actual
    • S(H);
    • Threat
      • R(I)+B(J)
    • Vars
      • Q(c);N_GUARD,P_SPINQ(c),XP(C)::QAB(A),XP(b)
      • B(a);N_GUARD,P_SPINB(a),XP(C)::B(D)
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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).