MESON Chess Problem Database

Problem Display
PID: 132401 (8/2B5/1Q4p1/4p1P1/3N3P/4k3/2P3P1/4K3 w - - 0 1)

Koltanowski, George

Source?, 0000

8/2B5/1Q4p1/4p1P1/3N3P/4k3/2P3P1/4K3

#2

8 + 3

2425 San Francisco Chronicle 0000

SOLUTION

  • SOUND
  • Sets
    • 1...exd4
      • 2.Qe6#
    • 1...e4
      • 2.Se2#
      • 2.Sb3#
      • 2.Sf3#
      • 2.Sb5#
      • 2.Sf5#
      • 2.Sc6#
      • 2.Se6#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qxe5#
      • 1...Ke4
        • 2.Qxe5#
      • 1...exd4
        • 2.Qe7#
        • 2.Qe5#
      • 1...e4
        • 2.Se2#
        • 2.Sb3#
        • 2.Sf3#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sc6#
        • 2.Se6#
        • 2.Qc3#
      • 1...Kf4!
    • 1.Qf6?
      • threat
        • 2.Qxe5#
      • 1...Ke4
        • 2.Qxe5#
      • 1...exd4
        • 2.Qe5#
        • 2.Qe7#
        • 2.Qf3#
        • 2.Qf4#
        • 2.Qe6#
      • 1...e4
        • 2.Bf4#
        • 2.Qf2#
      • 1...Kxd4!
  • Keys
    • 1.Qc6!
      • 1...Kxd4
        • 2.Bb6#
      • 1...Kf4
        • 2.Qf3#
      • 1...exd4
        • 2.Qf3#
        • 2.Qe8#
        • 2.Qe6#
      • 1...e4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATEB,P_SPINP(b),SBLOCK,XS(D)::QAR(G)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR2(G),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(G),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR2(G),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(G),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XS(D)
  • Actual
    • Q(G);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(D)::B(H)
      • K(a);P_SPINP(b),S_FLIGHT::QAR1(G)
      • P(b);SBLOCK::QAR2(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).