MESON Chess Problem Database

Problem Display
PID: 231561 (8/6p1/5pQ1/2KPk3/8/6P1/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1927

8/6p1/5pQ1/2KPk3/8/6P1/8/8

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qe6#
  • Tries
    • 1.Kc4?
      • 1...f5
        • 2.Qe6#
      • 1...Kd6!
    • 1.g4?
      • threat
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...Kf4!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qe6#
        • 2.Qf4#
      • 1...f5
        • 2.Qd4#
      • 1...g5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::QAR1(D)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);OGATE::QAR1(D)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • P(A);
      • Threat
        • QAR1(D)
      • Vars
        • P(b);::QAR1(D),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);SBLOCK::QAB1(D)
      • P(c);::QAR1(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).