MESON Chess Problem Database

Problem Display
PID: 241868 (5R2/5b2/3P1k2/2K5/4P1Q1/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1931

5R2/5b2/3P1k2/2K5/4P1Q1/8/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qf5#
  • Tries
    • 1.Rxf7+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Kxf7!
    • 1.Qh5?
      • 1...Ke6
        • 2.Qf5#
      • 1...Kg7!
    • 1.Qg5+?
      • 1...Ke6
        • 2.Qe7#
        • 2.Qf5#
      • 1...Kxg5!
    • 1.Qg6+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Kxg6!
  • Keys
    • 1.d7!
      • 1...Ke5
        • 2.Qf5#
      • 1...Ke7
        • 2.d8Q#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),S_FLIGHT::QAR1(B)
  • Tries
    • Try
      • R(E);CHECK,XB(b)
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XR(E)
    • Try
      • Q(B);
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT,XQ(B)
  • Actual
    • P(D);
    • Vars
      • K(a);N_SPINB(b),S_FLIGHT::QAR1(B)
      • K(a);N_SPINB(b),S_FLIGHT::P=Q
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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).