MESON Chess Problem Database

Problem Display
PID: 242074 (8/7p/7p/4P1kp/4Q3/7K/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1936

8/7p/7p/4P1kp/4Q3/7K/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...h4
      • 2.Qg4#
  • Tries
    • 1.Qf4+?
      • 1...Kg6
        • 2.Qf6#
      • 1...Kxf4!
    • 1.Qh4+?
      • 1...Kg6
        • 2.Qf6#
      • 1...Kf5!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qf6#
      • 1...Kg6
        • 2.Qf6#
      • 1...h4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(a);P-FLIGHT::QAR1(B)
      • P(b);N_GUARD::QAR1(B)
HTML5 logo

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).