MESON Chess Problem Database

Problem Display
PID: 227677 (4QK2/8/7k/8/5P2/5P2/8/8 w - - 0 1)

Lazard, Frederic

Magyar Sakkvilag, 1926

4QK2/8/7k/8/5P2/5P2/8/8

#2

4 + 1

6490 yacpdb 2020
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kh7
      • 2.Qh5#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Qh8#
      • 1...Kh5
        • 2.Qh8#
      • 1...Kh7!
    • 1.Qb5?
      • 1...Kh7
        • 2.Qh5#
      • 1...Kg6!
    • 1.Qd7?
      • 1...Kh5
        • 2.Qh7#
      • 1...Kg6!
    • 1.Qe5?
      • 1...Kh7
        • 2.Qg7#
        • 2.Qh5#
      • 1...Kg6!
    • 1.Qe7?
      • 1...Kh5
        • 2.Qg5#
        • 2.Qh7#
      • 1...Kg6!
    • 1.f5?
      • threat
        • 2.Qg6#
      • 1...Kh7
        • 2.Qh5#
      • 1...Kg5!
  • Keys
    • 1.Qe4!
      • 1...Kh5
        • 2.Qh7#

This anticipates 218850(1987)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(C)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • QAR2(C)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(B);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::QAR2(C)
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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).