MESON Chess Problem Database

Problem Display
PID: 249553 (3Q2K1/8/6k1/8/6P1/8/8/8 w - - 0 1)

Grob, Frank

Deutsche Schachzeitung, 1968

3Q2K1/8/6k1/8/6P1/8/8/8

#2

3 + 1

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kh6
      • 2.Qf6#
  • Tries
    • 1.Kh8?
      • 1...Kh6
        • 2.Qf6#
      • 1...Kf7!
    • 1.Qa5?
      • 1...Kh6
        • 2.Qh5#
      • 1...Kf6!
    • 1.Qd4?
      • threat
        • 2.Qg7#
      • 1...Kh6
        • 2.Qf6#
        • 2.Qg7#
      • 1...Kg5!
    • 1.Qd5?
      • 1...Kh6
        • 2.Qh5#
      • 1...Kf6!
  • Keys
    • 1.Qe7!
      • 1...Kh6
        • 2.Qf6#
        • 2.Qg7#

FEATURES

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