MESON Chess Problem Database

Problem Display
PID: 233260 (1n3R2/1KQ1pNP1/pR2N1p1/r5P1/4k1p1/7q/3Pp1p1/5r2 w - - 0 1)

Muller, Dieter

Freie Presse, 1974

1n3R2/1KQ1pNP1/pR2N1p1/r5P1/4k1p1/7q/3Pp1p1/5r2

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qf4#
  • Tries
    • 1.Qc4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Kf5!
  • Keys
    • 1.Rb4+!
      • 1...Kd3
        • 2.Rd4#
        • 2.Qc3#
      • 1...Kf3
        • 2.Qf4#
      • 1...Kd5
        • 2.Qe5#
        • 2.Qc4#
      • 1...Kf5
        • 2.Sfd8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::QAR1(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • R(C);CHECK
    • Vars
      • K(e);S_FLIGHT::QAR1(F)
      • K(e);S_FLIGHT::R(I)+S(G)
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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).