MESON Chess Problem Database

Problem Display
PID: 173133 (8/8/8/8/8/4p3/4R2R/1k2K3 w - - 0 1)

Ling, John Francis

Problem Observer, 2000

8/8/8/8/8/4p3/4R2R/1k2K3

#2

3 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Ra2?
      • 1...Kc1
        • 2.Ra1#
      • 1...e2!
    • 1.Rb2+?
      • 1...Kc1
        • 2.Rhc2#
      • 1...Ka1!
    • 1.Rc2?
      • 1...Ka1
        • 2.Rc1#
      • 1...e2!
  • Keys
    • 1.Kf1!
      • threat
        • 2.Re1#
      • 1...Ka1
        • 2.Re1#
      • 1...Kc1
        • 2.Re1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • P(b);
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • P(b);
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • R(B)
    • Vars
      • K(a);P-FLIGHT::R(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).