MESON Chess Problem Database

Problem Display
PID: 206988 (1k4r1/6q1/1PP5/8/4B2K/8/Rr6/8 w - - 0 1)

Anonymous

Chess Monthly, 1859

1k4r1/6q1/1PP5/8/4B2K/8/Rr6/8

#2

5 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc8
      • 2.Ra8#
  • Tries
    • 1.c7+?
      • 1...Qxc7
        • 2.Ra8#
      • 1...Kc8!
  • Keys
    • 1.Ra8+!
      • 1...Kxa8
        • 2.c7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT::R(A)
  • Tries
    • Try
      • P(E);CHECK
      • Vars
        • Q(b);XP(E)::R1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • R(A);CHECK
    • Vars
      • K(c);P-FLIGHT,XR(A)::B(B)+P(E)
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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).