MESON Chess Problem Database

Problem Display
PID: 219067 (8/6R1/5p2/3K1k2/5p1p/8/6P1/4R3 w - - 0 1)

Arnold, William E

Baltimore American and Commercial Advertiser, 1882

8/6R1/5p2/3K1k2/5p1p/8/6P1/4R3

#2

4 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.g4+?
      • 1...fxg4 ep
        • 2.Rf1#
      • 1...hxg4 ep!
  • Keys
    • 1.Rf1!
      • 1...f3
        • 2.Rxf3#
      • 1...h3
        • 2.g4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(B);CHECK
      • Vars
        • P(a);EP,XP(B)::R(A)
      • Refutation
        • P(b);EP,XP(B)
  • Actual
    • R(A);P_PINP(a)
    • Vars
      • P(a);OGATEB::R(A),XP(a)
      • P(b);N_GUARD::P(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).