MESON Chess Problem Database

Problem Display
PID: 206941 (2R5/n2K1pp1/1p3kP1/8/p4P1N/r1Pp4/1Nb5/4R3 w - - 0 1)

Delta

New York Clipper, 1857

2R5/n2K1pp1/1p3kP1/8/p4P1N/r1Pp4/1Nb5/4R3

#2

8 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Rxc6#
    • 1...fxg6
      • 2.Rf8#
  • Tries
    • 1.Re5?
      • threat
        • 2.Rf5#
      • 1...fxg6
        • 2.Rf8#
      • 1...d2!
    • 1.Re7?
      • threat
        • 2.Rxf7#
      • 1...fxg6
        • 2.Rf8#
      • 1...Bb3!
  • Keys
    • 1.Re6+!
      • 1...fxe6
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(g);N_GUARD::R(H),XS(g)
    • P(h);OGATEB,XP(F)::R(H)
  • Tries
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • P(h);OGATEB,XP(F)::R(H)
      • Refutation
        • P(c);
    • Try
      • R(A);
      • Threat
        • R1(A),XP(h)
      • Vars
        • P(h);OGATEB,XP(F)::R(H)
      • Refutation
        • B(a);
  • Actual
    • R(A);CHECK
    • Vars
      • P(h);XR(A)::R(H)
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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).