MESON Chess Problem Database

Problem Display
PID: 57570 (1R1N4/rb6/pkBB4/r7/p7/p2P4/K7/2R5 w - - 0 1)

Keeney, Palmer Gunkel

Chess Life, 1957

1R1N4/rb6/pkBB4/r7/p7/p2P4/K7/2R5

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Rxb7#
  • Tries
    • 1.Se6?
      • threat
        • 2.Bc7#
      • 1...Ra8
        • 2.Rxb7#
      • 1...Rc5!
    • 1.Bd7?
      • threat
        • 2.Bc7#
      • 1...Ra8
        • 2.Rxb7#
      • 1...Rc5!
    • 1.Be8?
      • threat
        • 2.Bc7#
      • 1...Ra8
        • 2.Rxb7#
      • 1...Rc5!
  • Keys
    • 1.Bb5!
      • 1...Kxb5
        • 2.Rb1#
      • 1...Rxb5
        • 2.Bc7#
      • 1...axb5
        • 2.Rc6#
      • 1...Ra8
        • 2.Rxb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD::R1(F),XB(g)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(E)
      • Vars
        • R(f);N_GUARD::R1(F),XB(g)
      • Refutation
        • R(c);
    • Try
      • B(D);
      • Threat
        • B(E)
      • Vars
        • R(f);N_GUARD::R1(F),XB(g)
      • Refutation
        • R(c);
    • Try
      • B(D);
      • Threat
        • B(E)
      • Vars
        • R(f);N_GUARD::R1(F),XB(g)
      • Refutation
        • R(c);
  • Actual
    • B(D);
    • Vars
      • K(e);OGATEB,P-FLIGHT,XB(D)::R(A)
      • R(c);SBLOCK,XB(D)::B(E)
      • P(d);SBLOCK,XB(D)::R1(A)
      • R(f);N_GUARD::R1(F),XB(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).