MESON Chess Problem Database

Problem Display
PID: 183361 (B7/1n6/1R6/8/k7/8/K1P5/4B3 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2016

B7/1n6/1R6/8/k7/8/K1P5/4B3

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Rb4#
    • 1...Sc5
      • 2.Bc6#
  • Tries
    • 1.Rb5?
      • 1...Sd6
        • 2.Ra5#
      • 1...Sa5
        • 2.Rb4#
        • 2.Rxa5#
      • 1...Sc5
        • 2.Ra5#
      • 1...Sd8
        • 2.Ra5#
      • 1...Kxb5!
    • 1.Ra6+?
      • 1...Sa5
        • 2.Bc6#
        • 2.Rxa5#
      • 1...Kb5!
  • Keys
    • 1.c4!
      • 1...Sd6
        • 2.Ra6#
      • 1...Sa5
        • 2.Rb4#
      • 1...Sc5
        • 2.Bc6#
      • 1...Sd8
        • 2.Ra6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::R1(D)
    • S(b);OGATE::B(E)
  • Tries
    • Try
      • R(D);
      • Vars
        • S(b);N_GUARD::R1(D)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • R(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(C);
    • Vars
      • S(b);N_GUARD::R(D)
      • S(b);SBLOCK::R1(D)
      • S(b);OGATE::B(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).