MESON Chess Problem Database

Problem Display
PID: 241267 (8/KN6/4N3/1k6/1P6/1R6/8/3R4 w - - 0 1)

Lincoln, Robert A

Variantim, 2013

8/KN6/4N3/1k6/1P6/1R6/8/3R4

#2

6 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.b5#
  • Tries
    • 1.Sd4+?
      • 1...Ka4
        • 2.Sc5#
        • 2.Ra1#
      • 1...Kc4!
    • 1.Sec5?
      • 1...Kc4
        • 2.Sd6#
      • 1...Kc6!
    • 1.Sbc5?
      • 1...Kc6
        • 2.b5#
      • 1...Kc4!
    • 1.Sd6+?
      • 1...Ka4
        • 2.Sc5#
      • 1...Kc6!
    • 1.Rdd3?
      • 1...Kc4
        • 2.Sd6#
      • 1...Kc6
        • 2.b5#
      • 1...Ka4!
    • 1.Rd4?
      • 1...Kc6
        • 2.b5#
      • 1...Ka4!
  • Keys
    • 1.Sc7+!
      • 1...Ka4
        • 2.Sc5#
      • 1...Kc4
        • 2.Sa5#
      • 1...Kc6
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATE,S_FLIGHT::P(C)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::S(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);
      • Vars
        • K(a);OGATE,S_FLIGHT::P(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(a);S_FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);S_FLIGHT::S(F)
        • K(a);OGATE,S_FLIGHT::P(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);OGATE,S_FLIGHT::P(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);CHECK
    • Vars
      • K(a);S_FLIGHT::S(F)
      • K(a);S_FLIGHT::R(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).