MESON Chess Problem Database

Problem Display
PID: 195145 (5kr1/2K1p1N1/6pP/4R1b1/1R6/B7/8/8 w - - 0 1)

McIlvane, John A

Pittsburgh Gazette-Times, 1918

5kr1/2K1p1N1/6pP/4R1b1/1R6/B7/8/8

#2

6 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Rxf4#
    • 1...e6
      • 2.Rf4#
  • Tries
    • 1.Rf4+?
      • 1...Bf6
        • 2.Rxf6#
      • 1...Bxf4!
  • Keys
    • 1.Rxe7!
      • threat
        • 2.Rb8#
      • 1...Bf4+
        • 2.Rxf4#
      • 1...Kxe7
        • 2.Rf4#
      • 1...Bxe7
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD,P_PINR(C)::R(B),XB(a)
    • P(c);::B(A)+R(B),DCHECK
  • Tries
    • Try
      • R(B);CHECK,P_PINP(c)
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::R(B),XB(a)
      • Refutation
        • B(a);P_PINR(C),XR(B)
  • Actual
    • R(C);XP(c)
    • Threat
      • R(B)
    • Vars
      • B(a);CHECK,N_GUARD::R(B),XB(a)
      • K(d);S_FLIGHT,XR(C)::B(A)+R(B)
      • B(a);N_GUARD,XR(C)::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).