MESON Chess Problem Database

Problem Display
PID: 162838 (8/4R3/8/4b3/8/5K2/6RP/5N1k w - - 0 1)

Lincoln, Robert A

Phenix, 2016

8/4R3/8/4b3/8/5K2/6RP/5N1k

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Sg3#
    • 1...Bb2
      • 2.Sg3#
    • 1...Bc3
      • 2.Sg3#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Bd4
      • 2.Sg3#
    • 1...Bf6
      • 2.Sg3#
    • 1...Bg7
      • 2.Sg3#
    • 1...Bh8
      • 2.Sg3#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Rg1#
      • 1...Bg3+
        • 2.Sxg3#
      • 1...Bxh2
        • 2.Rxh2#
      • 1...Bd4+!
  • Keys
    • 1.Reg7!
      • threat
        • 2.Rg1#
      • 1...Bxh2
        • 2.Rxh2#
      • 1...Bxg7
        • 2.Sg3#
      • 1...Bg3
        • 2.Sxg3#
      • 1...Bd4
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(b);N_GUARD,SBLOCK::S(A)
    • B(b);N_GUARD::S(A)
    • B(b);N_GUARD::S(A),XB(b)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • R1(B)
      • Vars
        • B(b);CHECK,N_GUARD::S(A),XB(b)
        • B(b);OGATE,XP(C)::R1(B),XB(b)
      • Refutation
        • B(b);CHECK
  • Actual
    • R(E);
    • Threat
      • R1(B)
    • Vars
      • B(b);OGATE,XP(C)::R1(B),XB(b)
      • B(b);N_GUARD,XR(E)::S(A)
      • B(b);N_GUARD::S(A),XB(b)
      • B(b);N_GUARD::S(A)
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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).