MESON Chess Problem Database

Problem Display
PID: 11483 (3B3R/8/6Rb/6PP/4P2k/8/5N1P/2K5 w - - 0 1)

Dobbs, Gilbert S

Chess, 1939

3B3R/8/6Rb/6PP/4P2k/8/5N1P/2K5

#2

9 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh5
      • 2.Rgxh6#
      • 2.Rhxh6#
    • 1...Bxg5+
      • 2.Bxg5#
  • Tries
    • 1.Bc7?
      • 1...Kxh5
        • 2.Rhxh6#
      • 1...Bf8
        • 2.Bg3#
      • 1...Bg7
        • 2.Bg3#
      • 1...Bxg5+!
    • 1.Rg7?
      • 1...Bxg5+
        • 2.Bxg5#
      • 1...Kxh5
        • 2.Rxh6#
      • 1...Bxg7!
  • Keys
    • 1.Rf6!
      • 1...Bxg5+
        • 2.Rf4#
      • 1...Kxg5
        • 2.Rf5#
      • 1...Kxh5
        • 2.Rfxh6#
      • 1...Bf8
        • 2.Rf4#
      • 1...Bg7
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK,OGATE,P_SPINB(b),XP(E)::B(H),XB(b)
  • Tries
    • Try
      • B(H);
      • Vars
        • K(a);OGATEB,P-FLIGHT,P_SPINB(b),XP(F)::R1(I),XB(b)
        • B(b);N_PINP(E)::B(H)
      • Refutation
        • B(b);CHECK,XP(E)
    • Try
      • R(G);
      • Vars
        • B(b);CHECK,OGATE,P_SPINB(b),XP(E)::B(H),XB(b)
        • K(a);OGATEB,P-FLIGHT,P_SPINB(b),XP(F)::R1(I),XB(b)
      • Refutation
        • B(b);N_PINP(E),XR(G)
  • Actual
    • R(G);
    • Vars
      • B(b);CHECK,XP(E)::R(G)
      • K(a);OGATEB,S_FLIGHT,XP(E)::B(H)+R(G),DCHECK
      • K(a);OGATEB,P-FLIGHT,P_SPINB(b),XP(F)::R1(G),XB(b)
      • B(b);N_PINP(E)::R(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).