MESON Chess Problem Database

Problem Display
PID: 140558 (b7/Q1qpN3/1r3BNK/4p3/1Pnk1p2/1Pp2P2/2Pb4/3RR3 w - - 0 1)

Coombes, TA

The Problemist, 1943

b7/Q1qpN3/1r3BNK/4p3/1Pnk1p2/1Pp2P2/2Pb4/3RR3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Rxe4#
    • 1...Bd5
      • 2.Sf5#
    • 1...Sd6
      • 2.Bxe5#
    • 1...d5
      • 2.Sf5#
  • Tries
    • 1.Sh4?
      • threat
        • 2.Shf5#
      • 1...Be4
        • 2.Rxe4#
      • 1...Sd6
        • 2.Bxe5#
      • 1...Se3!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Sf5#
      • 1...Be4
        • 2.Rxe4#
      • 1...Se3
        • 2.Se2#
      • 1...Sd6
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(j);N_GUARD::R1(B),XB(j)
    • B(j);SBLOCK::S(K)
    • S(c);N_GUARD,S_CUTQ(h)::B(G),XP(f)
    • P(i);SBLOCK::S(K)
  • Tries
    • Try
      • S(H);P_SPINB(G)
      • Threat
        • S(H)
      • Vars
        • B(j);N_GUARD::R1(B),XB(j)
        • S(c);N_PINB(G)::B(G),XP(f)
      • Refutation
        • S(c);
  • Actual
    • S(H);P_SPINB(G),P_SPINS(H),XP(e)
    • Threat
      • S(K)
    • Vars
      • B(j);N_GUARD::R1(B),XB(j)
      • S(c);N_PINS(H),SBLOCK::S(H)
      • S(c);N_PINB(G)::B(G),XP(f)
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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).