MESON Chess Problem Database

Problem Display
PID: 11865 (1R6/3N4/2K1Q2p/p2Np3/P1k5/2b5/3P1Bbq/1Bnr4 w - - 0 1)

Quack, Godfrey C

The Problemist, 1972

1R6/3N4/2K1Q2p/p2Np3/P1k5/2b5/3P1Bbq/1Bnr4

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Sxc3#
      • 2.Sb4#
      • 2.Sf4#
      • 2.S5f6#
      • 2.Sc7#
      • 2.Se7#
    • 1...Bxd5+
      • 2.Qxd5#
    • 1...Sb3
      • 2.Sb6#
    • 1...Sd3
      • 2.Ba2#
    • 1...e4
      • 2.Sxc3#
      • 2.Sb4#
      • 2.Sf4#
      • 2.S5f6#
      • 2.Sc7#
      • 2.Se7#
  • Tries
    • 1.Bc2?
      • threat
        • 2.Sb6#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Bd4!
    • 1.d3+?
      • 1...Sxd3
        • 2.Ba2#
      • 1...Rxd3!
  • Keys
    • 1.Kc7!
      • threat
        • 2.Qc6#
      • 1...e4+
        • 2.Sf4#
      • 1...Bxd5
        • 2.Qa6#
      • 1...Bb4
        • 2.S5b6#
      • 1...Bd4
        • 2.Se3#
      • 1...Sb3
        • 2.S7b6#
      • 1...Sd3
        • 2.Ba2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(c);CHECK,OGATE,P_SPINB(c),XS(E)::QAB1(G),XB(c)
    • S(a);SBLOCK::S(H)
    • S(a);N_GUARD,SBLOCK::B(A)
  • Tries
    • Try
      • B(A);
      • Threat
        • S(H)
      • Vars
        • B(c);CHECK,OGATE,P_SPINB(c),XS(E)::QAB1(G),XB(c)
      • Refutation
        • B(e);
    • Try
      • P(B);CHECK
      • Vars
        • S(a);SBLOCK,XP(B)::B(A)
      • Refutation
        • R(b);XP(B)
  • Actual
    • K(F);N_SPINS(E),P-FLIGHT
    • Threat
      • QAR2(G)
    • Vars
      • P(h);CHECK,S_CUTB(c)::QAB(G)+S(E)
      • B(c);P_SPINB(c),SBLOCK,XS(E)::QAB(G)
      • B(e);SBLOCK::QAB(G)+S(E),DCHECK
      • S(a);SBLOCK::S(H)
      • S(a);N_GUARD,SBLOCK::B(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).