MESON Chess Problem Database

Problem Display
PID: 226427 (8/4bKnN/N5Q1/3n1R2/3pkBb1/1R6/3P4/2r1r3 w - - 0 1)

Shire, David J

US Problem Bulletin, 1981

8/4bKnN/N5Q1/3n1R2/3pkBb1/1R6/3P4/2r1r3

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.d3#
    • 1...Ba3
      • 2.Sg5#
    • 1...Bb4
      • 2.Sg5#
    • 1...Bc5
      • 2.Sg5#
    • 1...Bg5
      • 2.Sxg5#
    • 1...Bd6
      • 2.Sg5#
    • 1...Bf8
      • 2.Sg5#
    • 1...Sf6
      • 2.Sg5#
    • 1...Sh5
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Se8
      • 2.Qe6#
  • Tries
    • 1.Sc5+?
      • 1...Bxc5
        • 2.Sg5#
      • 1...Rxc5!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Rf4#
      • 1...Bxf5
        • 2.Qg2#
      • 1...Bxd6
        • 2.Sg5#
      • 1...Sxf5
        • 2.Qe6#
      • 1...Sc3
        • 2.Sc5#
      • 1...Se3
        • 2.d3#
      • 1...Sb4
        • 2.Qxg4#
      • 1...Sf4
        • 2.Re5#
      • 1...Sb6
        • 2.Qxg4#
      • 1...Sf6
        • 2.Sg5#
      • 1...Sc7
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 9
  • Sets
    • B(e);SBLOCK::P(A)
    • B(g);N_GUARD::S(H)
    • B(g);N_GUARD::S(H),XB(g)
    • S(f);S_CUTB(g)::S(H)
    • S(h);N_GUARD::QAR2(F)
    • S(h);N_GUARD::QAR2(F),XS(h)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • B(g);XS(E)::S(H)
      • Refutation
        • R(a);XS(E)
  • Actual
    • B(C);
    • Threat
      • QAB(F)+R(D),DCHECK
    • Vars
      • B(e);OGATE,P_SPINB(e),SBLOCK,XR(D)::QAB(F)
      • B(g);N_GUARD,XB(C)::S(H)
      • S(h);N_GUARD,P_SPINS(h),XR(D)::QAR2(F)
      • S(f);S_CUTR(a)::S(E)
      • S(f);SBLOCK::P(A)
      • S(f);N_GUARD::QAR2(F),XB(e)
      • S(f);SBLOCK::QAB(F)+R(D),DCHECK
      • S(f);S_CUTB(g)::S(H)
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Developed and maintained by Brian Stephenson.
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