MESON Chess Problem Database

Problem Display
PID: 1023 (6K1/6B1/3P4/2QrN2k/7p/4PN1p/7P/3B4 w - - 0 1)

Shire, David J

The Problemist Supplement, 1996

6K1/6B1/3P4/2QrN2k/7p/4PN1p/7P/3B4

#2

9 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qg4#
        • 2.Qxh4#
      • 1...Rd4
        • 2.Qf7#
      • 1...Rxe5!
    • 1.Qc8?
      • threat
        • 2.Qg4#
        • 2.Qf5#
        • 2.Qe8#
      • 1...Rxd6
        • 2.Qg4#
        • 2.Qf5#
      • 1...Rd4
        • 2.Qf5#
        • 2.Qe8#
      • 1...Rxe5!
  • Keys
    • 1.Sf7!
      • 1...Kg4
        • 2.Sd4#
      • 1...Kg6
        • 2.Sxh4#
      • 1...Rxc5
        • 2.S3e5#
      • 1...Re5
        • 2.S3xe5#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Rg5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);OGATE::QAB(E)
      • Refutation
        • R(c);XS(F)
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Refutation
        • R(c);XS(F)
  • Actual
    • S(F);P_PINR(c)
    • Vars
      • K(d);N_SPINR(c),S_FLIGHT::B(A)+S(D)
      • K(d);N_SPINR(c),S_FLIGHT::S(D),XP(b)
      • R(c);N_GUARD,N_SPINR(c),XQ(E)::B(A)+S(D)
      • R(c);N_GUARD::B(A)+S(D),XR(c)
      • R(c);OGATE::QAR2(E),XR(c)
      • R(c);OGATE,P_PINB(H)::QAR1(E),XR(c)
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