MESON Chess Problem Database

Problem Display
PID: 67848 (2k1K2R/3pPP2/N1b1qpp1/N6p/2R2n2/4p2B/8/8 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

Chess, 1948

2k1K2R/3pPP2/N1b1qpp1/N6p/2R2n2/4p2B/8/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf7+
      • 2.Kxf7#
    • 1...Qe4
      • 2.Bxd7#
    • 1...Qe5
      • 2.Bxd7#
    • 1...Qxe7+
      • 2.Kxe7#
    • 1...d5+
      • 2.Rxc6#
    • 1...d6+
      • 2.Rxc6#
  • Tries
    • 1.Bxe6?
      • threat
        • 2.Bxd7#
        • 2.Rxc6#
      • 1...dxe6+
        • 2.Rxc6#
      • 1...Sd5
        • 2.Bxd7#
      • 1...Sxe6!
  • Keys
    • 1.Kf8!
      • threat
        • 2.Kg7#
      • 1...Qxf7+
        • 2.Kxf7#
      • 1...Qxe7+
        • 2.Kxe7#
      • 1...d5
        • 2.e8Q#
      • 1...d6
        • 2.e8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(e);CHECK,N_PINP(E),P_SPINP(h),XP(F)::R(H)+K(G),XQ(e)
    • Q(e);OGATE,P_SPINP(h)::B(A),XP(h)
    • Q(e);CHECK,P_SPINP(h),XP(E)::R(H)+K(G),XQ(e)
    • P(h);CHECK,N_GUARD,P_SPINQ(e)::R(B),XB(d)
  • Tries
    • Try
      • B(A);N_SPINP(E),P_PINP(h),XQ(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);CHECK,N_SPINP(h),XB(A)::R(B),XB(d)
        • S(b);::B(A),XP(h)
      • Refutation
        • S(b);N_SPINP(h),XB(A)
  • Actual
    • K(G);N_SPINP(E),P-FLIGHT
    • Threat
      • R(H)+K(G)
    • Vars
      • Q(e);CHECK,P_SPINP(h),XP(F)::R(H)+K(G),XQ(e)
      • Q(e);CHECK,P_SPINP(h),XP(E)::R(H)+K(G),XQ(e)
      • P(h);P_SPINQ(e)::P=Q
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