MESON Chess Problem Database

Problem Display
PID: 12393 (4r3/Qb4r1/1R5N/4kP2/1P1RN3/1B1p4/5Pp1/b2K2B1 w - - 0 1)

Quack, Godfrey C

The Problemist, 1978

4r3/Qb4r1/1R5N/4kP2/1P1RN3/1B1p4/5Pp1/b2K2B1

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Re6#
  • Tries
    • 1.Bh2+?
      • 1...Kxd4
        • 2.Re6#
      • 1...Rg3!
  • Keys
    • 1.Sg5!
      • threat
        • 2.f4#
      • 1...Bf3+
        • 2.Sxf3#
      • 1...Kxd4
        • 2.Qxa1#
      • 1...Bxd4
        • 2.Bh2#
      • 1...Re6
        • 2.Rxe6#
      • 1...Be4
        • 2.Rxe4#
      • 1...Bc6
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT,XR(F)::QAB(K)+R(I)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(F)::QAB(K)+R(I)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • S(G);
    • Threat
      • P(C)
    • Vars
      • B(e);CHECK,N_GUARD::S(G),XB(e)
      • K(d);OGATEB,S_FLIGHT,XR(F)::QAB(K),XB(a)
      • B(a);SBLOCK,XR(F)::B(B)
      • R(g);N_GUARD::R1(I),XR(g)
      • B(e);N_GUARD::R1(F),XB(e)
      • B(e);OGATE::QAB(K),XR(f)
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