MESON Chess Problem Database

Problem Display
PID: 142 (1bR3B1/1Nn1Nq2/1np3R1/5p1K/2k3p1/8/1Q2P3/7b w - - 0 1)

Sheppard, Charles William

American Chess Bulletin, 1950

1bR3B1/1Nn1Nq2/1np3R1/5p1K/2k3p1/8/1Q2P3/7b

#2

8 + 9

788 US Problem Bulletin 1963

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Rxc6#
    • 1...Sd5
      • 2.Rxc6#
    • 1...c5
      • 2.Sa5#
      • 2.Sd6#
  • Tries
    • 1.Bxf7+?
      • 1...Bd5
        • 2.Rxc6#
      • 1...Sbd5
        • 2.Rxc6#
      • 1...Scd5
        • 2.Rgxc6#
        • 2.Rcxc6#
      • 1...Se6!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.Qd4#
      • 1...Qd5
        • 2.Rxc6#
      • 1...Sbd5
        • 2.Sfd6#
      • 1...Scd5
        • 2.Rxc6#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(h);N_PINR(D)::R(D),XP(f)
    • S(g);N_SPINQ(h),OGATE,P_SPINP(f)::R(G),XP(f)
  • Tries
    • Try
      • B(H);CHECK,N_SPINR(D),XQ(h)
      • Vars
        • B(a);P_SPINB(a)::R(D),XP(f)
        • S(e);P_SPINS(e)::R(D),XP(f)
      • Refutation
        • S(g);P_SPINP(f),P_SPINS(g)
  • Actual
    • S(F);XP(d)
    • Threat
      • S(F)
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • Q(h);N_PINR(D),P_PINS(F)::R(D),XP(f)
      • S(e);N_SPINQ(h),SBLOCK::S(F)
      • S(g);N_SPINQ(h),OGATE,P_SPINP(f),SBLOCK::R(G),XP(f)
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