MESON Chess Problem Database

Problem Display
PID: 70982 (3K1k2/3BppR1/3p2qB/7N/1Q3N2/8/2b5/b7 w - - 0 1)

Sheppard, Charles William

Good Companions, 1919

3K1k2/3BppR1/3p2qB/7N/1Q3N2/8/2b5/b7

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qxe7#
    • 1...e5
      • 2.Rxg6#
    • 1...e6
      • 2.Qxd6#
    • 1...f5
      • 2.Sxg6#
    • 1...f6
      • 2.Se6#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Qb8#
      • 1...e6
        • 2.Qxd6#
      • 1...f5
        • 2.Sxg6#
      • 1...f6
        • 2.Se6#
      • 1...e5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Kc7#
      • 1...e5
        • 2.Rxg6#
      • 1...e6
        • 2.Qxd6#
      • 1...f5
        • 2.Sxg6#
      • 1...f6
        • 2.Se6#

This is a version of 21474

There are these versions: 21474

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATE,P_SPINP(e)::QAB1(A),XP(e)
    • P(e);P_SPINP(c),S_CUTB(a)::B(D)+R(F),XQ(d)
    • P(e);OGATEB,P_SPINP(c)::QAB(A),XP(c)
    • P(f);N_GUARD,S_CUTB(b)::S(B),XQ(d)
    • P(f);N_GUARD,S_CUTQ(d)::S(B)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • P(e);OGATEB,P_SPINP(c)::QAB(A),XP(c)
        • P(f);N_GUARD,S_CUTB(b)::S(B),XQ(d)
        • P(f);N_GUARD,S_CUTQ(d)::S(B)
      • Refutation
        • P(e);P_SPINP(c)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+K(G)
    • Vars
      • P(e);S_CUTB(a)::B(D)+R(F),XQ(d)
      • P(e);OGATEB::QAB(A),XP(c)
      • P(f);N_GUARD,S_CUTB(b)::S(B),XQ(d)
      • P(f);N_GUARD,S_CUTQ(d)::S(B)
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