MESON Chess Problem Database

Problem Display
PID: 273363 (3k1bR1/3p3n/pP3P2/2B1N3/B1b3q1/KR6/7Q/8 w - - 0 1)

Hersom, Donald H

British Chess Magazine, 1934

3k1bR1/3p3n/pP3P2/2B1N3/B1b3q1/KR6/7Q/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Rxf8#
  • Tries
    • 1.Sf7+?
      • 1...Kc8
        • 2.Qc7#
        • 2.b7#
      • 1...Bxf7
        • 2.Qb8#
      • 1...Ke8!
  • Keys
    • 1.b7!
      • threat
        • 2.b8Q#
      • 1...Kc7
        • 2.b8Q#
      • 1...Ke8
        • 2.b8Q#
        • 2.b8R#
      • 1...d5
        • 2.Sf7#
      • 1...d6
        • 2.Bb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD::R(I),XB(g)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(a);XS(F)::QAR2(A)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(d)
  • Actual
    • P(G);
    • Threat
      • P=Q
    • Vars
      • K(f);N_SPINB(g),S_FLIGHT::P=Q
      • K(f);P-FLIGHT,P_SPINP(d)::P=Q
      • P(d);S_CUTB(a)::S(F)
      • P(d);N_PINB(E)::B(E)
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