MESON Chess Problem Database

Problem Display
PID: 273769 (3B2K1/5N2/2P3Q1/1b1k4/1P1p1b2/1P1p1N2/5P2/8 w - - 0 1)

Hersom, Donald H

The Problemist, 1932

3B2K1/5N2/2P3Q1/1b1k4/1P1p1b2/1P1p1N2/5P2/8

#2

9 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.S3g5?
      • threat
        • 2.Qe4#
        • 2.Qe6#
      • 1...Bd6
        • 2.Qe4#
        • 2.Qxd6#
      • 1...Bxg5!
    • 1.S7g5?
      • threat
        • 2.Qe6#
      • 1...Bd6
        • 2.Qe4#
      • 1...Bxg5!
  • Keys
    • 1.Qg2!
      • threat
        • 2.S3g5#
      • 1...Ke4
        • 2.Sh4#
      • 1...Kxc6
        • 2.S3e5#
      • 1...Ke6
        • 2.Sxd4#
      • 1...Bg5
        • 2.S3xg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Refutation
        • B(c);XS(C)
    • Try
      • S(G);
      • Threat
        • QAB1(F)
      • Vars
        • B(c);SBLOCK::QAB1(F)
      • Refutation
        • B(c);XS(G)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+S(C)
    • Vars
      • K(e);N_GUARD,S_FLIGHT::QAB(F)+S(C)
      • K(e);N_GUARD,S_FLIGHT,XP(E)::QAB(F)+S(C),DCHECK
      • K(e);N_GUARD,S_FLIGHT::S(C),XP(b)
      • B(c);::QAB(F)+S(C),XB(c)
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