MESON Chess Problem Database

Problem Display
PID: 4994 (6b1/4Np2/1B6/b2p1p1K/Q3Nk2/8/4P3/8 w - - 0 1)

Challenger, Alfred Clement

Hampstead and Highgate Express, 1896

6b1/4Np2/1B6/b2p1p1K/Q3Nk2/8/4P3/8

#2

6 + 6

3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...f6
      • 2.Sg6#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Sxd5#
      • 1...dxe4
        • 2.Qd6#
      • 1...f6
        • 2.Sg6#
      • 1...fxe4!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Sxd5#
      • 1...Kxe4
        • 2.Sg6#
      • 1...Ke5
        • 2.Sg6#
      • 1...dxe4
        • 2.Qb8#
      • 1...fxe4
        • 2.Qb8#
      • 1...d4
        • 2.Sd5#
      • 1...f6
        • 2.Sg6#

This is a version of 151189

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD::S(F)
  • Tries
    • Try
      • Q(B);
      • Threat
        • S(F),XP(c)
      • Vars
        • P(c);OGATE,P_SPINP(c),SBLOCK,XS(C)::QAB(B)
        • P(e);N_GUARD::S(F)
      • Refutation
        • P(d);P_SPINP(d),XS(C)
  • Actual
    • Q(B);
    • Threat
      • S(F),XP(c)
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAR(B)+S(F)
      • K(a);S_FLIGHT::QAR(B)+S(F),DCHECK
      • P(c);SBLOCK,XS(C)::QAB(B)
      • P(d);SBLOCK,XS(C)::QAB(B)
      • P(c);::S(F)
      • P(e);N_GUARD::S(F)
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