MESON Chess Problem Database

Problem Display
PID: 9782 (2nK4/p1P5/B1k5/2pN1N2/2n1P3/p7/1p5Q/1r6 w - - 0 1)

Westbury, Eric Ernest

HM., Tidskrift for Schack, 1909

2nK4/p1P5/B1k5/2pN1N2/2n1P3/p7/1p5Q/1r6

#2

7 + 8

15 British Chess Magazine 1911
3360 Simple Two-move Themes 1924
937 Sunday Referee 1930
3530 Het Half Pin Thema (II) 1947

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Sde7#
      • 2.Sfe7#
    • 1...Sd6
      • 2.Sfe7#
    • 1...Se7
      • 2.Sfxe7#
  • Tries
    • 1.Qd6+?
      • 1...S8xd6
        • 2.Sfe7#
      • 1...S4xd6!
    • 1.Qh6+?
      • 1...S8d6
        • 2.Sfe7#
        • 2.c8Q#
        • 2.c8R#
      • 1...S4d6!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qa4#
      • 1...S4b6
        • 2.Sb4#
      • 1...S4d6
        • 2.Sd4#
      • 1...S8b6
        • 2.Sde7#
      • 1...S8d6
        • 2.Sfe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(h);N_GUARD::S(D)
    • S(h);N_GUARD::S(D),XS(h)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(h);SBLOCK,XQ(A)::S(D)
      • Refutation
        • S(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • S(d);P_SPINP(e),SBLOCK::S(C)
      • S(d);P_SPINP(e),SBLOCK::S(D)
      • S(h);N_GUARD,SBLOCK::S(C)
      • S(h);N_GUARD,SBLOCK::S(D)
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