MESON Chess Problem Database

Problem Display
PID: 147813 (8/8/5p2/8/8/n5K1/8/Qb4Nk w - - 0 1)

Shire, David J

The Problemist Supplement, 2012

8/8/5p2/8/8/n5K1/8/Qb4Nk

#2

3 + 4

3713 Snap 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Sf3?
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sb5
        • 2.Qxb1#
      • 1...f5
        • 2.Qh8#
      • 1...Sc2!
    • 1.Sh3?
      • 1...Sc2
        • 2.Qa8#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sb5
        • 2.Qxb1#
      • 1...f5!
  • Keys
    • 1.Se2!
      • 1...Sc2
        • 2.Qa8#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sb5
        • 2.Qxb1#
      • 1...f5
        • 2.Qh8#

Anticipated by 83819(1992)

This is a version of 22054

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);P_PINB(a)
      • Vars
        • S(c);N_GUARD::QAR(A),XB(a)
        • P(d);OGATE::QAB(A)
      • Refutation
        • S(c);
    • Try
      • S(B);P_PINB(a)
      • Vars
        • S(c);OGATE::QAB(A)
        • S(c);N_GUARD::QAR(A),XB(a)
      • Refutation
        • P(d);
  • Actual
    • S(B);P_PINB(a)
    • Vars
      • S(c);OGATE::QAB(A)
      • S(c);N_GUARD::QAR(A),XB(a)
      • P(d);OGATE::QAB(A)
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