MESON Chess Problem Database

Problem Display
PID: 248222 (8/2bPpkr1/3B1p2/3N1p2/3Q1n2/1B1p1r1R/2PKnqb1/8 w - - 0 1)

von Bilow, Ludwig Immanuel

New York Albion, 1870

(First published on Sat Oct 15 1870)

8/2bPpkr1/3B1p2/3N1p2/3Q1n2/1B1p1r1R/2PKnqb1/8

#2

8 + 12

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Sxf4#
  • Tries
    • 1.Sxf4+?
      • 1...e6
        • 2.Bxe6#
      • 1...Kf8!
  • Keys
    • 1.Qxf6+!
      • 1...Kg8
        • 2.Sxe7#
      • 1...exf6
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(j);N_GUARD::B(C)+S(F),XS(f)
  • Tries
    • Try
      • S(F);CHECK,XS(f)
      • Vars
        • P(j);P_SPINP(j)::B(C),XP(j)
      • Refutation
        • K(k);P-FLIGHT,P_SPINP(j)
  • Actual
    • Q(E);CHECK,XP(h)
    • Vars
      • K(k);S_FLIGHT::B(C)+S(F),DCHECK,XP(j)
      • P(j);SBLOCK,XQ(E)::B(C)+S(F),XS(f)
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