MESON Chess Problem Database

Problem Display
PID: 144441 (1KB1k3/2B2nQ1/7n/8/8/8/8/8 w - - 0 1)

Makaronets, Leonid

StrateGems, 1998

1KB1k3/2B2nQ1/7n/8/8/8/8/8

#2

4 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Bd7#
    • 1...Sd6
      • 2.Bd7#
    • 1...Sd8
      • 2.Bd7#
    • 1...Sh8
      • 2.Bd7#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Qf8#
      • 1...Kd8
        • 2.Qf8#
      • 1...Sxd6!
  • Keys
    • 1.Bd8!
      • 1...Kxd8
        • 2.Qf8#
      • 1...Sxd8
        • 2.Bd7#
      • 1...Sg4
        • 2.Qg8#
      • 1...Sf5
        • 2.Qg8#
      • 1...Sg8
        • 2.Qxg8#
      • 1...Se5
        • 2.Qe7#
      • 1...Sg5
        • 2.Qe7#
      • 1...Sd6
        • 2.Qe7#
      • 1...Sh8
        • 2.Qe7#

Anticipated by 119885(1933), 6846(1934)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(b);::B(D)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR1(B)
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • S(b);XB(A)
  • Actual
    • B(A);
    • Vars
      • K(c);P-FLIGHT,XB(A)::QAR2(B)
      • S(b);SBLOCK,XB(A)::B(D)
      • S(a);N_GUARD::QAR2(B)
      • S(a);N_GUARD::QAR2(B),XS(a)
      • S(b);OGATE::QAR1(B)
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