MESON Chess Problem Database

Problem Display
PID: 51888 (QNb5/2k5/4p3/2K3B1/8/8/8/8 w - - 0 1)

Zimmer, Eligiusz

StrateGems, 2004

QNb5/2k5/4p3/2K3B1/8/8/8/8

#2

4 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Sa6#
  • Tries
    • 1.Sa6+?
      • 1...Kd7
        • 2.Qc6#
      • 1...Bxa6!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qc6#
      • 1...Kxd7
        • 2.Qc6#
      • 1...Bxd7
        • 2.Bd8#
      • 1...Bb7
        • 2.Qd8#

Anticipated by 6418(1929), 10015(1961)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD,SBLOCK::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • B(c);XS(D)
  • Actual
    • S(D);
    • Threat
      • QAR1(C)
    • Vars
      • K(b);P-FLIGHT,XS(D)::QAB1(C)
      • B(c);SBLOCK,XS(D)::B(B)
      • B(c);OGATE,SBLOCK::QAB1(C)
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