MESON Chess Problem Database

Problem Display
PID: 184310 (6K1/3B4/6N1/2bk4/8/2Q5/8/8 w - - 0 1)

Boissy, Lucien

Bulletin Ouvrier des Echecs, 1949

6K1/3B4/6N1/2bk4/8/2Q5/8/8

#2

4 + 2

78 Bulletin Ouvrier des Echecs 1955
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qc6#
  • Keys
    • 1.Bb5!
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Bd4
        • 2.Qc6#
      • 1...Bd6
        • 2.Qc4#

Anticipated by 196689(1919), 22728(1937)

This anticipates 157900(2011)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE,SBLOCK::QAB1(A)
  • Actual
    • B(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);P-FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::QAR1(A)
      • B(a);OGATE,SBLOCK::QAB1(A)
      • B(a);SBLOCK::QAB1(A)
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