MESON Chess Problem Database

Problem Display
PID: 56805 (8/2Q5/3p1N1K/4k3/8/8/3PN3/8 w - - 0 1)

Durebert, ?

Bulletin de la FFE, 1925

8/2Q5/3p1N1K/4k3/8/8/3PN3/8

#2

5 + 2

5454 Near Snap 2007
3713 Snap 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Qxd6+?
      • 1...Kf5
        • 2.Sg3#
        • 2.Sd4#
      • 1...Kxd6!
  • Keys
    • 1.Sd4!
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qxd6#
      • 1...Kxf6
        • 2.Qg7#

Anticipated by 2576(1871), 4559(1879), 167298(1879), 51071(1880), 182361(1906), 194195(1917), 195099(1918), 22068(1924), 205551(1925)

This anticipates 231139(1927), 60792(1929), 58199(1997)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK,XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(E)
  • Actual
    • S(B);
    • Vars
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(B)::QAB1(E)
      • K(a);S_FLIGHT::QAB(E),XP(b)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XS(C)::QAB1(E)
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