MESON Chess Problem Database

Problem Display
PID: 107606 (8/8/8/8/2K1p3/kNN4Q/8/2b5 w - - 0 1)

Authier, Gabriel

Chess, 1951

8/8/8/8/2K1p3/kNN4Q/8/2b5

#2

4 + 3

78 Bulletin Ouvrier des Echecs 1955
6490 yacpdb 2009
5454 Near Snap 2015

SOLUTION

  • SOUND
  • Tries
    • 1.Qh1?
      • threat
        • 2.Qxc1#
      • 1...Kb2
        • 2.Qxc1#
      • 1...Bd2
        • 2.Qa1#
      • 1...Be3
        • 2.Qa1#
      • 1...Bf4
        • 2.Qa1#
      • 1...Bg5
        • 2.Qa1#
      • 1...Bh6
        • 2.Qa1#
      • 1...Bb2!
    • 1.Qh2?
      • threat
        • 2.Qa2#
      • 1...Bb2
        • 2.Qd6#
      • 1...Bd2!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qxc1#
      • 1...Kb2
        • 2.Qxc1#
      • 1...Bd2
        • 2.Qa1#
      • 1...Bb2
        • 2.Qf8#
      • 1...Be3
        • 2.Qa1#
      • 1...Bf4
        • 2.Qa1#
      • 1...Bg5
        • 2.Qa1#
      • 1...Bh6
        • 2.Qa1#

This anticipates 153757(1957)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB(C),XB(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(C),XB(a)
        • B(a);OGATE::QAR2(C)
      • Refutation
        • B(a);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • B(a);SBLOCK::QAB(C)
      • Refutation
        • B(a);
  • Actual
    • Q(C);
    • Threat
      • QAB(C),XB(a)
    • Vars
      • K(b);S_FLIGHT::QAB1(C),XB(a)
      • B(a);OGATE::QAR2(C)
      • B(a);SBLOCK::QAB(C)
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