MESON Chess Problem Database

Problem Display
PID: 205562 (3k4/1Kn2Q2/8/8/5N2/8/8/8 w - - 0 1)

Lazard, Frederic

La Strategie, 1925

3k4/1Kn2Q2/8/8/5N2/8/8/8

#2

3 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Se6#
    • 1...Sd5
      • 2.Se6#
    • 1...Sa6
      • 2.Se6#
    • 1...Se6
      • 2.Sxe6#
    • 1...Sa8
      • 2.Se6#
    • 1...Se8
      • 2.Se6#
  • Tries
    • 1.Kb8?
      • 1...Sb5
        • 2.Se6#
      • 1...Sd5
        • 2.Se6#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sa8
        • 2.Se6#
      • 1...Se8
        • 2.Se6#
      • 1...Sa6+!
  • Keys
    • 1.Kc6!
      • threat
        • 2.Qd7#
      • 1...Kc8
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);N_GUARD::S(A)
        • S(a);N_GUARD::S(A),XS(a)
      • Refutation
        • S(a);CHECK
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • QAR1(C)
    • Vars
      • K(b);P-FLIGHT::QAR1(C),XS(a)
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