MESON Chess Problem Database

Problem Display
PID: 205557 (8/8/8/2K5/B7/1pk5/4Q3/8 w - - 0 1)

Lazard, Frederic

La Strategie, 1925

8/8/8/2K5/B7/1pk5/4Q3/8

#2

3 + 2

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Qc2#
      • 2.Qe3#
  • Tries
    • 1.Kb5?
      • 1...b2
        • 2.Qe3#
      • 1...Kd4!
    • 1.Qd1?
      • 1...b2
        • 2.Qc2#
        • 2.Qd4#
      • 1...Kb2!
    • 1.Qf2?
      • 1...b2
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qc2#
      • 1...Kd3!
    • 1.Qg2?
      • 1...b2
        • 2.Qc2#
      • 1...Kd3!
    • 1.Qh2?
      • 1...b2
        • 2.Qc2#
      • 1...Kd3!
  • Keys
    • 1.Bb5!
      • 1...b2
        • 2.Qd3#

Anticipated by 184742(1908)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(a);SBLOCK::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);N_GUARD::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);N_GUARD::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(B);
    • Vars
      • P(a);SBLOCK::QAR1(A)
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