MESON Chess Problem Database

Problem Display
PID: 99637 (8/8/8/8/8/K3Q3/B1k5/8 w - - 0 1)

Lazard, Frederic

Magyar Sakkvilag, 1925

8/8/8/8/8/K3Q3/B1k5/8

#2

3 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd1
      • 2.Bb3#
  • Tries
    • 1.Ka4?
      • 1...Kd1
        • 2.Bb3#
      • 1...Kb2!
    • 1.Kb4?
      • 1...Kd1
        • 2.Bb3#
      • 1...Kb2!
    • 1.Bc4?
      • 1...Kd1
        • 2.Bb3#
      • 1...Kb1!
    • 1.Bd5?
      • 1...Kd1
        • 2.Bb3#
      • 1...Kb1!
    • 1.Be6?
      • 1...Kd1
        • 2.Bb3#
      • 1...Kb1!
    • 1.Bf7?
      • 1...Kd1
        • 2.Bb3#
      • 1...Kb1!
    • 1.Bg8?
      • 1...Kd1
        • 2.Bb3#
      • 1...Kb1!
  • Keys
    • 1.Bb3+!
      • 1...Kb1
        • 2.Qg1#
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::B(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(A);CHECK
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