MESON Chess Problem Database

Problem Display
PID: 225185 (8/8/8/8/8/6Bn/4k3/1BQ4K w - - 0 1)

Libis, Zdenek

Sachova skladba, 1989

8/8/8/8/8/6Bn/4k3/1BQ4K

#2

4 + 2

5454 Near Snap 2020
15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qe3+?
      • 1...Kd1
        • 2.Qe1#
      • 1...Kf1
        • 2.Bd3#
        • 2.Qe1#
        • 2.Qd3#
      • 1...Kxe3!
    • 1.Qd1+?
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxd1!
    • 1.Qc2+?
      • 1...Kf1
        • 2.Qd1#
        • 2.Qd3#
        • 2.Qg2#
        • 2.Qc4#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kf3!
  • Keys
    • 1.Qf1+!
      • 1...Kxf1
        • 2.Bd3#
      • 1...Kd2
        • 2.Qe1#
      • 1...Ke3
        • 2.Qd3#

Anticipated by 10574(1965)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);CHECK
    • Vars
      • K(a);S_FLIGHT,XQ(B)::B(A)
      • K(a);P-FLIGHT::QAB1(B)
      • K(a);OGATE,P-FLIGHT::QAR1(B)
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