MESON Chess Problem Database

Problem Display
PID: 10738 (8/8/5Q2/5B2/5k2/8/6K1/8 w - - 0 1)

Speckmann, Werner

Comm., Stella Polaris, 1967

8/8/5Q2/5B2/5k2/8/6K1/8

#2

3 + 1

4349 Kleinste Schachaufgaben Drei- und Viersteiner 1970
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Bb1+?
      • 1...Ke3
        • 2.Qf2#
      • 1...Kg4!
    • 1.Bd3+?
      • 1...Kg4
        • 2.Be2#
      • 1...Ke3!
    • 1.Bg6+?
      • 1...Ke3
        • 2.Qf2#
      • 1...Kg4!
    • 1.Bh7+?
      • 1...Ke3
        • 2.Qf2#
      • 1...Kg4!
  • Keys
    • 1.Bc2+!
      • 1...Ke3
        • 2.Qf2#
      • 1...Kg4
        • 2.Bd1#

Anticipated by 10737(1967)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(a);P-FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(B);CHECK
    • Vars
      • K(a);OGATE,S_FLIGHT::QAB1(C)
      • K(a);P-FLIGHT::B(B)
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