MESON Chess Problem Database

Problem Display
PID: 108366 (Q7/8/7p/3K1pkp/7N/2B4P/8/8 w - - 0 1)

Halkett, James Brooke

Chicago Tribune, 1884

Q7/8/7p/3K1pkp/7N/2B4P/8/8

#2

5 + 4

6490 yacpdb 2009
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qd8#
  • Tries
    • 1.Sf3+?
      • 1...Kg6
        • 2.Qg8#
      • 1...Kf4!
    • 1.Bd2+?
      • 1...Kf6
        • 2.Qf8#
      • 1...f4
        • 2.Qd8#
      • 1...Kxh4!
    • 1.Qb8?
      • threat
        • 2.Qg3#
      • 1...f4
        • 2.Qd8#
      • 1...Kxh4!
    • 1.Qg8+?
      • 1...Kf4
        • 2.Bd2#
      • 1...Kxh4!
  • Keys
    • 1.Qa3!
      • 1...Kf4
        • 2.Bd2#
      • 1...Kxh4
        • 2.Bf6#
      • 1...f4
        • 2.Qe7#

Anticipated by 214637(1878)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);SBLOCK::QAB(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
        • P(a);P_SPINP(a)::QAB(E)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • P(a);SBLOCK::QAB(E)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • K(b);S_FLIGHT,XS(C)::B(A)
      • P(a);SBLOCK::QAB(E)
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Developed and maintained by Brian Stephenson.
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