MESON Chess Problem Database

Problem Display
PID: 152425 (8/1n5N/3bn1B1/Q1Bk4/8/8/4N3/1K6 w - - 0 1)

North, William

Good Companions (November First Attempt Ty.), 1915

8/1n5N/3bn1B1/Q1Bk4/8/8/4N3/1K6

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bd4#
  • Tries
    • 1.Sc3+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Kc6
        • 2.Be8#
      • 1...Ke5!
  • Keys
    • 1.Sf6+!
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke5
        • 2.Bd4#
      • 1...Kc6
        • 2.Be4#
        • 2.Be8#
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR(C)+B(D),DCHECK
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::B(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(F);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::QAR(C)+B(D),DCHECK
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