MESON Chess Problem Database

Problem Display
PID: 214466 (Q7/2K5/4kP2/8/1P6/8/3NN3/B7 w - - 0 1)

Norton, Frank

American Chess Journal, 1878

Q7/2K5/4kP2/8/1P6/8/3NN3/B7

#2

7 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qc8+?
      • 1...Kd5
        • 2.Sf4#
        • 2.Qf5#
        • 2.Qd7#
        • 2.Qg8#
      • 1...Kf7!
    • 1.Qe8+?
      • 1...Kd5
        • 2.Sf4#
        • 2.Qc6#
        • 2.Qd7#
        • 2.Qf7#
        • 2.Qe4#
        • 2.Qe5#
        • 2.Qg8#
      • 1...Kf5!
    • 1.Qf8?
      • 1...Kd5
        • 2.Sf4#
        • 2.Qd6#
        • 2.Qf7#
        • 2.Qg8#
      • 1...Kf5!
  • Keys
    • 1.Qd5+!
      • 1...Kxd5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(G);CHECK
    • Vars
      • K(a);S_FLIGHT,XQ(G)::S(C)
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