MESON Chess Problem Database

Problem Display
PID: 9500 (7Q/1K6/4k3/7P/8/B7/3N1N2/8 w - - 0 1)

Jackson, Harry S

Rivista Scacchistica Italiana, 1904

7Q/1K6/4k3/7P/8/B7/3N1N2/8

#2

6 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.Qc8#
  • Tries
    • 1.Sde4?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Sg5#
      • 1...Kd5!
    • 1.Sh3?
      • 1...Kd5
        • 2.Sf4#
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Sg5#
      • 1...Kf5!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kd7
        • 2.Qe7#
      • 1...Kxf6!
    • 1.Qf8?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kd7
        • 2.Qe7#
        • 2.Qc8#
      • 1...Ke5!
  • Keys
    • 1.Sf3!
      • 1...Kd5
        • 2.Qg8#
      • 1...Kf5
        • 2.Qe5#
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Sg5#

FEATURES

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