MESON Chess Problem Database

Problem Display
PID: 208796 (8/6Q1/4k3/8/1K6/8/5N1B/8 w - - 0 1)

Thornton, George Howard

Buffalo Globe, 1876

8/6Q1/4k3/8/1K6/8/5N1B/8

#2

4 + 1

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qd7#
  • Tries
    • 1.Kb5?
      • 1...Kd5
        • 2.Qe5#
        • 2.Qd7#
      • 1...Kf5!
    • 1.Bg3?
      • 1...Kd5
        • 2.Qd7#
      • 1...Kf5!
    • 1.Be5?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kd5!
    • 1.Bc7?
      • 1...Kd5
        • 2.Qd7#
      • 1...Kf5!
    • 1.Bb8?
      • 1...Kd5
        • 2.Qd7#
      • 1...Kf5!
    • 1.Qf8?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kd7!
    • 1.Qh7?
      • 1...Kd5
        • 2.Qe4#
        • 2.Qd7#
      • 1...Kf6!
  • Keys
    • 1.Bf4!
      • 1...Kd5
        • 2.Qd7#
      • 1...Kf5
        • 2.Qf7#

This anticipates 77657(1986)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(D)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(B);
    • Vars
      • K(a);S_FLIGHT::QAR2(D)
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