MESON Chess Problem Database

Problem Display
PID: 76834 (6B1/8/8/5k2/5B2/8/3Q2K1/8 w - - 0 1)

Butwillo, Brother

The Tablet, 1947

(First published on Sat Feb 15 1947)

6B1/8/8/5k2/5B2/8/3Q2K1/8

#2

4 + 1

5454 Near Snap 2014
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Bh7#
  • Tries
    • 1.Qd5+?
      • 1...Kg4
        • 2.Qg5#
      • 1...Kf6
        • 2.Qf7#
        • 2.Qg5#
      • 1...Kg6
        • 2.Qf7#
        • 2.Qg5#
      • 1...Kxf4!
    • 1.Qd6?
      • 1...Ke4
        • 2.Bh7#
      • 1...Kg4!
  • Keys
    • 1.Bh6!
      • 1...Ke4
        • 2.Qd5#
      • 1...Kg4
        • 2.Qg5#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#

Anticipated by 2392(0000), 120940(1877), 214368(1878), 9327(1880), 222385(1884), 222932(1885), 184881(1908), 189438(1911), 189685(1912)

This anticipates 103960(1993), 202752(2016)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(D)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::QAB1(A)
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