MESON Chess Problem Database

Problem Display
PID: 76395 (8/4B3/2Q1b3/4k3/8/7N/7K/8 w - - 0 1)

Butwillo, Brother

The Tablet, 1928

(First published on Sat Feb 11 1928)

8/4B3/2Q1b3/4k3/8/7N/7K/8

#2

4 + 2

15239 Valois Notebooks 2014
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Bf6#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Bd5
        • 2.Qf6#
      • 1...Bf5
        • 2.Qd6#
      • 1...Kd4!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qc5#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Bd5
        • 2.Qf6#
      • 1...Bf5
        • 2.Qd6#

This anticipates 180955(1953), 157661(1961), 186847(2018)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::B(D)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
        • K(a);P-FLIGHT::QAB1(C)
        • B(b);OGATE,SBLOCK::QAB1(C)
        • B(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::QAB1(C)
      • B(b);OGATE,SBLOCK::QAB1(C)
      • B(b);SBLOCK::QAB1(C)
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