MESON Chess Problem Database

Problem Display
PID: 76677 (7K/4Qp2/8/5k2/7P/5B2/8/8 w - - 0 1)

Butwillo, Brother

The Tablet, 1943

(First published on Sat Feb 27 1943)

7K/4Qp2/8/5k2/7P/5B2/8/8

#2

4 + 2

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Kg6
      • 2.Qg5#
    • 1...f6
      • 2.Qe4#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Qf6#
        • 2.Qe4#
      • 1...f6
        • 2.Qxf6#
        • 2.Qe4#
      • 1...Kf4!
    • 1.Kh7?
      • 1...f6
        • 2.Qe4#
      • 1...Kf4!
    • 1.Kg8?
      • 1...Kg6
        • 2.Qg5#
      • 1...f6
        • 2.Qe4#
      • 1...Kf4!
    • 1.Bh1?
      • 1...Kf4
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...f6
        • 2.Qe4#
      • 1...Kg4!
    • 1.Bd5?
      • threat
        • 2.Qg5#
      • 1...Kf4
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...f6
        • 2.Qe4#
      • 1...Kg4!
    • 1.Bc6?
      • 1...Kf4
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...f6
        • 2.Qe4#
      • 1...Kg4!
    • 1.Bb7?
      • 1...Kf4
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...f6
        • 2.Qe4#
      • 1...Kg4!
    • 1.Ba8?
      • 1...Kf4
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...f6
        • 2.Qe4#
      • 1...Kg4!
    • 1.Qe3?
      • 1...Kg6
        • 2.Qg5#
      • 1...f6
        • 2.Qe4#
      • 1...Kf6!
    • 1.Qe5+?
      • 1...Kg6
        • 2.Qg5#
      • 1...Kxe5!
  • Keys
    • 1.Bg2!
      • 1...Kf4
        • 2.Qg5#
      • 1...Kg4
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...f6
        • 2.Qe4#

Anticipated by 76477(1932)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(C)
    • P(b);SBLOCK::QAB1(C)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR1(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR1(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR1(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR1(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::QAR1(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
  • Actual
    • B(A);
    • Vars
      • K(a);P-FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::QAR1(C)
      • P(b);SBLOCK::QAB1(C)
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