MESON Chess Problem Database

Problem Display
PID: 1967 (3B4/8/1K6/4kpN1/8/8/8/3Q4 w - - 0 1)

JB of Bridport (Brown, John)

Illustrated London News, 1863

3B4/8/1K6/4kpN1/8/8/8/3Q4

#2

4 + 2

3757 Schachminiaturen I 1902
785 Het Belgisch Schaakbord (L'Echiquier Belge) 1947
5454 Near Snap 2007
15351 SCPF/BCPS Black Books 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Kc5?
      • threat
        • 2.Qd4#
        • 2.Qd6#
      • 1...f4
        • 2.Qd5#
      • 1...Kf4!
    • 1.Kc6?
      • threat
        • 2.Qd6#
      • 1...f4
        • 2.Qd5#
      • 1...Kf4!
    • 1.Bf6+?
      • 1...Kf4
        • 2.Qf3#
      • 1...Kxf6!
  • Keys
    • 1.Qg1!
      • 1...Kf4
        • 2.Bc7#
      • 1...Kd5
        • 2.Qc5#
      • 1...Kd6
        • 2.Qd4#
      • 1...f4
        • 2.Qc5#

This anticipates 62402(1879), 224472(1888), 28904(1923), 57768(1995)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAB1(A)
      • Vars
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XB(D)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::B(D)
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAR2(A)
      • P(b);SBLOCK::QAR2(A)
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