MESON Chess Problem Database

Problem Display
PID: 1940 (8/7B/8/6p1/6k1/8/1Q3K2/8 w - - 0 1)

Campbell, Joseph Graham

The Chess Player's Chronicle (Staunton), 1856

8/7B/8/6p1/6k1/8/1Q3K2/8

#2

3 + 2

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qd4#
  • Tries
    • 1.Qa3?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kh5
        • 2.Qh3#
      • 1...Kh4!
    • 1.Qc3?
      • 1...Kf4
        • 2.Qd4#
        • 2.Qg3#
      • 1...Kh5
        • 2.Qh3#
      • 1...Kh4!
    • 1.Qe2+?
      • 1...Kh3
        • 2.Qh5#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kh4!
    • 1.Qb3?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kh5
        • 2.Qh3#
      • 1...Kh4!
  • Keys
    • 1.Qh8!
      • 1...Kh3
        • 2.Bf5#
      • 1...Kf4
        • 2.Qd4#
      • 1...Kh4
        • 2.Bf5#
      • 1...Kh5
        • 2.Bf5#

This anticipates 42024(1861), 52607(1875), 230682(1898), 198315(1920), 81326(1972), 172337(1996), 205679(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(A)
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAR(A)+B(C),DCHECK
      • K(a);P-FLIGHT::QAR2(A)
      • K(a);P-FLIGHT::QAR(A)+B(C)
      • K(a);S_FLIGHT::QAR(A)+B(C)
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