MESON Chess Problem Database

Problem Display
PID: 42024 (8/7B/5Q2/6p1/6k1/8/5K2/8 w - - 0 1)

Campbell, Joseph Graham

The Chess Player's Chronicle (Staunton), 1861

8/7B/5Q2/6p1/6k1/8/5K2/8

#2

3 + 2

3360 Simple Two-move Themes 1924
934 Social Chess Quarterly (The) 1934
3295 Einfuhrung in die Welt des Schachproblem 1984
15 British Chess Magazine 1993
3310 2345 Chess Problems 1997
3713 Snap 2004
5626 European Junior Chess Solving Championship 2005
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Bf5+?
      • 1...Kh4
        • 2.Qh8#
        • 2.Qh6#
      • 1...Kh5
        • 2.Qh8#
      • 1...Kf4!
    • 1.Qc3?
      • 1...Kf4
        • 2.Qd4#
        • 2.Qg3#
      • 1...Kh5
        • 2.Qh3#
      • 1...Kh4!
    • 1.Qxg5+?
      • 1...Kh3
        • 2.Qg3#
        • 2.Qh5#
      • 1...Kxg5!
    • 1.Qf5+?
      • 1...Kh5
        • 2.Qh3#
      • 1...Kh4!
    • 1.Qe6+?
      • 1...Kf4
        • 2.Qf5#
        • 2.Qe4#
      • 1...Kh5
        • 2.Qh3#
      • 1...Kh4!
    • 1.Qg6?
      • 1...Kh3
        • 2.Qh5#
      • 1...Kf4
        • 2.Qe4#
        • 2.Qf5#
      • 1...Kh4!
    • 1.Qf7?
      • 1...Kh3
        • 2.Qh5#
      • 1...Kh4!
  • Keys
    • 1.Qh8!
      • 1...Kh3
        • 2.Bf5#
      • 1...Kf4
        • 2.Qd4#
      • 1...Kh4
        • 2.Bf5#
      • 1...Kh5
        • 2.Bf5#

Anticipated by 1940(1856)

This anticipates 52607(1875), 230682(1898), 198315(1920), 81326(1972), 172337(1996)

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK,XP(b)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,P_SPINP(b),S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAR(B)+B(C),DCHECK
      • K(a);P-FLIGHT::QAR2(B)
      • K(a);P-FLIGHT::QAR(B)+B(C)
      • K(a);S_FLIGHT::QAR(B)+B(C)
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