MESON Chess Problem Database

Problem Display
PID: 24938 (4k3/3pPp2/8/8/8/4R3/4K3/4Q3 w - - 0 1)

Hartong, Jan

2nd HM., Bulletin Ouvrier des Echecs, 1948

4k3/3pPp2/8/8/8/4R3/4K3/4Q3

#2

4 + 3

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1952
3713 Snap 2001
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qd8#
        • 2.Qa8#
      • 1...d5
        • 2.Qd8#
        • 2.Qa4#
        • 2.Qb5#
      • 1...d6
        • 2.Qd8#
        • 2.Qa4#
        • 2.Qb5#
      • 1...f6
        • 2.Qh5#
      • 1...f5!
    • 1.Qb1?
      • threat
        • 2.Qb8#
      • 1...d5
        • 2.Qb5#
      • 1...d6
        • 2.Qb5#
      • 1...f6
        • 2.Qg6#
      • 1...f5!
    • 1.Qh1?
      • threat
        • 2.Qa8#
        • 2.Qh8#
      • 1...d6
        • 2.Qc6#
      • 1...f5
        • 2.Qh5#
      • 1...f6
        • 2.Qh5#
      • 1...d5!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qh8#
      • 1...d5
        • 2.Qa4#
      • 1...d6
        • 2.Qa4#
      • 1...f5
        • 2.Qh5#
      • 1...f6
        • 2.Qh5#

Anticipated by 23611(1945)

This anticipates 18342(1955)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATEB::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(a);OGATEB::QAB(A)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);OGATEB::QAB(A)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • P(a);OGATEB::QAB(A)
      • P(b);OGATEB::QAB(A)
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