MESON Chess Problem Database

Problem Display
PID: 46511 (5N1k/1Q4pP/7n/8/8/1K6/8/8 w - - 0 1)

Barda, Olaf Martinius (AKA OM Olsen)

Tidskrift for Schack, 1956

5N1k/1Q4pP/7n/8/8/1K6/8/8

#2

4 + 3

4884 154 norske miniatyrproblemer 1974
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Sg6#
    • 1...g6
      • 2.Sxg6#
  • Tries
    • 1.Qd5?
      • 1...g5
        • 2.Qd4#
        • 2.Qe5#
      • 1...g6
        • 2.Qd4#
        • 2.Qe5#
      • 1...Sf5
        • 2.Qg8#
      • 1...Sg4
        • 2.Qg8#
      • 1...Sg8
        • 2.Qxg8#
        • 2.hxg8Q#
        • 2.hxg8R#
      • 1...Sf7!
    • 1.Qf7?
      • 1...Sf5
        • 2.Qg8#
      • 1...Sg4
        • 2.Qg8#
      • 1...Sg8
        • 2.Qxg8#
        • 2.hxg8Q#
        • 2.hxg8R#
      • 1...g5
        • 2.Sg6#
        • 2.Qf6#
      • 1...g6
        • 2.Sxg6#
        • 2.Qf6#
      • 1...Sxf7!
  • Keys
    • 1.Qh1!
      • 1...g5
        • 2.Qa1#
      • 1...g6
        • 2.Qa1#
      • 1...Sf5
        • 2.Sg6#
      • 1...Sg4
        • 2.Sg6#
      • 1...Sf7
        • 2.Sg6#
      • 1...Sg8
        • 2.Sg6#

This anticipates 80039(1983), 214405(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(b);::S(D)
    • P(b);::S(D),XP(b)
  • Tries
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • P(b);OGATEB::QAB(B)
      • S(a);::S(D)
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Developed and maintained by Brian Stephenson.
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