MESON Chess Problem Database

Problem Display
PID: 15592 (3Q4/8/1N6/1k6/1p2K3/1N6/P7/8 w - - 0 1)

Wong, Peter

Chess in Australia, 1986

3Q4/8/1N6/1k6/1p2K3/1N6/P7/8

#2

5 + 2

2838 Fun with Chess Miniatures 1996
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sa4?
      • 1...Kxa4
        • 2.Qa5#
      • 1...Kc4
        • 2.Qd3#
        • 2.Qd5#
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6!
    • 1.Sc4?
      • 1...Ka4
        • 2.Qa5#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6!
    • 1.Sc8?
      • 1...Ka4
        • 2.Qa5#
      • 1...Kc4
        • 2.Qd3#
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6!
  • Keys
    • 1.Sa8!
      • 1...Ka4
        • 2.Qa5#
      • 1...Kc4
        • 2.Qd3#
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6
        • 2.Qd5#

Anticipated by 227835(1926)

This anticipates 120640(1992)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • K(b);S_FLIGHT,XS(D)::QAR1(E)
        • K(b);S_FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(D)::QAB1(E)
        • K(b);S_FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(b);S_FLIGHT::QAR1(E)
        • K(b);S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(b);S_FLIGHT::QAR1(E)
      • K(b);S_FLIGHT::QAB1(E)
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