MESON Chess Problem Database

Problem Display
PID: 84992 (Q7/3k1N2/3P3N/8/K7/8/8/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Kudesnik, 1992

Q7/3k1N2/3P3N/8/K7/8/8/8

#2

5 + 1

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb7+?
      • 1...Ke8
        • 2.Qc8#
        • 2.Qe7#
      • 1...Ke6!
    • 1.Qa6?
      • 1...Ke8
        • 2.Qc8#
      • 1...Ke6!
    • 1.Qb8?
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6!
  • Keys
    • 1.Qa5!
      • 1...Kc6
        • 2.Qb5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kc8
        • 2.Qc7#
      • 1...Ke8
        • 2.Qd8#

Anticipated by 24210(1927), 231090(1927), 33184(1938), 16378(1940), 30942(1943), 47022(1955), 73436(1961), 12363(1978), 46971(1989), 142078(1989)

This anticipates 120638(1995), 79159(2005)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);S_FLIGHT::QAR1(E)
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