MESON Chess Problem Database

Problem Display
PID: 121467 (1K6/5Q2/4p2P/3pk3/6P1/2P4P/3P4/8 w - - 0 1)

Zalkind, Lazar Borissovich

La Strategie, 1912

1K6/5Q2/4p2P/3pk3/6P1/2P4P/3P4/8

#2

7 + 3

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qc7#
  • Tries
    • 1.Qxe6+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kxe6!
    • 1.Qf2?
      • 1...Ke4
        • 2.Qe3#
      • 1...d4
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Qc7+?
      • 1...Kf6
        • 2.Qg7#
      • 1...Ke4!
    • 1.d3?
      • 1...Kd6
        • 2.Qc7#
      • 1...d4!
    • 1.d4+?
      • 1...Kd6
        • 2.Qc7#
      • 1...Ke4!
  • Keys
    • 1.Qa7!
      • 1...Ke4
        • 2.Qe3#
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd6
        • 2.Qc7#
      • 1...Kf6
        • 2.Qg7#
      • 1...d4
        • 2.Qxd4#

Anticipated by 103452(1888)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(F)
  • Tries
    • Try
      • Q(F);CHECK,XP(c)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • K(b);P-FLIGHT,XQ(F)
    • Try
      • Q(F);
      • Vars
        • K(b);P-FLIGHT::QAR1(F)
        • P(a);::QAB1(F),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(A);
      • Vars
        • K(b);S_FLIGHT::QAB1(F)
      • Refutation
        • P(a);
    • Try
      • P(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(F)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(b);P-FLIGHT::QAR1(F)
      • K(b);S_FLIGHT::QAB1(F)
      • P(a);::QAB1(F),XP(a)
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