MESON Chess Problem Database

Problem Display
PID: 121488 (8/2pB3Q/3P4/3k4/1P1p1P2/8/P5K1/2b5 w - - 0 1)

Zalkind, Lazar Borissovich

Shakhmatnoe obozrenie, 1909

8/2pB3Q/3P4/3k4/1P1p1P2/8/P5K1/2b5

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxd3#
  • Tries
    • 1.Qf5+?
      • 1...Kxd6
        • 2.Qe6#
      • 1...Kc4!
    • 1.Qg6?
      • threat
        • 2.Qe6#
      • 1...d3
        • 2.Qxd3#
      • 1...Kc4!
    • 1.Qg8+?
      • 1...Kxd6
        • 2.Qe6#
      • 1...Ke4!
    • 1.Qf7+?
      • 1...Kxd6
        • 2.Qe6#
      • 1...Ke4!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qe6#
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kxd6
        • 2.Qe6#
      • 1...d3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAR2(G),XP(b)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(E)::QAR1(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • P(b);OGATEB::QAR2(G),XP(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(E)::QAR1(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(E)::QAR1(G)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • K(c);S_FLIGHT::QAB1(G)
      • K(c);P-FLIGHT,XP(E)::QAR1(G)
      • P(b);OGATEB::QAR2(G),XP(b)
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