MESON Chess Problem Database

Problem Display
PID: 110127 (8/5Q2/5P2/5k2/R7/6BN/7K/8 w - - 0 1)

Lebedev, Aleksandr N

Kudesnik, 1999

8/5Q2/5P2/5k2/R7/6BN/7K/8

#2

6 + 1

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Ra3?
      • 1...Kg4
        • 2.Qg6#
      • 1...Ke4!
    • 1.Ra5+?
      • 1...Kg4
        • 2.Qh5#
      • 1...Ke4!
    • 1.Qd7+?
      • 1...Kxf6
        • 2.Ra6#
      • 1...Kg6!
    • 1.Qh7+?
      • 1...Kxf6
        • 2.Ra6#
      • 1...Ke6!
  • Keys
    • 1.Sf4!
      • 1...Kg4
        • 2.Qh5#
      • 1...Ke5
        • 2.Qe6#
      • 1...Kg5
        • 2.Qg6#

Anticipated by 43065(1969), 11855(1972), 11858(1972)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Vars
        • K(a);S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(E)::R(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(E)::R(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(F)
      • K(a);P-FLIGHT::QAR1(F)
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