MESON Chess Problem Database

Problem Display
PID: 132771 (R6K/3Nk3/8/1Q6/5P2/8/B7/8 w - - 0 1)

Lebedev, Leonid Arsentevich

Babruiskae zhytisse, 1996

R6K/3Nk3/8/1Q6/5P2/8/B7/8

#2

6 + 1

5454 Near Snap 2009
136 Problem Observer 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sb6?
      • threat
        • 2.Qe5#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kd6!
    • 1.Sf6?
      • threat
        • 2.Qe5#
      • 1...Kxf6
        • 2.Qg5#
      • 1...Kd6!
    • 1.Sf8?
      • threat
        • 2.Qe5#
      • 1...Kf6
        • 2.Qe5#
        • 2.Qg5#
      • 1...Kd6!
    • 1.Rd8?
      • 1...Kd6
        • 2.Qc5#
      • 1...Kxd8!
  • Keys
    • 1.Sb8!
      • 1...Kd6
        • 2.Qe5#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Sc6#

Anticipated by 11611(1970)

This anticipates 86888(1997)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR2(C)
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR2(C)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);S_FLIGHT::R(E)+S(D)
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