MESON Chess Problem Database

Problem Display
PID: 86888 (R7/3Nk3/7P/1Q6/5K2/8/B7/8 w - - 0 1)

Kovalenko, Boris

Vecherni Magadan, 1997

R7/3Nk3/7P/1Q6/5K2/8/B7/8

#2

6 + 1

5454 Near Snap 2009
6490 yacpdb 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), 132771(1996)

FEATURES

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