MESON Chess Problem Database

Problem Display
PID: 93490 (8/2K1QBp1/4N3/8/2Npk3/2p3p1/2p2pp1/1br2rb1 w - - 0 1)

Lobusov, Andrey Jakovlevic

Shakhmaty v SSSR, 1975

8/2K1QBp1/4N3/8/2Npk3/2p3p1/2p2pp1/1br2rb1

#2

5 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sf4#
      • 2.Sc5#
    • 1...Kd5
      • 2.Sf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sxg7#
      • 2.Sd8#
      • 2.Sf8#
  • Tries
    • 1.Qh4+?
      • 1...Kf3
        • 2.Sxd4#
        • 2.Bh5#
      • 1...Kd5
        • 2.Qxd4#
      • 1...Kf5
        • 2.Sxd4#
        • 2.Sxg7#
        • 2.Qf4#
      • 1...Kd3!
  • Keys
    • 1.Sxd4+!
      • 1...Kd3
        • 2.Qe3#
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kf4
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(k);OGATE,S_FLIGHT::QAR1(D),XP(j)
      • Refutation
        • K(k);S_FLIGHT
  • Actual
    • S(B);CHECK,XP(j)
    • Vars
      • K(k);OGATE,S_FLIGHT::QAR1(D)
      • K(k);OGATE,P-FLIGHT,XS(B)::QAB1(D)
      • K(k);P-FLIGHT::QAR2(D)
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