MESON Chess Problem Database

Problem Display
PID: 158260 (Q7/8/5p2/1N1P3N/3PkP2/1b6/3Kn1P1/8 w - - 0 1)

Lukashev, Viktor Sergeevich

Best Problems, 2009

Q7/8/5p2/1N1P3N/3PkP2/1b6/3Kn1P1/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd4
      • 2.Sd6#
    • 1...Sxf4
      • 2.Sg3#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Qe6#
      • 1...Bxd5
        • 2.Qc2#
      • 1...Sxd4
        • 2.Sd6#
      • 1...Sxf4
        • 2.Sg3#
      • 1...Kf5!
    • 1.Qg8?
      • threat
        • 2.Qe6#
      • 1...Kf5
        • 2.Sd6#
      • 1...Sxd4
        • 2.Sd6#
      • 1...Sxf4
        • 2.Sg3#
      • 1...Bxd5!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qe6#
      • 1...Kxd5
        • 2.Sxf6#
      • 1...Bxd5
        • 2.Qc2#
      • 1...Sxd4
        • 2.Sc3#
      • 1...Sxf4
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK,XP(C)::S(E)
    • S(a);N_GUARD,SBLOCK,XP(D)::S(G)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR2(H)
      • Vars
        • B(b);N_GUARD,P_SPINB(b),SBLOCK,XP(F)::QAB(H)
        • S(a);SBLOCK,XP(C)::S(E)
        • S(a);N_GUARD,SBLOCK,XP(D)::S(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • QAR2(H)
      • Vars
        • K(c);S_FLIGHT::S(E)
        • S(a);SBLOCK,XP(C)::S(E)
        • S(a);N_GUARD,SBLOCK,XP(D)::S(G)
      • Refutation
        • B(b);XP(F)
  • Actual
    • Q(H);
    • Threat
      • QAR2(H)
    • Vars
      • K(c);S_FLIGHT,XP(F)::S(G),XP(d)
      • B(b);N_GUARD,SBLOCK,XP(F)::QAB(H)
      • S(a);N_GUARD,SBLOCK,XP(C)::S(E)
      • S(a);SBLOCK,XP(D)::S(G),XP(d)
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