MESON Chess Problem Database

Problem Display
PID: 36948 (5nqr/8/6nr/1KBkP3/2Np2Qp/5P2/8/8 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

5th HM., Probleemblad, 1983

5nqr/8/6nr/1KBkP3/2Np2Qp/5P2/8/8

#2

6 + 8

3748 FIDE Album (1983-1985) 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Qxd4#
      • 2.Qe4#
    • 1...Se6
      • 2.Qe4#
    • 1...Sd7
      • 2.Qxd7#
    • 1...Sh7
      • 2.Qd7#
  • Tries
    • 1.Se3+?
      • 1...Kxe5
        • 2.Qf5#
      • 1...dxe3!
    • 1.Qf5?
      • threat
        • 2.Sb6#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Qe6
        • 2.Qe4#
      • 1...Sf4
        • 2.e6#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Se7!
  • Keys
    • 1.e6!
      • threat
        • 2.Qe4#
      • 1...Qxe6
        • 2.Qxd4#
      • 1...Sf4
        • 2.Qf5#
      • 1...Se5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(f);SBLOCK::QAB1(C)
    • S(f);N_GUARD::QAR2(C),XS(f)
    • S(f);N_GUARD::QAR2(C)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(F)::QAR1(C)
      • Refutation
        • P(a);XS(B)
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • S(d);OGATE,P_SPINS(d),XP(F)::QAR1(C),XS(d)
        • Q(g);SBLOCK::QAB1(C)
        • S(d);N_GUARD::QAR(C)+P(F)
        • S(f);N_GUARD::QAR2(C),XS(f)
      • Refutation
        • S(d);
  • Actual
    • P(F);
    • Threat
      • QAB1(C)
    • Vars
      • Q(g);SBLOCK,XP(F)::QAR1(C),XP(a)
      • S(d);N_GUARD::QAR2(C)
      • S(d);SBLOCK::S(B)
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