MESON Chess Problem Database

Problem Display
PID: 176000 (B7/1q6/n1n1p1Np/3k2pK/p2pN3/2pPP3/2Q5/8 w - - 0 1)

Ivanovsky, Nikolai Aleksandrovich

Probleemblad, 1978

B7/1q6/n1n1p1Np/3k2pK/p2pN3/2pPP3/2Q5/8

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa8
      • 2.Qa2#
    • 1...Qc8
      • 2.Qa2#
    • 1...Qa7
      • 2.Qa2#
    • 1...Qc7
      • 2.Qa2#
    • 1...Qd7
      • 2.Qa2#
    • 1...Qe7
      • 2.Qa2#
    • 1...Qf7
      • 2.Qa2#
    • 1...Qg7
      • 2.Qa2#
    • 1...Qh7
      • 2.Qa2#
    • 1...Se5
      • 2.Se7#
  • Tries
    • 1.Qh2?
      • threat
        • 2.Qd6#
      • 1...Se5
        • 2.Se7#
      • 1...Qb4
        • 2.Qe5#
      • 1...Qc7
        • 2.Qa2#
      • 1...Qd7
        • 2.Qe5#
        • 2.Qa2#
      • 1...Qe7
        • 2.Sxe7#
        • 2.Qe5#
        • 2.Qa2#
      • 1...Qb8
        • 2.Se7#
      • 1...e5!
  • Keys
    • 1.Qxa4!
      • threat
        • 2.Qc4#
      • 1...Qb3
        • 2.Bxc6#
        • 2.Qxb3#
        • 2.Qxc6#
        • 2.Qxd4#
      • 1...Qb4
        • 2.Bxc6#
        • 2.Qxc6#
      • 1...Qb5
        • 2.Qxd4#
      • 1...Sab4
        • 2.Qb3#
      • 1...Scb4
        • 2.Qd7#
      • 1...Sa5
        • 2.Qd7#
      • 1...Se5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(j);N_GUARD,XB(G)::QAB(A)
    • Q(j);N_GUARD,P_SPINS(g)::QAB(A)
    • Q(j);N_GUARD,P_PINS(F),P_SPINS(g)::QAB(A)
    • S(g);N_GUARD,P_SPINQ(j),SBLOCK::S(F)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(g);N_GUARD,P_SPINQ(j)::S(F)
        • Q(j);P_SPINS(g)::QAR1(A)
        • Q(j);N_GUARD,P_SPINS(g)::QAB(A)
        • Q(j);N_GUARD,P_SPINS(g)::S(F)
      • Refutation
        • P(h);
  • Actual
    • Q(A);XP(b)
    • Threat
      • QAB1(A)
    • Vars
      • Q(j);P_SPINS(g)::QAR1(A),XP(c)
      • S(f);S_CUTQ(j)::QAB(A)
      • S(g);OGATE,P_SPINQ(j)::QAR2(A)
      • S(g);N_GUARD,P_SPINQ(j),SBLOCK::S(F)
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Developed and maintained by Brian Stephenson.
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