MESON Chess Problem Database

Problem Display
PID: 227533 (8/1q6/3Np3/1p1NkpP1/1KnR4/2P5/8/8 w - - 0 1)

Falchetto, Attilo

Il Secolo, 1926

8/1q6/3Np3/1p1NkpP1/1KnR4/2P5/8/8

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Sf7#
    • 1...Qa6
      • 2.Sf7#
    • 1...Qc6
      • 2.Sf7#
    • 1...Qa8
      • 2.Sf7#
    • 1...Qc8
      • 2.Sf7#
    • 1...Qb6
      • 2.Sf7#
    • 1...Qf7
      • 2.Sxf7#
    • 1...Qb8
      • 2.Sf7#
  • Tries
    • 1.Se7?
      • threat
        • 2.Sf7#
        • 2.Sg6#
      • 1...Sxd6
        • 2.Sg6#
      • 1...Qe4
        • 2.Sg6#
      • 1...Qd5
        • 2.Sf7#
      • 1...Qxe7!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sd3#
        • 2.Sg6#
      • 1...Qe4
        • 2.Sg6#
      • 1...Qd5
        • 2.Sf7#
      • 1...Qf3
        • 2.Sg6#
        • 2.Sf7#
      • 1...Qf7
        • 2.Sd3#
        • 2.Sxf7#
      • 1...Qg7
        • 2.Sd3#
      • 1...Qh7
        • 2.Sd3#
      • 1...Sb2
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD,XS(D)::S(F)
    • Q(f);N_GUARD::S(F)
    • Q(f);N_GUARD::S(F),XQ(f)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XS(F)::S(D)
        • Q(f);::S(D)
        • Q(f);::S(F)
      • Refutation
        • Q(f);P_PINS(F),XS(D)
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • Q(f);::S(D)
      • Q(f);N_GUARD::S(F)
      • S(a);::S(D)
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