MESON Chess Problem Database

Problem Display
PID: 67067 (8/p1Q1p3/2pnb1r1/r2k2qR/N3p3/1P2P3/p5NB/K7 w - - 0 1)

Stocchi, Ottavio

El Ajedrez Espanol, 1954

8/p1Q1p3/2pnb1r1/r2k2qR/N3p3/1P2P3/p5NB/K7

#2

8 + 11

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Rxe5#
    • 1...Sc4
      • 2.Sf4#
    • 1...Sb5
      • 2.Sf4#
    • 1...Sf5
      • 2.Qe5#
    • 1...Sb7
      • 2.Sf4#
    • 1...Sf7
      • 2.Sf4#
    • 1...Sc8
      • 2.Sf4#
    • 1...Se8
      • 2.Sf4#
    • 1...c5
      • 2.Sc3#
  • Tries
    • 1.Qxa5+?
      • 1...c5
        • 2.Qxc5#
      • 1...Sb5!
  • Keys
    • 1.Qxe7!
      • threat
        • 2.Qxd6#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...Bh3
        • 2.Sf4#
      • 1...Bg4
        • 2.Sf4#
      • 1...Bf5
        • 2.Qe5#
      • 1...Bd7
        • 2.Sf4#
      • 1...Bf7
        • 2.Sf4#
      • 1...Bc8
        • 2.Sf4#
      • 1...Bg8
        • 2.Sf4#
      • 1...Sc4
        • 2.Sc3#
      • 1...Sb5
        • 2.Qc5#
      • 1...Sf5
        • 2.Sc3#
      • 1...Sb7
        • 2.Sc3#
      • 1...Sf7
        • 2.Sc3#
      • 1...Sc8
        • 2.Sc3#
      • 1...Se8
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 7
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • Q(e);CHECK,OGATE::R1(G),XQ(e)
    • S(g);::S(B)
    • S(g);N_SPINQ(e),OGATE::QAR1(H)
    • P(f);::S(F)
  • Tries
    • Try
      • Q(H);CHECK,XR(c)
      • Vars
        • P(f);P_SPINP(f)::QAR1(H),XP(f)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • Q(H);XP(k)
    • Threat
      • QAR1(H),XS(g)
    • Vars
      • Q(e);CHECK,OGATE::R1(G),XQ(e)
      • B(h);::S(B)
      • B(h);N_SPINQ(e),OGATE::QAR1(H)
      • S(g);::S(F)
      • S(g);OGATE::QAR1(H)
      • S(g);N_SPINQ(e)::S(F)
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