MESON Chess Problem Database

Problem Display
PID: 95714 (8/3r1P2/3p2K1/1N1pP3/2P1k1N1/Q1ppPp2/5P2/q7 w - - 0 1)

Simoni, Francesco

3rd Prize, L'Italia Scacchistica, 1984

8/3r1P2/3p2K1/1N1pP3/2P1k1N1/Q1ppPp2/5P2/q7

#2

9 + 8

35 L'Italia Scacchistica 1985
14744 Nuova Antologia dei Problemisti Italiani 1992
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sxc3#
    • 1...Qd1
      • 2.Sxc3#
    • 1...Qf1
      • 2.Sxc3#
    • 1...Qg1
      • 2.Sxc3#
    • 1...Qh1
      • 2.Sxc3#
    • 1...Qa2
      • 2.Sxc3#
    • 1...Ra7
      • 2.Sxd6#
    • 1...Rb7
      • 2.Sxd6#
    • 1...Rc7
      • 2.Sxd6#
    • 1...Re7
      • 2.Sxd6#
    • 1...Rxf7
      • 2.Sxd6#
    • 1...dxe5
      • 2.Sf6#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qd4#
        • 2.Qxd5#
      • 1...dxc4
        • 2.Sf6#
        • 2.Qd4#
        • 2.Qxc4#
      • 1...dxe5
        • 2.Sf6#
      • 1...Qa7
        • 2.Sxc3#
        • 2.Qxd5#
      • 1...Qa8
        • 2.Sxc3#
        • 2.Qd4#
      • 1...c2
        • 2.Qxd5#
      • 1...d4
        • 2.Sf6#
        • 2.Qxd4#
        • 2.Qd5#
      • 1...dxc5!
    • 1.Qxd6?
      • threat
        • 2.Sf6#
      • 1...Rxd6+
        • 2.Sxd6#
      • 1...Rxf7
        • 2.Qxd5#
      • 1...Qg1
        • 2.Sxc3#
      • 1...d2!
    • 1.Qxc3?
      • threat
        • 2.Sf6#
      • 1...Qxc3
        • 2.Sxc3#
      • 1...Rxf7
        • 2.Sxd6#
      • 1...Qg1
        • 2.Qd4#
      • 1...d4!
    • 1.Qa7?
      • threat
        • 2.Qd4#
      • 1...Qxa7
        • 2.Sxc3#
      • 1...Rxa7
        • 2.Sxd6#
      • 1...dxe5
        • 2.Sf6#
      • 1...d4
        • 2.Qxd4#
      • 1...c2!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qxd5#
      • 1...Qxa8
        • 2.Sxc3#
      • 1...dxe5
        • 2.Sf6#
      • 1...Rb7
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(a);N_GUARD::S(F),XP(b)
    • Q(a);N_GUARD,P_PINS(E)::S(F),XP(b)
    • R(h);N_GUARD::S(F),XP(g)
    • R(h);N_GUARD,XP(I)::S(F),XP(g)
    • P(g);SBLOCK,XP(G)::S(E)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);SBLOCK,XP(G)::S(E)
        • P(b);::QAB1(B),XP(f)
      • Refutation
        • P(g);XQ(B)
    • Try
      • Q(B);XP(g)
      • Threat
        • S(E)
      • Vars
        • R(h);CHECK,XQ(B)::S(F),XR(h)
        • R(h);N_GUARD,XP(I)::QAB1(B),XP(f)
        • Q(a);N_GUARD,P_PINS(E)::S(F),XP(b)
      • Refutation
        • P(c);
    • Try
      • Q(B);XP(b)
      • Threat
        • S(E)
      • Vars
        • Q(a);XQ(B)::S(F),XQ(a)
        • R(h);N_GUARD,XP(I)::S(F),XP(g)
        • Q(a);N_GUARD,P_PINS(E)::QAR1(B)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • Q(a);N_GUARD,XQ(B)::S(F),XP(b)
        • R(h);N_GUARD,XQ(B)::S(F),XP(g)
        • P(g);SBLOCK,XP(G)::S(E)
        • P(f);::QAR1(B),XP(f)
      • Refutation
        • P(b);
  • Actual
    • Q(B);P_PINP(f)
    • Threat
      • QAB1(B),XP(f)
    • Vars
      • Q(a);N_GUARD,N_SPINP(f),XQ(B)::S(F),XP(b)
      • P(g);SBLOCK,XP(G)::S(E)
      • R(h);N_GUARD,N_SPINP(f)::S(F),XP(g)
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