MESON Chess Problem Database

Problem Display
PID: 30461 (4K3/3p4/2pQ4/2P1nP1p/3Pp2N/p3kp1P/R2N1p1P/5B2 w - - 0 1)

Stocchi, Ottavio

Problemi di Ottavio Stocchi, 1995

4K3/3p4/2pQ4/2P1nP1p/3Pp2N/p3kp1P/R2N1p1P/5B2

#2

11 + 9

3100 Selected Stocchi (I) 2001
14475 Mat Plus Review 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qh6#
    • 1...Sd3
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sg4
      • 2.Sc4#
    • 1...Sg6
      • 2.Sc4#
    • 1...Sf7
      • 2.Sc4#
  • Tries
    • 1.Ke7?
      • 1...Kf4
        • 2.Qh6#
      • 1...Sd3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sg4
        • 2.Sc4#
      • 1...Sf7
        • 2.Sc4#
      • 1...Sg6+!
    • 1.Kd8?
      • 1...Kf4
        • 2.Qh6#
      • 1...Sd3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sg4
        • 2.Sc4#
      • 1...Sg6
        • 2.Sc4#
      • 1...Sf7+!
    • 1.Kf8?
      • 1...Kf4
        • 2.Qh6#
      • 1...Sd3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sg4
        • 2.Sc4#
      • 1...Sf7
        • 2.Sc4#
      • 1...Sg6+!
    • 1.Sc4+?
      • 1...Kf4
        • 2.Qh6#
      • 1...Sxc4!
    • 1.Sg6?
      • 1...Sxg6
        • 2.Sc4#
      • 1...Sd3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sg4
        • 2.Sc4#
      • 1...Sf7
        • 2.Sc4#
      • 1...h4!
    • 1.Rc2?
      • 1...Kf4
        • 2.Qh6#
      • 1...Sd3
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sg4
        • 2.Sc4#
      • 1...Sg6
        • 2.Sc4#
      • 1...Sf7
        • 2.Sc4#
      • 1...a2!
    • 1.Rxa3+?
      • 1...Kf4
        • 2.Qh6#
      • 1...Sd3
        • 2.Sc4#
      • 1...Kxd2!
    • 1.f6?
      • 1...Sd3
        • 2.Sc4#
        • 2.Sf5#
      • 1...Sc4
        • 2.Sxc4#
        • 2.Sf5#
      • 1...Sg4
        • 2.Sc4#
        • 2.Sf5#
      • 1...Sg6
        • 2.Sc4#
        • 2.Sf5#
      • 1...Sf7
        • 2.Sc4#
        • 2.Sf5#
      • 1...Kf4!
  • Keys
    • 1.Sdxf3!
      • threat
        • 2.Qh6#
      • 1...Kf4
        • 2.Qh6#
      • 1...Sxf3
        • 2.Sg2#
      • 1...exf3
        • 2.Qxe5#
      • 1...Sd3
        • 2.Re2#
      • 1...Sg4
        • 2.Rxa3#
      • 1...Sg6
        • 2.Rxa3#
      • 1...Sf7
        • 2.Rxa3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);P_SPINS(f),S_FLIGHT::QAB(J)
    • S(f);N_GUARD::S(C)
    • S(f);N_GUARD::S(C),XS(f)
  • Tries
    • Try
      • K(K);P-FLIGHT
      • Vars
        • K(c);P_SPINS(f),S_FLIGHT::QAB(J)
        • S(f);N_GUARD::S(C)
        • S(f);N_GUARD::S(C),XS(f)
      • Refutation
        • S(f);CHECK
    • Try
      • K(K);P-FLIGHT
      • Vars
        • K(c);P_SPINS(f),S_FLIGHT::QAB(J)
        • S(f);N_GUARD::S(C)
        • S(f);N_GUARD::S(C),XS(f)
      • Refutation
        • S(f);CHECK
    • Try
      • K(K);P-FLIGHT
      • Vars
        • K(c);P_SPINS(f),S_FLIGHT::QAB(J)
        • S(f);N_GUARD::S(C)
        • S(f);N_GUARD::S(C),XS(f)
      • Refutation
        • S(f);CHECK
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P_SPINS(f),S_FLIGHT::QAB(J)
      • Refutation
        • S(f);XS(C)
    • Try
      • S(G);
      • Vars
        • S(f);N_GUARD,XS(G)::S(C)
        • S(f);N_GUARD::S(C)
        • S(f);N_GUARD::S(C),XS(f)
      • Refutation
        • P(g);
    • Try
      • R(B);
      • Vars
        • K(c);P_SPINS(f),S_FLIGHT::QAB(J)
        • S(f);N_GUARD::S(C)
        • S(f);N_GUARD::S(C),XS(f)
      • Refutation
        • P(b);
    • Try
      • R(B);CHECK,XP(b)
      • Vars
        • K(c);P_SPINS(f),S_FLIGHT::QAB(J)
        • S(f);P_SPINS(f)::S(C)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • P(I);
      • Refutation
        • K(c);P_SPINS(f),S_FLIGHT
  • Actual
    • S(C);XP(d)
    • Threat
      • QAB(J)
    • Vars
      • K(c);P_SPINS(f),S_FLIGHT::QAB(J)
      • S(f);SBLOCK,XS(C)::S(G)
      • P(e);OGATEB,XS(C)::QAR2(J),XS(f)
      • S(f);SBLOCK::R1(B)
      • S(f);N_GUARD::R(B),XP(b)
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