MESON Chess Problem Database

Problem Display
PID: 29929 (3N1n1r/5R2/2n2P1p/2P1k1qQ/6p1/2PPNpK1/5PbB/4R3 w - - 0 1)

Stocchi, Ottavio

5th Prize, Parallele 50 03. TT, 1948

3N1n1r/5R2/2n2P1p/2P1k1qQ/6p1/2PPNpK1/5PbB/4R3

#2

12 + 9

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qxf5#
    • 1...Se6
      • 2.Sxc6#
  • Tries
    • 1.Sxg2+?
      • 1...Kf5
        • 2.Sh4#
      • 1...Kd5!
    • 1.Sc4+?
      • 1...Kf5
        • 2.Sd6#
      • 1...Kd5!
    • 1.Re7+?
      • 1...Kxf6
        • 2.Qf7#
      • 1...Se6
        • 2.Rxe6#
      • 1...Sxe7!
  • Keys
    • 1.Qxg4!
      • threat
        • 2.Sxc6#
      • 1...Qf4+
        • 2.Qxf4#
      • 1...Qh4+
        • 2.Kxh4#
      • 1...Qxg4+
        • 2.Kxg4#
      • 1...Qxe3
        • 2.Qh5#
      • 1...Qxf6
        • 2.Qe4#
      • 1...Sxd8
        • 2.d4#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Sb4
        • 2.d4#
      • 1...Sd4
        • 2.cxd4#
      • 1...Sa5
        • 2.d4#
      • 1...Sa7
        • 2.d4#
      • 1...Se7
        • 2.d4#
      • 1...Sb8
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 1
  • Sets
    • Q(e);OGATE::QAR1(I),XQ(e)
    • S(h);SBLOCK::S(L),XS(f)
  • Tries
    • Try
      • S(F);CHECK,XB(a)
      • Vars
        • K(d);P-FLIGHT::S(F)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(d);P-FLIGHT::S(F)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(K);CHECK
      • Vars
        • K(d);N_SPINQ(e),S_FLIGHT,XP(J)::QAR1(I)
        • S(h);N_GUARD,P_SPINS(h)::R1(K),XS(h)
      • Refutation
        • S(f);XR(K)
  • Actual
    • Q(I);N_PINQ(e),P_SPINQ(I),XP(c)
    • Threat
      • S(L),XS(f)
    • Vars
      • Q(e);CHECK,N_PINQ(I)::QAB1(I),XQ(e)
      • Q(e);CHECK,N_PINQ(I)::B(C)+K(G),XQ(e)
      • Q(e);CHECK,XQ(I)::B(C)+K(G),XQ(e)
      • Q(e);N_PINQ(I),P_SPINQ(e),XS(F)::QAR(I)
      • Q(e);N_PINQ(I),XP(J)::QAR1(I)
      • S(f);N_GUARD,XS(L)::P(E)
      • Q(e);N_PINQ(I)::QAR1(I),XQ(e)
      • S(f);N_GUARD::P(E)
      • S(f);OGATE::P(D),XS(f)
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