MESON Chess Problem Database

Problem Display
PID: 67299 (1b1r4/2Q1n1N1/3qRBR1/1n6/5k1P/5N1r/5P1P/3b2KB w - - 0 1)

Stocchi, Ottavio

2nd HM., Il Due Mosse, 1954

1b1r4/2Q1n1N1/3qRBR1/1n6/5k1P/5N1r/5P1P/3b2KB

#2

11 + 8

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3+
      • 2.fxg3#
      • 2.hxg3#
    • 1...Sd4
      • 2.Qc1#
    • 1...Sf5
      • 2.Sh5#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Re4#
      • 1...Rg3+
        • 2.fxg3#
        • 2.hxg3#
      • 1...Bc2
        • 2.Se2#
        • 2.Sh5#
      • 1...Qe5
        • 2.Bxe5#
      • 1...Re3
        • 2.fxe3#
      • 1...Rf3
        • 2.Sh5#
      • 1...Bf3
        • 2.Qc1#
      • 1...Sc3!
    • 1.Qc4+?
      • 1...Sd4
        • 2.Qc1#
      • 1...Qd4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Bg5#
      • 1...Rg3+
        • 2.hxg3#
      • 1...Qxe5
        • 2.Bxe5#
      • 1...Rf3
        • 2.Rg4#
      • 1...Bf3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(d);::QAB(J)
    • S(f);SBLOCK::S(K)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(G)
      • Vars
        • Q(e);N_GUARD::B(H),XQ(e)
        • R(b);OGATE::P(C),XR(b)
        • R(b);S_CUTB(a)::S(K)
        • B(a);S_CUTR(b)::QAB(J)
      • Refutation
        • S(d);
    • Try
      • Q(J);CHECK,N_PINQ(e)
      • Vars
        • S(d);P_SPINS(d),S_CUTQ(e)::QAB(J)
      • Refutation
        • Q(e);P_PINP(C),P_SPINQ(e)
  • Actual
    • S(E);N_PINQ(e)
    • Threat
      • B(H)
    • Vars
      • R(b);CHECK,OGATE::P(D),XR(b)
      • Q(e);OGATE,P_SPINQ(e),XS(E)::B(H),XQ(e)
      • R(b);S_CUTB(a)::R1(I)
      • B(a);S_CUTR(b)::S(E)
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