MESON Chess Problem Database

Problem Display
PID: 28320 (4N3/KNp1pn1r/2P1kBp1/2Qn2bp/1p3pP1/2p1Pr1B/4Rq2/7b w - - 0 1)

Stocchi, Ottavio

2nd HM., Il Problema (2. Changed Mates TT), 1934

4N3/KNp1pn1r/2P1kBp1/2Qn2bp/1p3pP1/2p1Pr1B/4Rq2/7b

#2

10 + 15

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.gxh5#
    • 1...Sxe3
      • 2.Qc4#
    • 1...Sxf6
      • 2.Sxc7#
    • 1...Se5
      • 2.Sd8#
    • 1...Sd6
      • 2.Sd8#
    • 1...Sh6
      • 2.Sd8#
    • 1...Sd8
      • 2.Sxd8#
    • 1...Sh8
      • 2.Sd8#
    • 1...hxg4
      • 2.Bxg4#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Sc5#
      • 1...hxg4
        • 2.Bxg4#
      • 1...Se5
        • 2.Sd8#
      • 1...Sd6
        • 2.Sd8#
      • 1...Sh6
        • 2.Sd8#
      • 1...Sd8
        • 2.Sxd8#
      • 1...Sh8
        • 2.Sd8#
      • 1...exf6!
  • Keys
    • 1.e4!
      • threat
        • 2.exd5#
      • 1...Qxc5+
        • 2.Sxc5#
      • 1...Sxf6
        • 2.Sxc7#
      • 1...hxg4
        • 2.Bxg4#
      • 1...Se5
        • 2.Sd8#
      • 1...Sd6
        • 2.Sd8#
      • 1...Sh6
        • 2.Sd8#
      • 1...Sd8
        • 2.Sxd8#
      • 1...Sh8
        • 2.Sd8#
      • 1...Re3
        • 2.Qxd5#
      • 1...Se3
        • 2.Qxe7#
      • 1...Sb6
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD,P_SPINR(d),XP(B)::B(C)+P(D),XP(i)
    • S(g);OGATEB,P_SPINS(g),XP(B)::QAB(E)
    • S(g);N_GUARD,SBLOCK,XB(G)::S(J),XP(l)
    • S(n);N_GUARD::S(I)
    • S(n);N_GUARD::S(I),XS(n)
    • P(i);OGATE,P_SPINP(i),XP(D)::B(C),XP(i)
  • Tries
    • Try
      • Q(E);
      • Threat
        • S(I)
      • Vars
        • P(i);OGATE,P_SPINP(i),XP(D)::B(C),XP(i)
        • S(n);N_GUARD::S(I)
        • S(n);N_GUARD::S(I),XS(n)
      • Refutation
        • P(m);XB(G)
  • Actual
    • P(B);P_SPINQ(E)
    • Threat
      • R(A)+P(B)DCHECK,XS(g)
    • Vars
      • Q(b);CHECK,XQ(E)::S(I),XQ(b)
      • S(g);N_GUARD,SBLOCK,XB(G)::S(J),XP(l)
      • P(i);OGATE,P_SPINP(i),XP(D)::B(C),XP(i)
      • S(n);N_GUARD::S(I)
      • S(n);N_GUARD::S(I),XS(n)
      • R(d);N_PINQ(E)::QAB1(E),XS(g)
      • S(g);N_PINQ(E)::QAR1(E),XP(m)
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