MESON Chess Problem Database

Problem Display
PID: 29575 (8/6p1/4P1P1/2Np2QP/2pkN1BR/R1p5/5P2/2K2n2 w - - 0 1)

Stocchi, Ottavio

2nd HM., Le Probleme TT, 1947

8/6p1/4P1P1/2Np2QP/2pkN1BR/R1p5/5P2/2K2n2

#2

11 + 6

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

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.fxe3#
  • Tries
    • 1.Sxc3?
      • threat
        • 2.Qxd5#
      • 1...Se3
        • 2.Qxe3#
      • 1...Kxc5!
    • 1.Sb3+?
      • 1...Kd3
        • 2.Sec5#
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Be2#
        • 2.Qf5#
      • 1...cxb3!
    • 1.Sd7?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Be2#
      • 1...c2
        • 2.Qe5#
      • 1...Sd2
        • 2.Qe3#
      • 1...Sh2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sg3
        • 2.Qe3#
      • 1...dxe4!
    • 1.Qe3+?
      • 1...Ke5
        • 2.Sd7#
        • 2.f4#
      • 1...Sxe3!
    • 1.Qe7?
      • threat
        • 2.Qxg7#
      • 1...dxe4
        • 2.Qd6#
      • 1...Ke5!
  • Keys
    • 1.Sd3!
      • 1...Kxd3
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Be2#
      • 1...cxd3
        • 2.Ra4#
      • 1...dxe4
        • 2.Qd8#
      • 1...c2
        • 2.Qe5#
      • 1...Sd2
        • 2.Qe3#
      • 1...Sh2
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sg3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::P(B),XS(a)
  • Tries
    • Try
      • S(D);XP(b)
      • Threat
        • QAR1(H),XP(e)
      • Vars
        • S(a);N_GUARD::QAB1(H),XS(a)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT,XS(G)
    • Try
      • S(G);CHECK
      • Refutation
        • P(c);XS(G)
    • Try
      • S(G);
      • Vars
        • K(d);P-FLIGHT,P_SPINP(b)::QAR2(H),XP(e)
        • K(d);OGATEB,P-FLIGHT,XS(D)::R(F)+B(E)
        • P(b);::QAB1(H)
        • S(a);N_GUARD::QAB1(H)
        • S(a);N_GUARD::QAB1(H),XS(a)
      • Refutation
        • P(e);XS(D)
    • Try
      • Q(H);CHECK
      • Refutation
        • S(a);XQ(H)
    • Try
      • Q(H);
      • Threat
        • QAB(H),XP(f)
      • Vars
        • P(e);OGATEB,XS(D)::QAR2(H)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(G);
    • Vars
      • K(d);P-FLIGHT,P_SPINP(b),XS(G)::QAR2(H),XP(e)
      • K(d);OGATEB,P-FLIGHT,XS(D)::R(F)+B(E)
      • P(c);OGATEB,SBLOCK,XS(G)::R(C)
      • P(e);OGATEB,SBLOCK,XS(D)::QAR(H)
      • P(b);::QAB1(H)
      • S(a);N_GUARD::QAB1(H)
      • S(a);N_GUARD::QAB1(H),XS(a)
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