MESON Chess Problem Database

Problem Display
PID: 121722 (4b2q/5NB1/r3nQn1/1p3p1p/3P1k1P/1R3p1P/5N2/2bK2R1 w - - 0 1)

Stocchi, Ottavio

Sinfonie Scacchistiche, 1966

4b2q/5NB1/r3nQn1/1p3p1p/3P1k1P/1R3p1P/5N2/2bK2R1

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd4
      • 2.Qxd4#
      • 2.Qg5#
    • 1...Sc5
      • 2.Qg5#
    • 1...Sg5
      • 2.Qxg5#
    • 1...Sc7
      • 2.Qg5#
    • 1...Sxg7
      • 2.Qg5#
    • 1...Sd8
      • 2.Qg5#
    • 1...Sef8
      • 2.Qg5#
    • 1...Sxh4
      • 2.Qxh4#
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Se7
      • 2.Qe5#
    • 1...Sgf8
      • 2.Qe5#
  • Tries
    • 1.Sd3+?
      • 1...Ke3
        • 2.Re1#
      • 1...Ke4!
    • 1.Se5?
      • threat
        • 2.Rxf3#
      • 1...Sxd4
        • 2.Qg5#
      • 1...Sxh4
        • 2.Qxh4#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Be3
        • 2.Sed3#
      • 1...Bc6
        • 2.Sxg6#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Ra3!
    • 1.Bh6+?
      • 1...Sg5
        • 2.Bxg5#
        • 2.Qxg5#
      • 1...Qxh6!
    • 1.Rg5?
      • threat
        • 2.Qxf5#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Sxg5
        • 2.Qxg5#
      • 1...Sxh4
        • 2.Qe5#
      • 1...Se7
        • 2.Qe5#
      • 1...Sxg7!
    • 1.Qxe6?
      • threat
        • 2.Sd3#
      • 1...Se5
        • 2.Qxe5#
      • 1...Rxe6!
    • 1.Qxg6?
      • threat
        • 2.Qg3#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Qxg7!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Rxf3#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Sxg5
        • 2.Qxg5#
      • 1...Sxh4
        • 2.Qe5#
      • 1...Ra3
        • 2.Sxe6#
      • 1...Be3
        • 2.Sd3#
      • 1...Bc6
        • 2.Sxe6#
      • 1...Se5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • S(h);N_GUARD::QAB1(H)
    • S(h);N_GUARD::QAB1(H),XS(h)
    • S(h);N_GUARD,XB(J)::QAB1(H)
    • S(i);N_GUARD::QAB1(H),XS(i)
    • S(i);N_GUARD::QAB1(H)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);N_SPINP(e),S_FLIGHT::R(B)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT
    • Try
      • S(I);
      • Threat
        • R1(D),XP(b)
      • Vars
        • S(h);N_GUARD,XP(F)::QAB1(H)
        • S(i);OGATE,XP(G)::QAR2(H),XS(i)
        • S(i);OGATE,XS(I)::QAB1(H),XS(i)
        • B(a);SBLOCK::S(I)
        • B(j);N_GUARD::S(I),XS(i)
        • S(h);N_GUARD::QAB1(H),XS(h)
      • Refutation
        • R(g);
    • Try
      • B(J);CHECK
      • Refutation
        • Q(k);XB(J)
    • Try
      • R(B);
      • Threat
        • QAR1(H),XP(e)
      • Vars
        • S(h);OGATE,XP(F)::QAR2(H),XS(h)
        • S(h);OGATE,XR(B)::QAB1(H),XS(h)
        • S(i);N_GUARD,XP(G)::QAB1(H)
        • S(i);N_GUARD::QAB1(H)
      • Refutation
        • S(h);XB(J)
    • Try
      • Q(H);N_PINP(e),XS(h)
      • Threat
        • S(C)
      • Vars
        • S(i);N_GUARD::QAB1(H),XS(i)
      • Refutation
        • R(g);XQ(H)
    • Try
      • Q(H);N_PINP(e),XS(i)
      • Threat
        • QAB1(H)
      • Vars
        • S(h);N_GUARD::QAB1(H),XS(h)
      • Refutation
        • Q(k);XB(J)
  • Actual
    • S(I);
    • Threat
      • R1(D),XP(b)
    • Vars
      • S(h);OGATE,XP(F)::QAR2(H),XS(h)
      • S(h);OGATE,XS(I)::QAB1(H),XS(h)
      • S(i);N_GUARD,XP(G)::QAB1(H)
      • R(g);N_GUARD::S(I),XS(h)
      • B(a);SBLOCK::S(C)
      • B(j);S_CUTR(g)::S(I),XS(h)
      • S(i);N_GUARD::QAB1(H),XS(i)
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