MESON Chess Problem Database

Problem Display
PID: 43484 (4b3/3p4/3P4/5p1Q/K1pNkbRn/5N1r/B4Pn1/B2R4 w - - 0 1)

Stocchi, Ottavio

2nd Prize, Problemisten, 1950/II

4b3/3p4/3P4/5p1Q/K1pNkbRn/5N1r/B4Pn1/B2R4

#2

10 + 9

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf3
      • 2.Qxf5#
    • 1...Sg6
      • 2.Qxf5#
    • 1...c3
      • 2.Qxe8#
    • 1...fxg4
      • 2.Bb1#
  • Tries
    • 1.Sg5+?
      • 1...Ke5
        • 2.Sdf3#
        • 2.Sc6#
      • 1...Kd5!
    • 1.Sb5?
      • threat
        • 2.Sg5#
      • 1...Rxf3
        • 2.Qxe8#
      • 1...Sxf3
        • 2.Bb1#
      • 1...fxg4
        • 2.Qd5#
      • 1...c3
        • 2.Bd5#
      • 1...Kxf3!
    • 1.Sc6?
      • threat
        • 2.Sg5#
      • 1...Rxf3
        • 2.Rd4#
        • 2.Qxe8#
      • 1...Sxf3
        • 2.Bb1#
      • 1...fxg4
        • 2.Qd5#
      • 1...Kxf3!
    • 1.Se6?
      • threat
        • 2.Sfg5#
        • 2.Seg5#
      • 1...Kxf3
        • 2.Rxf4#
      • 1...Rxf3
        • 2.Sc5#
        • 2.Sg5#
      • 1...Sxf3
        • 2.Sc5#
        • 2.Bb1#
      • 1...fxg4
        • 2.Qd5#
      • 1...c3
        • 2.Seg5#
        • 2.Bd5#
      • 1...dxe6+!
  • Keys
    • 1.Se2!
      • threat
        • 2.Sg5#
      • 1...Kxf3
        • 2.Rxf4#
      • 1...Rxf3
        • 2.Qxe8#
      • 1...Sxf3
        • 2.Bb1#
      • 1...fxg4
        • 2.Qd5#
      • 1...c3
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD,XS(E)::QAB1(I),XP(g)
    • S(f);N_GUARD::QAB1(I),XP(g)
    • P(c);::QAR(I),XB(i)
    • P(g);N_SPINB(e),XR(H)::B(C)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(d);N_SPINB(e),P_SPINP(c),S_FLIGHT
    • Try
      • S(G);
      • Threat
        • S(E)
      • Vars
        • R(b);SBLOCK,XS(E)::QAR(I),XB(i)
        • S(f);SBLOCK,XS(E)::B(C)
        • P(g);N_SPINB(e),OGATE,XR(H)::QAB1(I)
        • P(c);OGATE::B(C)
      • Refutation
        • K(d);N_SPINB(e),S_FLIGHT,XS(E)
    • Try
      • S(G);
      • Threat
        • S(E)
      • Vars
        • S(f);SBLOCK,XS(E)::B(C)
        • P(g);N_SPINB(e),OGATE,XR(H)::QAB1(I)
      • Refutation
        • K(d);N_SPINB(e),S_FLIGHT,XS(E)
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);N_SPINB(e),S_FLIGHT,XS(E)::QAB(I)+R(H),DCHECK,XB(e)
        • P(g);N_SPINB(e),OGATE,XR(H)::QAB1(I)
      • Refutation
        • P(h);CHECK,XS(G)
  • Actual
    • S(G);
    • Threat
      • S(E)
    • Vars
      • K(d);N_SPINB(e),S_FLIGHT,XS(E)::QAB(I)+R(H),DCHECK,XB(e)
      • R(b);SBLOCK,XS(E)::QAR(I),XB(i)
      • S(f);SBLOCK,XS(E)::B(C)
      • P(g);N_SPINB(e),OGATE,XR(H)::QAB1(I)
      • P(c);OGATE::B(C)
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