MESON Chess Problem Database

Problem Display
PID: 30089 (Q5b1/1r3nq1/pp6/RN1kPB2/3N2nr/2RP4/KB6/8 w - - 0 1)

Stocchi, Ottavio

El Ajedrez Espanol, 1948

Q5b1/1r3nq1/pp6/RN1kPB2/3N2nr/2RP4/KB6/8

#2

10 + 9

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Qxb7#
    • 1...Sgxe5
      • 2.Be6#
    • 1...Sfxe5
      • 2.Be4#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Sc7#
      • 1...Qxe5
        • 2.Sb4#
      • 1...Sgxe5
        • 2.Se7#
      • 1...Sfxe5
        • 2.Sb4#
      • 1...axb5
        • 2.Rxb5#
      • 1...Rc7
        • 2.Sxc7#
      • 1...bxa5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sbc7#
      • 1...Kxe5
        • 2.Rc5#
      • 1...Qxe5
        • 2.Qxb7#
      • 1...Sgxe5
        • 2.Sec7#
      • 1...Sfxe5
        • 2.Sf4#
      • 1...axb5
        • 2.Rxb5#
      • 1...bxa5
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(h);SBLOCK,XP(H)::QAB(J),XR(f)
    • S(a);SBLOCK,XP(H)::B(I)
    • S(g);SBLOCK,XP(H)::B(I)
  • Tries
    • Try
      • S(E);N_PINR(f)
      • Threat
        • R(F)+S(G),DCHECK
      • Vars
        • Q(h);SBLOCK,XP(H)::S(E)
        • S(a);SBLOCK,XP(H)::S(E)
        • S(g);SBLOCK,XP(H)::S(E)
        • P(d);OGATE,P_SPINP(d),XS(G)::R(F),XP(d)
        • R(f);::R(F)+S(G),DCHECK,XR(f)
      • Refutation
        • P(e);XR(F)
  • Actual
    • S(E);
    • Threat
      • R(F)+S(G),DCHECK
    • Vars
      • K(c);N_SPINR(f),P-FLIGHT,XP(H)::B(B)+R(C),DCHECK
      • Q(h);SBLOCK,XP(H)::QAB(J),XR(f)
      • S(a);SBLOCK,XP(H)::S(E)
      • S(g);SBLOCK,XP(H)::S(E)
      • P(d);OGATE,P_SPINP(d),XS(G)::R(F),XP(d)
      • P(e);N_GUARD,XR(F)::R1(C)
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