MESON Chess Problem Database

Problem Display
PID: 28091 (1rkqN2R/3p3R/np4Np/5Kp1/6Q1/8/7B/7B w - - 0 1)

Stocchi, Ottavio

4th HM., Isaev-100 MT, 1933

1rkqN2R/3p3R/np4Np/5Kp1/6Q1/8/7B/7B

#2

8 + 8

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6+
      • 2.Sxf6#
    • 1...Qc7
      • 2.Sd6#
      • 2.Sxc7#
    • 1...Qxe8
      • 2.Rxe8#
    • 1...Sc7
      • 2.Sd6#
    • 1...d5
      • 2.Sd6#
    • 1...d6
      • 2.Sxd6#
  • Tries
    • 1.Qc4+?
      • 1...Qc7
        • 2.Sd6#
        • 2.Sf6#
        • 2.Sxc7#
        • 2.Sg7#
      • 1...Sc7
        • 2.Sd6#
      • 1...Sc5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Se7#
      • 1...Qxh8
        • 2.Rxh8#
      • 1...Qe8
        • 2.Rxe8#
      • 1...Qf8
        • 2.Rxf8#
      • 1...Qg8
        • 2.Rxg8#
      • 1...d5
        • 2.Ke5#
      • 1...d6
        • 2.Ke4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(h);CHECK::R(H)+S(G),XQ(h)
    • Q(h);OGATE,P_SPINQ(h),XS(G)::R(H),XQ(h)
    • S(b);SBLOCK::S(G)
    • P(e);::S(G)
    • P(e);::S(G),XP(e)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);P_SPINS(b)::S(G)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • S(G);P_PINQ(h)
    • Threat
      • S(E)
    • Vars
      • Q(h);N_SPINQ(h),OGATE,XR(H)::R(F),XQ(h)
      • Q(h);OGATEB::R(H),XQ(h)
      • Q(h);OGATEB,P_PINS(G)::R(H),XQ(h)
      • P(e);::QAB(C)+K(D)
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