MESON Chess Problem Database

Problem Display
PID: 29878 (K3Q1nr/6Pk/2R5/5b1N/3b1r2/8/8/7R w - - 0 1)

Stocchi, Ottavio

4th HM., Chess Correspondent (Meredith Ty.), 1948

K3Q1nr/6Pk/2R5/5b1N/3b1r2/8/8/7R

#2

6 + 6

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg7
      • 2.Sf6#
    • 1...Bh3
      • 2.Qg6#
    • 1...Bg4
      • 2.Qg6#
    • 1...Bg6
      • 2.Qxg6#
    • 1...Bd7
      • 2.Qg6#
    • 1...Bc8
      • 2.Qg6#
    • 1...Sf6
      • 2.gxh8Q#
      • 2.gxh8R#
    • 1...Sh6
      • 2.Qxh8#
    • 1...Se7
      • 2.Qxh8#
  • Tries
    • 1.Sxf4+?
      • 1...Bh3
        • 2.Qg6#
      • 1...Sh6
        • 2.Qxh8#
      • 1...Kxg7!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Sf6#
      • 1...Sf6+
        • 2.g8S#
      • 1...Sh6+
        • 2.g8Q#
        • 2.g8B#
      • 1...Se7+
        • 2.g8Q#
        • 2.g8B#
      • 1...Bf6
        • 2.Sxf6#
      • 1...Rh4
        • 2.Qxf5#
      • 1...Bh3
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(a);SBLOCK,XP(D)::R(A)+S(B),DCHECK
    • B(c);N_GUARD::QAB1(F)
    • B(c);N_GUARD::QAB1(F),XB(c)
    • S(e);P_PINQ(F),S_CUTB(a)::PXR(f)=Q
    • S(e);OGATE,P_PINQ(F)::QAR1(F),XR(f)
  • Tries
    • Try
      • S(B);CHECK,XR(b)
      • Vars
        • B(c);P_SPINB(c)::QAB1(F)
        • S(e);OGATE,P_PINQ(F),P_SPINS(e)::QAR1(F),XR(f)
      • Refutation
        • K(d);P-FLIGHT,XP(D)
  • Actual
    • Q(F);
    • Threat
      • R(A)+S(B),DCHECK
    • Vars
      • S(e);CHECK,OGATE::P=S
      • S(e);CHECK,OGATE::P=Q
      • B(a);::R(A)+S(B),DCHECK,XB(a)
      • R(b);N_GUARD::QAB(F),XB(c)
      • B(c);N_GUARD::QAB1(F)
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