MESON Chess Problem Database

Problem Display
PID: 28591 (b5K1/PknQ1p2/8/1n1P1N2/8/1Np5/2P3R1/R5BB w - - 0 1)

Stocchi, Ottavio

2nd Prize, Il Problema, 1934/II

b5K1/PknQ1p2/8/1n1P1N2/8/1Np5/2P3R1/R5BB

#2

11 + 6

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Sxd6#
  • Tries
    • 1.Ra6?
      • threat
        • 2.Sc5#
      • 1...Sxa7
        • 2.Rb6#
      • 1...Kxa6!
    • 1.Qxc7+?
      • 1...Sxc7
        • 2.Sd6#
      • 1...Kxc7!
    • 1.d6?
      • threat
        • 2.Rd2#
        • 2.Re2#
        • 2.Rh2#
        • 2.Rg3#
        • 2.Rg4#
        • 2.Rg5#
        • 2.Rg6#
        • 2.Rg7#
      • 1...Sxd6
        • 2.Sxd6#
      • 1...Sxa7
        • 2.Qxc7#
      • 1...Sd4
        • 2.Qxc7#
      • 1...Sa3!
  • Keys
    • 1.Rg6!
      • threat
        • 2.Sa5#
        • 2.Sc5#
        • 2.Rb6#
        • 2.d6#
      • 1...Sxa7
        • 2.Rb6#
      • 1...fxg6
        • 2.d6#
      • 1...Sa3
        • 2.Sa5#
      • 1...Sd4
        • 2.Sc5#
      • 1...Sd6
        • 2.Sxd6#
      • 1...f6
        • 2.d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::S(H),XS(b)
  • Tries
    • Try
      • R(A);
      • Threat
        • S(F)
      • Vars
        • S(b);SBLOCK,XP(I)::R1(A)
      • Refutation
        • K(c);N_SPINS(d),S_FLIGHT,XR(A)
    • Try
      • Q(J);CHECK,XS(d)
      • Vars
        • S(b);SBLOCK,XQ(J)::S(H)
      • Refutation
        • K(c);P-FLIGHT,XQ(J)
    • Try
      • P(G);
      • Threat
        • DUALS(8)
      • Vars
        • S(b);XP(G)::S(H),XS(b)
        • S(b);N_GUARD,XP(I)::QAR1(J),XS(d)
        • S(b);N_GUARD::QAR1(J),XS(d)
      • Refutation
        • S(b);
  • Actual
    • R(E);
    • Threat
      • DUALS(4)
    • Vars
      • S(b);XP(I)::R1(E)
      • P(e);XR(E)::B(C)+P(G)
      • S(b);::S(F)
      • S(b);N_GUARD::S(H),XS(b)
      • P(e);::B(C)+P(G)
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