MESON Chess Problem Database

Problem Display
PID: 28154 (1R2B1k1/3n1pN1/3B4/2p1Q2R/8/5p1K/1qp5/b7 w - - 0 1)

Stocchi, Ottavio

Citation, Het Schaakleven, 1934

1R2B1k1/3n1pN1/3B4/2p1Q2R/8/5p1K/1qp5/b7

#2

7 + 8

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Bxd7#
    • 1...Qa3
      • 2.Bxd7#
    • 1...Qc3
      • 2.Bxd7#
    • 1...Qd4
      • 2.Bxd7#
    • 1...Qa2
      • 2.Bxd7#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qh7#
        • 2.Qxf7#
      • 1...Kxg7
        • 2.Qg5#
        • 2.Qxf7#
      • 1...Qxg7
        • 2.Bxf7#
      • 1...Qf6
        • 2.Qh7#
      • 1...Qa2
        • 2.Qh7#
      • 1...Qb3
        • 2.Qh7#
      • 1...Se5
        • 2.Qh7#
      • 1...Sf8
        • 2.Qxf7#
      • 1...f6
        • 2.Qh7#
      • 1...Sf6!
  • Keys
    • 1.Se6!
      • threat
        • 2.Rh8#
      • 1...Qxe5
        • 2.Bxd7#
      • 1...Sxe5
        • 2.Bb5#
      • 1...Sf6
        • 2.Qg5#
      • 1...f6
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD::R(F)+B(G),XS(f)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);SBLOCK,XS(E)::R(F)+B(G),DCHECK,XP(g)
        • Q(b);::QAB1(B)
        • S(f);::QAB1(B)
        • S(f);::QAB1(B),XP(g)
        • P(g);::QAB1(B)
      • Refutation
        • S(f);
  • Actual
    • S(E);
    • Threat
      • R1(C)
    • Vars
      • Q(b);N_GUARD,XQ(B)::R(F)+B(G),XS(f)
      • S(f);OGATE,XQ(B)::R(F)+B(G)
      • S(f);S_CUTQ(b)::QAR(B)
      • P(g);S_CUTQ(b)::QAR(B)
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