MESON Chess Problem Database

Problem Display
PID: 121679 (kN2q3/p1PP1PP1/2P3p1/7b/4B3/5p2/5K2/8 w - - 0 1)

Stocchi, Ottavio

El Diluvio, 1933

kN2q3/p1PP1PP1/2P3p1/7b/4B3/5p2/5K2/8

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd7
      • 2.cxd7#
  • Tries
    • 1.c8Q?
      • threat
        • 2.Qb7#
      • 1...Qxd7
        • 2.Sxd7#
        • 2.cxd7#
      • 1...Qxc8!
  • Keys
    • 1.Sa6!
      • threat
        • 2.dxe8Q#
        • 2.dxe8R#
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Qxd7
        • 2.cxd7#
      • 1...Qxf7
        • 2.c8Q#
        • 2.c8R#
        • 2.d8Q#
        • 2.d8R#
      • 1...Qxe4
        • 2.c8Q#
        • 2.c8R#
        • 2.d8Q#
        • 2.d8R#
      • 1...Qe5
        • 2.d8Q#
        • 2.d8R#
      • 1...Qe6
        • 2.c8Q#
        • 2.c8R#
      • 1...Qe7
        • 2.c8Q#
        • 2.c8R#
      • 1...Qb8
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Qc8
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qd8
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Qf8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Qg8
        • 2.fxg8Q#
        • 2.fxg8R#
      • 1...Qh8
        • 2.gxh8Q#
        • 2.gxh8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(f);OGATE,XP(E)::B(B)+P(C),XQ(f)
  • Tries
    • Try
      • P(D);
      • Threat
        • QAB1(D)
      • Refutation
        • Q(f);XQ(D)
  • Actual
    • S(H);
    • Threat
      • DUALS(4)
    • Vars
      • Q(f);OGATE,XP(E)::B(B)+P(C),XQ(f)
      • Q(f);N_GUARD::P=Q
      • Q(f);OGATE::PXQ(f)=Q
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