MESON Chess Problem Database

Problem Display
PID: 133350 (7b/2pp3N/N2p1p2/pPPkp3/5p1Q/2PP3B/K7/5n1b w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

1/2 HM., Buletin Problemistic, 1983

7b/2pp3N/N2p1p2/pPPkp3/5p1Q/2PP3B/K7/5n1b

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Qc4#
      • 2.Qe4#
      • 2.c4#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Sxc7#
        • 2.c4#
      • 1...dxc5
        • 2.Qxc5#
      • 1...e4
        • 2.Qd4#
      • 1...f5
        • 2.Sxc7#
      • 1...Sd2
        • 2.Sxc7#
      • 1...c6
        • 2.Sc7#
        • 2.c4#
      • 1...Se3!
    • 1.Qg4?
      • threat
        • 2.Qg8#
      • 1...dxc5
        • 2.Qxd7#
      • 1...e4
        • 2.Qf5#
      • 1...Bg7!
  • Keys
    • 1.Qxf6!
      • threat
        • 2.Qf7#
      • 1...Bxf6
        • 2.Sxf6#
      • 1...dxc5
        • 2.Sxc7#
      • 1...e4
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);OGATE,XP(G)::QAR1(E),XP(g)
        • P(f);N_GUARD::QAR1(E)
        • P(h);::S(H),XP(i)
        • S(a);::S(H),XP(i)
      • Refutation
        • S(a);
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • P(g);OGATEB,XP(G)::QAR2(E),XP(j)
        • P(f);OGATEB::QAR2(E)
      • Refutation
        • B(k);
  • Actual
    • Q(E);XP(h)
    • Threat
      • QAB(E)
    • Vars
      • B(k);XQ(E)::S(I),XB(k)
      • P(g);SBLOCK,XP(G)::S(H),XP(i)
      • P(f);::P(B)
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