MESON Chess Problem Database

Problem Display
PID: 23727 (8/2B2QKN/2p3p1/q2Rpp2/1np1kNP1/7P/2PP1prb/3Bn3 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Die Schwalbe, 1996

8/2B2QKN/2p3p1/q2Rpp2/1np1kNP1/7P/2PP1prb/3Bn3

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf4
      • 2.Sf6#
    • 1...exf4
      • 2.Sg5#
      • 2.Sf6#
      • 2.Qe6#
    • 1...fxg4
      • 2.Sg5#
    • 1...g5
      • 2.Qxf5#
  • Tries
    • 1.Se2?
      • threat
        • 2.Sg5#
      • 1...Kf3
        • 2.Sg5#
      • 1...Bf4
        • 2.Sc3#
      • 1...Sf3
        • 2.Sf6#
      • 1...g5
        • 2.Sxg5#
      • 1...Rxg4!
    • 1.Rd4+?
      • 1...exd4
        • 2.Sg5#
        • 2.Sf6#
      • 1...Kxd4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sf6#
      • 1...Kxd5
        • 2.Sf6#
      • 1...Sxd5
        • 2.Shg5#
      • 1...fxg4
        • 2.Seg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(d);SBLOCK,XS(E)::S(K)
    • P(j);XP(F)::S(K)
    • P(l);N_GUARD::QAB1(I),XP(j)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(K)
      • Vars
        • K(g);P_SPINP(j),S_FLIGHT::S(K)
        • B(d);SBLOCK::S(E)
        • S(a);SBLOCK::S(K)
        • P(l);::S(K),XP(l)
      • Refutation
        • R(c);XP(F)
    • Try
      • R(G);CHECK
      • Refutation
        • K(g);P-FLIGHT,XR(G)
  • Actual
    • S(E);
    • Threat
      • S(K)
    • Vars
      • K(g);S_FLIGHT,XR(G)::S(K)
      • S(e);SBLOCK,XR(G)::S(K)
      • P(j);XP(F)::S(E)
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