MESON Chess Problem Database

Problem Display
PID: 44787 (5B2/3q4/1p1NP1p1/5P2/1PBkNP2/6R1/1P2R3/2n1nK2 w - - 0 1)

Zeller, Jean

1st Place, Match: France - Israel, 1966

5B2/3q4/1p1NP1p1/5P2/1PBkNP2/6R1/1P2R3/2n1nK2

#2

12 + 6

56 The Problemist 2002
133 The Problemist Supplement 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Bg7#
    • 1...Qc6
      • 2.Bg7#
    • 1...Qc8
      • 2.Bg7#
    • 1...Qe8
      • 2.Bg7#
    • 1...Qg7
      • 2.Bxg7#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Re4#
      • 1...Qxe6
        • 2.Scb5#
      • 1...Sxe2
        • 2.Sxe2#
      • 1...Qc6
        • 2.Bg7#
      • 1...Qb7
        • 2.Scb5#
      • 1...gxf5!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Re4#
      • 1...Qxe6
        • 2.Sb5#
      • 1...Sxe2
        • 2.Sb3#
      • 1...gxf5
        • 2.Sxf5#
      • 1...Qc6
        • 2.Bg7#
      • 1...Qb7
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(f);N_GUARD::B(L)
    • Q(f);N_GUARD::B(L),XQ(f)
  • Tries
    • Try
      • S(G);
      • Threat
        • R1(C)
      • Vars
        • Q(f);N_GUARD,XP(K)::S(G)
        • S(a);XR(C)::S(G),XS(a)
        • Q(f);N_GUARD::B(L)
        • Q(f);N_GUARD::S(G)
      • Refutation
        • P(e);XP(I)
  • Actual
    • S(G);
    • Threat
      • R1(C)
    • Vars
      • Q(f);N_GUARD,XP(K)::S(J)
      • S(a);N_GUARD,XR(C)::S(G)
      • P(e);XP(I)::S(J),XP(e)
      • Q(f);N_GUARD::B(L)
      • Q(f);N_GUARD::S(J)
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