lower bound = 12

C(14,5,2) = 12

Method of Construction: lex covering

Lower Bound: Schonheim

  1  2  3  4  5
  1  6  7  8  9
  1 10 11 12 13
  2  3  6 10 14
  4  5  7 11 14
  2  3  7  8 12
  2  3  9 11 13
  4  5  6  8 13
  4  5  9 10 12
  6  8 11 12 14
  1  7  9 13 14
  1  2  7  8 10