C(23,8,2) = 12

Method of Construction: lex covering

Lower Bound: Schonheim

  1  2  3  4  5  6  7  8
  1  9 10 11 12 13 14 15
  1 16 17 18 19 20 21 22
  2  3  4  9 10 16 17 23
  5  6  7 11 12 18 19 23
  2  8 13 14 15 20 21 23
  3  4 13 14 15 18 19 22
  5  6  7  9 10 20 21 22
  5  6  7 13 14 15 16 17
  2  3  4 11 12 20 21 22
  2  8  9 10 11 16 18 19
  1  8 11 12 16 17 22 23