C(10,6,4) = 20

Method of Construction: random greedy covering

Lower Bound: Schonheim

  2  3  5  6  7  8
  1  3  7  8  9 10
  1  2  4  6  8  9
  1  2  3  4  5 10
  4  5  6  7  9 10
  2  3  4  6  7 10
  1  3  4  5  7  9
  2  3  4  8  9 10
  1  2  5  7  8 10
  3  5  6  8  9 10
  1  2  3  6  7  9
  2  4  5  7  8  9
  1  3  4  5  6  8
  1  2  5  6  9 10
  1  4  6  7  8 10
  2  3  4  5  6  9
  1  5  6  7  8  9
  1  2  3  6  8 10
  3  4  5  7  8 10
  1  2  4  7  9 10