C(52,21,2) = 9

Created by: Jan de Heer and Steve Muir

Method of Construction: Private tools

Lower Bound: Bounds for fixed number of blocks

  1  2  4  8 12 18 21 23 25 28 29 32 33 34 37 38 40 44 46 48 49
  1  3  4  9 13 15 18 19 20 22 24 26 27 30 38 39 41 42 43 46 47
  1  4  5  6  7 10 11 14 16 17 18 31 35 36 38 43 45 46 50 51 52
  2  3  6  7  8 13 19 22 23 25 26 29 34 37 42 43 44 45 47 50 52
  2  5  8  9 11 21 22 23 25 26 27 28 29 31 32 33 36 40 41 49 51
  2  8  9 10 14 15 16 17 20 23 24 25 27 29 30 34 35 37 39 41 44
  3  5 11 12 13 15 19 20 22 24 30 31 34 36 37 39 42 44 47 48 51
  3 10 12 13 14 16 17 19 21 22 26 28 32 33 35 40 42 43 47 48 49
  6  7  9 12 15 20 21 24 27 28 30 32 33 39 40 41 45 48 49 50 52