Wheeling Systems Checker 4.0.5 now available

Welcome to the Covering Repository website

The aim of this website is to collect the best wheeling systems (a.k.a. lottery wheeling, lotto designs, covering designs) known today.

A Covering Design c(v, k, t, m, b) is a pair (V, B), where V is a set of v elements (called points) and B is a collection of b k-subsets of V
(called blocks) such that every m-subset of V intersects at least one member of B in at least t points.

We host coverings with v > k ≥ t and v > m > t.
Allowed values: 4 ≤ v ≤ 90 , 2 ≤ k ≤ 15 , 2 ≤ t ≤ 15 , 3 ≤ m ≤ 20

Pick a block size (k) or visit the coverings page


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