Constructing Reed--Solomon (RS) codes that can correct insertions and deletions (insdel errors) has been considered in numerous recent works. For the special case of two-dimensional RS-codes, it is known [CST23] that an [n,2]q RS-code that can correct from n−3 insdel errors satisfies that q=Ω(n3)
Nearby in the stack
. On the other hand, there are several known constructions of
[n,2]q
RS-codes that can correct from
n−3
insdel errors, where the smallest field size is
q=O(n4)
. In this short paper, we construct
[n,2]q
Reed--Solomon codes that can correct
n−3
insdel errors with
q=O(n3)
, thereby resolving the minimum field size needed for such codes.