Daniei plays chess ----,if not better than,David.A.as well B

这个句子是这样的,
if Daniei plays chess not better than David,Daniei plays chess as well as David.
as well as 和.一样好
这样你就明白了吧
如果丹尼尔不比大卫玩得好,他也和大卫玩得一样好.
再问： 我知道no better than...不比谁... 也可以no tbetter than...吗