Board Thread:Versus Debates/@comment-142748-20150410212019/@comment-26127155-20150412221412

Hashirama is experience with how Uchiha fight, but you are assuming he will instantly recognize Itachi as an Uchiha. Their main distinctive feature is their EYES, and by the time he sees that the game is over. Itachi would have relatively low chakra reserves and that is the only knowledge he would be able to go by (chakra sensing), I doubt Hashirama would instantly use his top tier moves (this starting advantage gives momentum throughout the rest of the battle) and even if he did use these move, Itachi does have moves which could clear that level of landscape (Ameterasu, Matagama, etc).

You are just making assumption after assumption that Hashirama would some how know Itachi's moves and abilities inside out. If Hashirama is anywhere near as reckless his grand daughter is (due to their godly healing abilities) then Hashirama is done for, as one strike of the totsuka blade would finish Hashirama for good. Hashirama is unaware that anyone could make Tsukuyomi seem to last for three full days of agonizing torture as Hashirama didn't exist during that time. Hashirama would have to spend quite a while during the battle figuring out all of Itachi's abilities and how to counter them.

Itachi would at least have knowledge that Hashirama was a hokage (if you can't at least give Itachi that credit than you are just saying his an idiot. Itachi's research on Konoha's history may or may not include the abilities of all of its former leaders, but this knowledge of Hashirama would be greater than Hashirama's knowledge of Itachi.

In the Naruto series, knowledge is the key in battle. Pain stated Jiraiya would have won if he knew about the six paths. While Pain was much stronger than Naruto, but lost due to Naruto having knowledge about all of Pain's abilities.