same opening: Game from the past

Hello. I have a question. Is it cheating if I play a game exactly like a game in the past. Like if I have a huge database and I check the opponent's move and  then search my database if that particular move was played any one. and say i find 10 games which has exactly the same moves, and  select a move from those 10, for my games. i am playing this online game, and till now (15th move) the game has exactly the same moves,same position of a game played by Mikhail Tal in 1959 and another game by GM Sergie Movesesian in 2010. So should i countinue with playing the exact same moves from those games...and look at those games from the database?

There is some controversy over that. The official chess.com line is that using books and databases is allowed for "online" game play. (But not tablebases.)

https://support.chess.com/customer/portal/articles/1444879

Thank you @notmtwain I am playing Online #Correspondence chess. I read the link and I think i am fine because I don't have anytable bases and I uses opening books only, sometime the 'http://en.wikibooks.org/wiki/Chess_Opening_Theory/' and some time look online.

I have another queston, @Notmtwain: That article says losing intentionally is also cheating. But some time the game get so much complex that it gives one headache. No one is dominant or losing, but one can't decide what to move and where to move, I resign such games. Is that considered  as 'intentional losing'?

@chessmicky Yes, it is throwing it away. 

I agree with chessmicky. It is not cheating. Perhaps in such situations, you could make use of the vacation option to wait until your headache clears.