Both characters are in a small place in Düsseldorf, talking and playing a game of chess to know for sure who has the most raw intelligence.
Who will prevail?
Yohan's level of manipulation is far greater than L's. Unlike L, Yohan didn't have any special organization backing him, he just had his own wits to make him one of the most feared and respected psychopaths in in the world, and that was only to the remote few who knew him. Of those few, I believe all of them were people he let know in the first place. He did more than L and arguably Kira without superpowers or special training. A chess game should go to Johan, especially if he's allowed to speak during the match.
L in my opinion. Strategically he seemed better than Johan. Psychologically Johan is superior by a mile. But in strict chess L would take it unless Johan put him down so much that L killed himself. Lol.
@taichokage: LOL I just pictured Johan telling L that hes a Emo and to stop solving crimes because its pointless then L killing himself.
I don't know L is actually, in my opinion, better both strategically and mentally. The only reason he died was because he was faced with Hax death abilities that he couldn't explain to anyone else because they would have thought that he was insane. People forget that, without the Deathnotes powers, Kira wouldn't have stood a chance against L.