[MrMxyztplk]

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One thing I've noticed is that 400nl seems to be the level where table selection really starts to get important. While there were good and bad tables at 100/200nl, there weren't many tables where a decent player couldn't hold his own. But at 400nl some tables are full of 27/20 types who never let you open a pot and are real tough.

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I find table selection is overrated. If you want to show a nice short term profit, then yes, good selection skills are very useful. But if you want to get a good long term profit, you need to improve and move up. Nothing does that better than sitting down with a bunch of 27/20 regulars.