his problem is not that he didn't develop, but that he didn't capture your en prise pieces. come to think of it, the same with you, although not as much.
Black punished for not developing queenside
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good games
no, not developing queenside, and having so little active pieces stopped him from being able to develop and defend once white started to attack.
Here are a couple games where my oppon
et made the fatal mistake of leaving his/her queenside mostly undeveloped.The second game is a better example of this than the first, but I still think this was a big part of my first opponent's problem.