TPGK against the overly tight

[akira]

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I agree. I would check/call the flop and turn and possibly lead the river. Although an opponent this aggressive may bet the river anyway and if you lead may realize that there's a good chance a river raise with a worse hand wins without showdown.

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Maybe a n00b question, but what would be the reasoning to lead out on the river after calling down? (or did you mean only when a scare card comes?)