[Gonso]

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1. One large denomination chip is released into the pot and even if the amount would consitute a legal raise, it is ruled a call.

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Yes. If you're playing 2/5NL and a player raises the BB to $15, and the next player throws in a green, it's still a call even though $25 is just enough to make a legal reraise had it been declared a raise.

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2. Two chips are released into the pot such that while the amount does consitute a legal raise, the circumstances appear, and are common, that the intent of the player was to call.

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Only if the chips are not in excess quantity than what is required to make the call using that particular denomination. (that sounds pretty good, that should be in the rulebook). IE - two redbirds calling $6 is fine, but putting out 3 reds would be raising to $15.