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Double-blind is not the only blind structure, you know. Lots of games have single-blinds.
Yep. In fact, a single blind is the tradition form of the game since the 1800s. The two-blind structure evolved as a blind with a mandatory straddle. Three blinds is also not uncommon (third on the button). LDC 03:28, 18 February 2007 (UTC)
To be more specific, the practice of straddling the blinds involves the player (third on the button), often referred to as (under the gun) placing a bet twice the size of the big blind before looking at their hole cards. --Jason thorn 02:28, 14 March 2007 (UTC)