re: Poker & Wet and Dry Boards
It's a function of matching the preflop raising range to the board texture. When someone has put in a 3-bet and called a 4-bet, and the flop comes 664 rainbow, AA (theoretically) becomes the nuts because there should be no 66, 44, or 6x calling a 4-bet preflop.
That example explains the range interaction side. The other side is the board texture being "wet", meaning coordinated.. 3 to a straight, 3 to a flush, ex. 789 of hearts is about as "wet" of a flop as there can be, vs. K82 rainbow is about as "dry" as a board can be - no flushes or straights possible.
An important feature to note with Ace high "dry" boards is the possibility of a wheel straight - ex. A35 is a dramatically different board than AK7, although we often don't realize this and play them the same with AJ, AQ, AK
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