UTG+1 河牌彩虹面持续下注（UTG+1 River C-Bet Rainbow）
Refers to the action of a player in the UTG+1 position who, after betting on the flop, bets again on the river when the board is a rainbow three cards of different suits.
Position and Range
UTG+1 (Under the Gun +1) is the second position in early position. With only UTG in front, players in this position typically adopt a tight-aggressive strategy, entering pots with a strong range that includes large pairs, high suited connectors, and some small to medium pairs. A preflop raise strengthens the representation of their range.
Motivation for River C-Bet
The frequency of a river continuation bet (C-Bet) is usually lower than on the flop, because only one community card remains and draws have either completed or failed. On a rainbow board, flush draws are no longer possible, so the bet leans more toward value betting (top pair or better) or bluffing using the preflop range advantage (e.g., holding high cards that missed, but attempting to force opponents to fold).
Effect of Rainbow Board
A rainbow board means the community cards have no flush draw, so the opponent's drawing range includes only straight draws and possible pair draws. This reduces the opponent's bluffing difficulty and makes UTG+1's continuation bet more likely to be interpreted as a strong hand. The typical response is: UTG+1's river C-Bet on a rainbow board usually represents top pair top kicker, two pair, or trips or better.
Strategy Example
Suppose UTG+1 raises preflop, bets the flop, checks the turn, and the river comes rainbow. If UTG+1 bets again, he may hold hands like AK with an A or K pair, or pairs 99 or higher. If he holds AQ that missed, he might also choose to bluff, but must account for the opponent's calling station tendencies. Generally, UTG+1's range on a rainbow river board leans toward value betting, as the preflop range already excludes many trash hands.
Notes
In actual play, frequency and range need adjustment based on opponent type, stack depth, and historical dynamics. This term describes the action definition under typical circumstances.