UTG+1河牌圈四次加注（干燥牌面）（UTG+1 River 4-Bet Dry）
In Texas Hold'em, refers to a player in the UTG+1 position, on the river, with a dry board no possible draws, making a fourth bet i.e., a third re-raise, usually representing a very strong hand.
Position and Round
UTG+1 (Under the Gun +1) is the position immediately after the under-the-gun player and belongs to early position. The range for entering the pot from this position is relatively narrow, and post-flop play typically requires stronger hand strength than later positions. The river is the betting round after the final community card is dealt.
Action Meaning
A 4-bet pre-flop refers to the third raise, but on the river, the betting sequence is: one player bets → another player raises → a third player re-raises (3-bet) → a fourth player re-raises again (4-bet). Therefore, "River 4-bet" refers to the fourth raise on the river. Since the number of actions on the river is usually limited, a 4-bet is extremely rare and generally indicates an absolute monster hand (e.g., the nuts).
Dry Board
"Dry" means the board has no obvious straight or flush draws. For example, a board like K♠9♥3♦2♣7♠ offers no plausible draws. On a dry board, players' ranges are more defined, and a 4-bet bluff is highly unlikely—almost exclusively representing a value range, such as top full houses, quads, etc.
Comprehensive Interpretation
Making a dry-board river 4-bet from UTG+1 generally indicates that the player holds a very strong made hand and is trying to extract maximum value. This action almost never involves bluffs, because bluffing from early position in a multi-way pot carries extremely high risk. Opponents facing this action will often have to fold everything except the nuts.
Strategy Note
This term is more often used in theoretical analysis or high-level play. In practice, recreational players might make such moves due to misunderstanding or emotional tilt, but from a strict strategic perspective, it should only be employed when holding the absolute nuts.