劫位河牌圈同花色四bet（HJ River 4-Bet Monotone）
Refers to when on the river, a player in the HJ position makes a fourth bet 4-bet, and the hole card suit combination is suitable for a monotone board.
This term is uncommon in regular poker gameplay and appears more often in theoretical discussions or specific training scenarios. On the river, typical betting rounds involve at most one bet and two to three raises, but theoretically a fourth raise (4-bet) remains possible. 'Monotone' means all community cards are of the same suit, which affects opponents' drawing hands and range construction, making a 4-bet decision heavily dependent on the specific board texture. HJ (Hijack) is a middle-to-late position, and a river 4-bet from there usually indicates an extremely strong range or exploitative play targeting a specific opponent. Given the extremely low frequency of river 4-bets in practice, this term is mainly used to analyze strategy balance in extreme scenarios.