HJ 25bb Open Jam

Overview

In poker tournaments, particularly in later stages when blinds are high relative to stack sizes, players often employ aggressive shoving strategies. The "HJ 25bb Open Jam" refers to a specific tactic: a player in the Hijack position (the seat two to the right of the button) with exactly 25 big blinds decides to move all-in pre-flop as their first action, rather than making a standard raise.

Rationale

With 25 big blinds, a player is in a stack size that is often considered awkward for standard raising. A standard raise to 2-2.5bb commits a significant portion of the stack but leaves enough behind that post-flop play can be difficult, especially out of position. By open-jamming, the player applies maximum pressure to opponents yet to act, forcing them to make decision for all their chips with hands that might otherwise call a raise. This tactic exploits the fact that many players are reluctant to call a big all-in without premium hands, allowing the jammer to pick up the blinds and antes uncontested frequently.

When to Use

The HJ 25bb open jam is most effective when:

• The table is tight and players are folding too often to all-ins.
• The players left to act (CO, BTN, SB, BB) are not calling too wide.
• The jammer has a hand that is too strong to fold but not strong enough to play a raised pot post-flop (e.g., medium pairs, suited connectors, Ax hands).
• The tournament payout structure or ICM considerations make calling ranges tighter (e.g., on the bubble or near pay jumps).

Considerations

While this play is common in GTO (Game Theory Optimal) solutions for short stacks, it is not without risks. If opponents adjust by calling wider, especially with hands that dominate the jammer's range, the jam can become -EV. Additionally, open-jamming from HJ with 25bb may be suboptimal in cash games where stacks are deeper and players are less risk-averse. The strategy is most prevalent in tournaments with antes, where the dead money increases the incentive to steal.

Example

Blinds are 500/1000 with a 100 ante (9 players). Hero in HJ has 25,000 chips (25bb). Hero looks down at A♠9♠. Rather than raising to 2,200, Hero open-jams all-in. The cutoff folds with 77, thinking it might be a coinflip and not wanting to risk tournament life. The button folds AJo, also not wanting to call off 25bb. The small blind folds, and the big blind calls with TT. Hero is about 30% to win. In this example, the jam likely picked up the blinds and antes (about 2.5bb) most of the time, making it profitable long-term even if sometimes called.

Related Terms

• Open shove
• Push/fold
• Hijack position