One-chip rule: practice reference

Off-table study · Poker TDA 2024 v1.0 · checked September 6, 2026. TDA has announced a planned mid-September 2026 update. Check the event’s adopted version. These original examples are not live rulings.

Every case: postflop no-limit Hold’em, in turn, full raise rights, minimum bet 200, no prior street chips and one clear chip motion. “Facing” is a full opening bet, or zero for C10. “Stack” is the actor’s entire stack before moving chips. Amounts are tournament chips.

Cover the answer column, explain the action, then check it. Scroll on narrow screens. C06–C08 move the last physical chips; change can still leave chips to play.

Ten cases and answer key
Case	Facing	Chips moved / words	Stack	Action / adjustment
C01	400	1,000 Silent	5,000	Call 400 600 change
C02	400	500 + 500 Silent	5,000	Raise to 1,000
C03	600	500 + 500 Silent	5,000	Call 600 400 change
C04	400	500 + 100 Silent	5,000	Raise to 800 Add 200
C05	400	500 + 25 Silent	5,000	Call 400 125 change
C06	400	500 + 25 Silent	525	All-in to 525 Not a full raise
C07	400	1,000 Silent	1,000	Call 400 600 change
C08	600	500 + 500 Silent	1,000	Call 600 400 change
C09	400	1,000 Say “Raise to 1,000” first	5,000	Raise to 1,000
C10	0	1,000 Silent	5,000	Bet 1,000

TDA Rules 40 and 43–45. C01/C02 change denominations; C02/C03 change the opening bet; C04/C05 cross the half-raise threshold; C05/C06 change chips behind. C07/C08 remain calls despite moving the last chips. C09 declares first; C10 faces no wager.

Record the missing facts

This blank record does not calculate or collect answers. An incomplete description is a reason to ask for clarification, not guess from the final pile.

Event rules / version / date

Opening bet, current wager and last full raiseWas this still an opening-bet situation?

Exact words, their timing and whose turn

Chip denominations moved, prior chips and chips behindWere prior chips left out, removed or replaced?

What is known, what is missing and the staff’s ruling

Stop the simplified test for prior street chips, undercalls, multiple motions, unclear words, earlier raises or unavailable raise rights. Rule46 handles prior-chip questions. Staff establish a disputed action.

Learn the method and download its checks at GTO Gecko’s one-chip rule guide. The guide and this sheet are published by GTO Solutions AS. No tested learning effect or app adjudication is claimed.