Flop Range Betting Frequency Table: CO vs BB on T-7-2 Rainbow Board

Position Scenario Description

Scenario: 6-max cash game, effective stacks 100BB. Hero opens to 3BB from CO, BB calls. Flop is T♠7♣2♦ (rainbow board, no flush draw). Pot size 6.5BB. As the preflop aggressor, Hero needs to decide whether to continuation bet (c-bet) on the flop.

Recommended Range (Text Description)

CO preflop opening range (approximately top 25% of hands): 44+, A2s+, K7s+, Q9s+, J9s+, T9s+, 98s+, 87s+, 76s+, A9o+, KTo+, QTo+.

Flop betting range (approximately 70% frequency):

• Value bets (approximately 30%): top pair or better, including TT (set), 77, 22, AT, KT, QT, JT (top pair top kicker), T9s, T8s (top pair with a draw), some overpairs (e.g., JJ, QQ).
• Bluff bets (approximately 40%): gutshots (86s, J8s, J9s), backdoor flush draws (e.g., A♠X♠, K♠X♠), two overcard backdoor draws (e.g., AK, AQ of specific suits), some A-high hands (betting at low frequency when no draw), and some small pairs (e.g., 55, 66) as semi-bluffs when they are overcarded.
• Check range (approximately 30%): weak A-high hands (e.g., A9o with no draw), middle/low pairs (99, 88, 77? Note: 77 is a set and is already bet), some QJ, KJ with no draw, etc.

Range Construction Logic

GTO principle: The flop c-bet frequency should make the opponent indifferent between calling and folding (Nash equilibrium). On a T-7-2 rainbow board, CO has a clear advantage: more top pairs and sets, and a polarized range. Therefore, an overall c-bet frequency of about 70% is recommended, with a value-to-bluff ratio of approximately 1:1.3 (taking into account opponent's fold equity). Specific construction steps:

1. Identify value hands: All made hands stronger than top pair weak kicker (e.g., A7) are value, about 30% of total range.
2. Identify bluff hands: All draws (gutshots, backdoor flush draws) and some A-high hands (when backdoor draws exist), about 40%.
3. The remaining 30% of weak hands (no draw, no showdown value) are checked to avoid overbluffing.

Adjustment Factors

• Opponent tendencies: If BB folds too often (e.g., fold to c-bet > 60%), increase c-bet frequency to 80% or even 100%, reducing checks with weak hands; if opponent frequently check-raises, tighten the betting range and reduce bluffs.
• Board texture: If the flop is wetter (e.g., T-9-8), bet frequency should drop to 50% or less because the opponent's range hits more often. This board is dry, so high-frequency betting is viable.
• Stack depth: Deep stacks (>200BB) call for lower frequency to avoid being raised by draws; shallow stacks (<50BB) allow betting the entire range with small sizing.
• Position weight: Out of position (OOP) bet frequency should be lower than in position (IP). Here we are IP, so aggression is warranted.

GTO Reference

Using a solver to calculate a simplified GTO strategy: On a T-7-2 rainbow board, CO's c-bet frequency against BB is about 68–72%, with bet sizing typically 33% pot (small bet) or 50–66% pot (medium bet). With a small bet strategy, the range is wider and the value/bluff ratio is balanced; with a larger bet, value hands should be more concentrated and bluffs halved. For practical play, a 33% pot bet is recommended to simplify decisions.

Practical Application

• Single bet strategy: Use a high-frequency small bet strategy. The check range includes A-high with no draw, 99, 88, etc. If opponent check-calls, decide on the turn based on the board.
• Exploitative adjustments: If you observe BB defending too little (fold to c-bet too high), adjust to betting your entire range, including all A-high hands; if opponent check-raises frequently, reduce bluffs with A-high and include more strong hands (e.g., top pair) in your checking range to trap.
• Example: Holding A♠Q♠ on T♠7♣2♦ (backdoor flush + gutshot draw with JQ), you should bet. Holding A♣J♣ with no backdoor, check. Holding KTs, bet. Holding 99, check.

This frequency chart serves as a basic framework; adjust flexibly based on real opponent dynamics.