Blind Heads-Up C-Bet Strategy on A-High Boards (Limp-Raise Line) [Ajo MTT Vol.6]

Written by: Ajo (X: @AjoPoker)

Preflop Recap

SB's open construction

• 22–44 small pairs and various Axo hands go all-in
• About 55% of the range limps

The limp range mixes "want to play but not strong enough to ship," some suited aces for board coverage, and weaker offsuit hands.

BB's response to the limp

• 22–55 jam pure, with some Axo mixed in
• The small-raise side has 66+, A7s+, K9s+ as pure raises and 27o, 37o style trash mixed in as bluffs — a polarized construction

BB raises value hands for value and trash for fold equity, while middle-strength holdings get checked.

SB's response to BB's raise

• Fold: about 37%
• Axo mostly 3-bet jams
• Most pocket pairs also 3-bet jam
• Suited hands mostly call

→ That suited-skewed call range is what we'll be c-betting into. The Axo hands have largely cashed out as 3-bet jams, so they're missing from SB's flop range entirely.

A-High Boards: BB's C-Bet Strategy

Now the postflop core. Three A85 textures, one at a time.

Why A-high is so good for BB

A common thread across all three boards: SB's call range has almost no Ax (the Axo went into 3-bet jams), while BB's raise range is A-heavy (A7s+, A4o/A5o, etc.).

→ A-high flops are dominated by BB. Default posture: high-frequency range betting.

1. A85 Rainbow

• Range bet (essentially every hand c-bets)
• Sizes used: 29% and 45% of pot

With a dry, rainbow texture and no real straight-draw threat, BB's structural advantage (SB has barely any aces) just gets to play out. The 29% size dominates as the default; stronger or more protection-needy hands push up to 45%.

2. A85 Two-Tone

• Almost range bet
• Sizes used: 14%–45% of pot

The wrinkle: SB's call range is suited-heavy (Kxs / Qxs / Jxs / Txs etc.), so a two-tone board lands on more of their flush draws than BB's.

So:

• BB is still clearly ahead, but bet frequency dips slightly
• Especially with hands worried about a flush draw, smaller sizes become more common as a "range bet at small size" line

3. A85 Monotone

• Bet frequency: 72% (not a range bet)
• Dominant size: 14% of pot
• Equilibrium even allows a small ~5% SB donk frequency

The two-tone trend dialed up to 11. A-high still favors BB on average, but most flushes and strong flush draws live in SB's range, so BB's edge thins out:

• Large sizes (45%+) are mostly off the menu
• The 14% small bet, used broadly, is the main line
• Some hands move into the check range

Summary

After SB-limp → BB-raise in blind heads-up at 25bb, A-high flops are massively in BB's favor.

Key takeaways

1. A-high boards belong to BB — SB's call range has basically no Ax, so BB's ace advantage is extreme
2. Rainbow = range bet at 29% / 45%
3. Two-tone = mostly range bet with smaller sizes weighted in
4. Monotone = trim the range — most flushes live in SB's range; default to a 14% small bet, broadly

Practical notes

• Watch the opponent's 3-bet jam frequency preflop — if it's under-frequency, you can widen your raising range over their limps with impunity
• Watch how often they float postflop — that feeds into how you should construct turn play on the two-tone and monotone variants

Future installments will continue with c-bet strategy on K-high and paired boards.

Blind Heads-Up 25bb Preflop Strategy [Ajo MTT Vol.1]

The preflop companion to this article — covers what BB raises with and why the ~40% number shows up.

📖 10 min ★★★★☆

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Back to Ajo's Tournament Strategy Series

A series on MTT strategy using GTO Wizard. Browse the other installments here.

📖 3 min ★★★★☆

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