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ICM & Stack Strategy
Tournament Crash Course — Intermediate Level
ICMPush/Fold
Stack ZonesBlind Stealing
AntesPay JumpsRe-Entry
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ICM
What ICM Really Means — And Why It Changes Everything
ICM stands for Independent Chip Model. It's the mathematical framework that converts tournament chips into real dollar equity. The critical insight: chips do not have linear value.
Example: 4 Players Remain — $10,000 Prize Pool
P3 has 10K chips and P4 has 10K chips — same stack, same ICM equity (~$1,700). If P4 doubles through P3 to get 20K chips, their ICM equity does not double to $3,400. It goes to about $2,400. Chips gained are always worth less than chips lost.
The ICM lesson: Every all-in decision in a tournament must be evaluated not just by chip equity but by prize equity. A profitable chip play can be a losing ICM play.
ICM IN PRACTICE
ICM on the Bubble — A Real Example
Four players remain. Three cash. Here is how ICM pressure differs by stack:
Stack Sizes
You (P1)40 BB
P2200 BB
P38 BB
P45 BB
P3 and P4 are the two shortest stacks. They are desperate and will bust soon. You are in a comfortable spot.
✓
Your Correct Play
Fold almost everything. P3 and P4 are about to bust — possibly to each other or to the blinds. You are 3 hands away from cashing without risking a chip.
✗
The Mistake
Calling P2's shove with A-K. You're a slight favorite but risking your entire stack for a marginal chip edge while two players are about to bust for free.
💡
The ICM Rule
When shorter stacks exist, any all-in risk that could eliminate you is highly suspect — even with strong hands. ICM equity is worth more than chip equity here.
PUSH / FOLD STRATEGY
Push/Fold Under 15BB — Your Decision Roadmap
When your stack falls below 15 big blinds, the math shifts. Raising small is no longer correct — every raise commits you anyway. The only options are all-in or fold.
| Position |
At 10BB — Push Range |
At 7BB — Push Range |
At 5BB — Push Range |
| UTG (6-max) | Any pair, A-x, K-J+ | Any pair, A-x, K-9+, Q-J | Any pair, A-x, K-8+, Q-T+ |
| Hijack | Any pair, A-x, K-9+, Q-J | Any pair, A-x, K-7+, Q-9+ | Any pair, A-x, K-6+, Q-8+, J-T |
| Cutoff | Any pair, A-x, K-7+, Q-9+ | Any pair, A-x, K-5+, Q-8+, J-9 | Almost any two cards |
| Button | Any pair, A-x, K-5+, Q-8+, J-9 | Almost any two cards | Any two cards |
| Small Blind | Any pair, A-x, K-6+, Q-9+ | Any pair, A-x, K-4+, Q-7+ | Almost any two cards |
Key principle: These ranges assume a standard table with no antes. With antes, push wider by approximately 15-20% across all positions. The larger the pot, the more profitable the steal.
STACK STRATEGY — 10BB
10 Big Blind Strategy — The Open-Shove Zone
At 10BB you are firmly in push/fold territory. Every raise you make is essentially all-in anyway — so make it official and gain fold equity.
When to Open-Shove at 10BB
✓ Action folds to you in late position — shove wide
✓ You are the first one in — shove rather than raise-fold
✓ You have a hand that dominates calling ranges (A-x, pocket pairs)
✓ The players left to act are tight — high fold equity
Calling Ranges at 10BB
When facing a shove at 10BB, you need roughly 35-40% equity to call profitably (depending on pot odds). Good calling hands:
✓ Call: Any pair 7-7+, A-J+, A-Ts+
⚠️ Marginal: A-9, K-Q, small pairs
✗ Fold: Suited connectors, weak aces, offsuit broadway
📖 From the Tables
"I had 10BB at a Horseshoe tournament, action folded to me on the button. I looked down at 7-4 offsuit and shoved. Both blinds folded. I picked up 3.5BB without a fight. The hand I had was irrelevant — the position and fold equity were what mattered. Three orbits later those stolen chips helped me reach the final table." — Phil
STACK STRATEGY — 5BB
5 Big Blind Strategy — Survival Mode
At 5BB you are in extreme danger. You have roughly 2-3 orbits before the blinds eliminate you. Your range opens to nearly any two cards from late position.
1
Shove Any Two Cards from Button/CO if Folded To
At 5BB the math strongly favors shoving any two cards from late position. You are getting 2:1 on your money when both blinds fold, and even if called you often have 35%+ equity.
2
Don't Wait for Premium Hands
Waiting for A-A with 5BB is a losing strategy. By the time you find A-A, you may have 2BB and shoves have zero fold equity. Act while the steal is still worth stealing.
3
From the Big Blind — Defend Wider
At 5BB in the big blind you are getting tremendous pot odds to call any shove. You need about 25% equity to call. That means calling with virtually any two cards.
4
The Miracle Mindset
With 5BB you need things to go right. Shove, get called, win the flip. Then shove again. Players have come back from 3BB to win tournaments. Stay aggressive — not passive.
The cardinal sin at 5BB: Folding your big blind to a shove from a reasonable hand because you "don't want to gamble." At 5BB, gambling is mandatory. Pick your spot and go.
STACK STRATEGY — 20-30BB
The 20-30BB Danger Zone — The Hardest Stack to Play
The 20-30BB zone is the most difficult stack depth in tournament poker. You have too many chips to shove without a read, but not enough to play post-flop poker freely.
❌ What NOT to Do
✗ Open to 2.5BB and fold to a 3-bet (burning chips)
✗ Call raises and then fold to continuation bets (bleeding)
✗ Play speculative hands (suited connectors, small pairs)
✗ Call off your stack with marginal holdings
✅ The 20-30BB Framework
✓ 3-bet or fold — when someone raises, either re-raise all-in or fold
✓ Open only hands you're happy getting it in with
✓ Look for open-shove spots in late position
✓ Steal blinds aggressively to build back to 40BB
The danger zone principle: Every chip you waste at 20-30BB is a chip you needed to survive. Open tight, play aggressive pre-flop, and avoid post-flop situations where you might be wrong about where you stand.
ANTES
Antes and How They Change Your Shoving Range
Without Antes — 400/800
Pot before cards: 1,200 chips
You shove 8,000 from the button.
Both blinds fold — you win 1,200 chips.
ROI on steal: 15% of your shove
With Big Blind Ante — 400/800/800
Pot before cards: 2,000 chips
You shove 8,000 from the button.
Both blinds fold — you win 2,000 chips.
ROI on steal: 25% of your shove — 67% more valuable
Antes don't just add chips to the pot — they change the math of every decision. Stealing one round of antes can add 15-25% to your stack. This is why aggression increases dramatically once antes are in play.
Practice habit: When antes kick in, immediately recalculate your big blind count. Then ask: "Who at this table is tight enough that I can steal from?" Identify your targets before the next orbit.
BLIND STEALING
Blind Stealing in Tournaments — Precision Over Randomness
Blind stealing is not random aggression — it's a targeted skill that requires reading your opponents and picking the right moments.
🎯
Target the Right Players
Steal from tight players who fold too often. Avoid loose players who defend wide. Avoid short stacks who will call with almost anything — stealing their last chips risks your stack.
📍
Position is Everything
Steal from the button and cutoff where you have position post-flop if called. Stealing from UTG requires a much stronger hand since you face more players.
📏
Sizing Matters
Standard steal raise: 2 to 2.5x the big blind with antes, 2.5 to 3x without. Smaller raises are profitable when fold equity is high. Larger raises burn chips unnecessarily.
🔄
Your Image Affects Success
If you've been caught stealing recently, tighten up — players are watching. If you've shown down strong hands, your steals get more respect. Use your table image actively.
The steal frequency target: Against typical casino tournament fields, you should attempt to steal the blinds approximately once per orbit from late position. More than that attracts calls. Less than that bleeds your stack.
BLIND DEFENSE
Defending Your Blind in Tournaments — ICM Changes Everything
In a cash game you defend your big blind wide because you're getting a good price. In a tournament, ICM pressure often makes folding the correct play even with a decent hand.
Cash Game Thinking (Wrong)
✗ "I'm getting 3:1, I'll call with any two cards"
✗ "I already have chips in — I might as well see the flop"
✗ "A-8 offsuit is a calling hand here"
✗ "I can outplay them post-flop"
Tournament Thinking (Correct)
✓ "Calling risks my entire tournament life on a marginal hand"
✓ "The pot odds don't account for ICM pressure"
✓ "A-8 offsuit out of position is a fold on the bubble"
✓ "Preserving chips is worth more than this pot"
Blind defense rule of thumb: In the money or near the bubble, defend your big blind only with hands you'd be comfortable calling an all-in with. Otherwise fold and protect your stack for a better spot.
TOURNAMENT FORMATS
Re-Entry and Rebuy Tournaments — A Different Game
🔄 Re-Entry Tournaments
You can re-enter after busting during the re-entry period (usually Level 1-6). Each re-entry costs the full buy-in again.
Strategy shift: Play more aggressively early. If you bust, you re-enter with a fresh stack. Don't be reckless — but take +EV spots you'd normally avoid in a freezeout.
Key consideration: Budget for potentially two buy-ins.
💰 Rebuy Tournaments
You can add chips during the rebuy period (often when at or below starting stack). An add-on is usually offered at the end of the rebuy period.
Strategy shift: Very aggressive during rebuys — accumulate chips while others are timid.
Always take the add-on if it's cost-effective. Getting chips at a discount is almost always profitable.
Know your budget — rebuys can triple your total investment.
Freezeout vs re-entry: In a freezeout (no rebuys), survival matters more. In re-entry, accumulation in early levels is more valuable because mistakes are recoverable. Adjust your risk tolerance accordingly.
PAY JUMP MATH
Reading Pay Jump Implications — Every Spot Has a Price
Pay jumps change the math of tournament decisions. The bigger the jump between places, the more conservative you should be about risking your stack.
📊 Example Pay Structure — 30 Players Cash
The jump from 4th to 3rd is $800. From 3rd to 2nd is $1,000. From 2nd to 1st is $2,000. Each of these jumps represents a specific risk tolerance for all-in situations at that stage.
The calculation: Before calling off your stack near a pay jump, ask "what is this spot worth in real dollars?" A $800 pay jump for 3rd place means risking $800 of guaranteed equity on a coin flip for more chips. Sometimes the math says fold — even with a good hand.
BIG STACK PLAY
The Chip Leader's Responsibility — Apply Maximum Pressure
⚡
The Big Stack Is a Weapon
As chip leader your risk of elimination is lowest. Use this asymmetry. Every other player at the table is more afraid of you than you are of them — exploit it.
🎯
Target Medium Stacks
Medium stacks (20-40BB) have the most to lose — a bad call could cripple them. They are the tightest players at the table. Steal from them relentlessly.
⚠️
Don't Tangle with Other Big Stacks
If another big stack calls your raise or 3-bets you, back off with marginal hands. The only player who can hurt you is another big stack. Choose your battles carefully.
🛑
Avoid Unnecessary Gambling
Being chip leader doesn't mean calling off 80% of your stack in a flip. Accumulate through aggression, not coin flips. Protect your lead.
The chip leader's mindset: You didn't build that stack to gamble it away. Sustainable aggression — stealing, applying pressure, making others fold — is more valuable than gambling with premium hands.
TOURNAMENT PHILOSOPHY
Short Stack Survival vs Playing to Win
Every tournament player faces this question: when the money is secured, do you play for survival or accumulation? The answer depends on the pay structure and your chip position.
Play for Survival When...
→ You are on or near the bubble
→ A significant pay jump is one elimination away
→ Multiple shorter stacks exist who will bust before you
→ The difference between cashing and not is life-changing
Play to Accumulate When...
→ You are in the money with many players remaining
→ The top prizes are significantly larger than your current pay jump
→ Your stack is short and survival means blinding out anyway
→ You need chips to realistically compete for the top prize
The most common mistake: Min-cashing becomes the goal instead of the floor. Once you're safely in the money, shift to accumulation mode. The min-cash is rarely worth the tournament entry — the real money is at the top. Play to get there.
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Lesson Complete!
♣ ICM means chips have non-linear value — prize equity matters more than chip equity
♣ Below 15BB: push or fold — no more small raises
♣ Antes make blind stealing 60-70% more profitable — open up once they kick in
♣ On the bubble: count short stacks before risking your tournament life
♣ As chip leader, target medium stacks — they fear you most
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