To win consistently at poker, the preflop is the cornerstone of any winning strategy. Imagine building a house without foundations: that's what an imprecise preflop game represents.
👉 Our mission: to give you ready-to-use key ranges to turn the preflop into a strategic weapon, even if you hate complex theory.
Why does the preflop decide 80% of your profits (or losses)?
Avoid costly traps:
A bad preflop decision (e.g., too wide a call in the SB) forces you to play losing spots postflop.
Maximize invisible EV:
Optimized ranges generate profit even without going to showdown (e.g., making opponents fold with well-calibrated 3-bets).
Avoid tilt from uncertainty:
Knowing your decisions are mathematically solid reduces frustration from bad beats.
How to read a range chart?
Each chart gives you the ideal preflop strategy for each hand you can receive.
For example:
Preflop chart for Small Blind vs Button raise
With this chart, you can see that in the Small Blind facing a Button raise, you should fold most of your hands, shove with some of the remaining hands, and 3-bet with your top hands (AA and KK).
Note: "o" and "s" after the hand, such as AKo or 64s, mean:
"s" (for "suit") means the cards are the same suit (spades, diamonds, hearts, or clubs)
"o" (for "offsuit") means the cards are different suits.
Second note: It's important to specify that the decisions suggested by these charts should not necessarily be followed to the letter. The ideal approach is to know how to adapt to the table dynamics and your opponents.
What sets Poker Sciences apart
Poker Sciences doesn’t just give you range charts. It offers a comprehensive method to understand, memorize, and confidently apply these strategies.
Why do our explanations make a difference?
Understand > Memorize
Instead of just memorizing hands, you learn why each decision is optimal.
Example: Why shove A5o at 12BB but call A5s?
Practical advice for each situation
Dynamic adjustments: How to adjust your ranges based on stack size (e.g., 4BB = maximum aggression, 25BB = more postflop play).
Advanced metagame: How to exploit your opponents' tendencies (e.g., tighten your ranges against overly aggressive players).
A format designed for fast memorization
Visual groupings: The ranges are organized into visual groups to facilitate memorization without losing EV.
What you won’t find anywhere else
✅ Pedagogical explanations
Clear language: No jargon, just practical explanations.
Focus on common mistakes: How to avoid costly traps.
Result: You understand why each decision is optimal, not just how to make it.
✅Progressive learning
Beginners: Start with simplified basics (e.g., 4 blind level categories).
Experts: Dive into the subtleties (e.g., adjustments every 2 blinds).
Preflop charts for Spin & Go (Expresso, Twister, etc.)
Spin & Go formats, such as Expresso and Spin & Rush, are dynamic and fast, played in 3-max or heads-up (HU). With small stacks, usually between 6bb and 25bb, players are forced to make quick and precise decisions. This format requires effective preflop strategies to maximize EV.
If GTO (Game Theory Optimal) remains the foundation of an unassailable strategy, the real key to profitability lies in exploiting ranges – designed to take advantage of opponents' mistakes and maximize your EV.
GTO vs Exploitation: The best of both worlds
Comparison GTO/Explo: Our charts include both the reference GTO strategy and the exploitative version tailored to recreational players ("fish") who make typical mistakes (too many preflop calls, incoherent open-raises, etc.).
Quick adaptation: When playing against recreational players, you can deviate from GTO to increase your profits. Conversely, against solid players, the theoretically unexploitable strategy protects you from counter-adjustments.
Comprehensive ranges for 95% of situations
Whether you're playing 3-max or heads-up (HU), ourpreflop ranges cover sont conçues pour couvrir nearly 95% of spots encountered in Spin & Go:
Standard open-raise and defense
Shove and call all-in at all depths (4bb to 25bb)
Exploitative adjustments against recreational profiles.
How we created these ranges?
1. Analysis of over 1 million real hands (PokerStars, Winamax, Betclic)
Exclusive database: We studied over 1 million Spin & Go hands (from €0.25 to €20) to identify recurring mistakes of "fish".
Typical example: Not enough 3-bet shoves at 18BB+, excessive folds in SB at 6BB, too wide calls in HU.
Pro tools: Combined GTO Wizard and HRC to model leaks and calculate optimal ranges.
2. Exploitative Anti-Fish Strategies 🎣
Priority #1: Maximize immediate EV against recreational players.
Concrete example: At 12BB HU, recreational players don’t adjust their sizing when facing an open from the BB → we recommend increasing open sizing with strong hands.
Priority #2: Avoid excessive variance to optimize your CEV.
Practical case: Sacrificing +0.5BB of EV to avoid a risky all-in at 20BB, preserving your postflop edge and stack for future hands.
3. Intelligent Simplification 🧠
Memorization > Complexity: Visual grouping of hands (+ intuitive colors) and removal of marginal hands (-1% EV max).
Validation: Our simplified ranges retain 99% of the EV of complex ranges.
4. Stack Dynamics & Metagame 📊
Adaptive balance: Fewer compromises on EV in small stacks (e.g., 4-10BB), where every decision counts.
Practical realism: Excluding overly theoretical strategies (e.g., min-raise 100% in HU would be ideal but unrealistic in practice for several reasons).
