Understanding how to read odds is the difference between “taking a shot” and making a smart, measured wager. In Sunwin’s Over/Under (often called Tài Xỉu) games, the board moves fast, numbers change quickly, and small percentage edges matter over time. If you’re new to sunwin, this guide will help you decode every number before you place a stake.
What “Over/Under” Means in Sunwin (Tài Xỉu)
Over/Under is a totals-style wager. You’re betting on whether the final result (for example, the sum of three dice) lands over or under a target line. In classic Tài Xỉu:
- “Under” (Xỉu) usually corresponds to low totals.
- “Over” (Tài) usually corresponds to high totals.
- In some rule sets, a specific “triple” (all three dice match) may void standard Over/Under bets or count as a house win—always check the posted rules on the table you’re playing.
The specifics can vary by table or game variant, but your ability to read odds correctly lets you spot value regardless of the exact rule set.
The Three Odds Formats You’ll See
Sunwin may display odds in different formats (depending on your settings/table). Get comfortable with all three so you can convert quickly and compare value.
Decimal Odds (e.g., 1.95)
- Payout = Stake × Decimal odds
- Net Profit = Stake × (Decimal odds − 1)
- Implied Probability = 1 ÷ Decimal odds
Example: If “Over” is 1.95 and you stake 1,000:
- Payout = 1,000 × 1.95 = 1,950
- Net Profit = 1,950 − 1,000 = 950
- Implied Probability = 1 ÷ 1.95 ≈ 51.28%
American Odds (e.g., -110 or +120)
- Negative odds (favorites): Amount you must stake to win 100 profit
Implied Probability = (|Odds|) ÷ (|Odds| + 100) - Positive odds (underdogs): Profit on a 100 stake
Implied Probability = 100 ÷ (Odds + 100)
Example: Over -110 means:
- Stake 110 to profit 100 (payout 210)
- Implied Probability = 110 ÷ (110 + 100) ≈ 52.38%
Example: Under +120 means:
- Stake 100 to profit 120 (payout 220)
- Implied Probability = 100 ÷ (120 + 100) ≈ 45.45%
Fractional Odds (e.g., 19/20, 6/5)
- Net Profit = Stake × (Numerator ÷ Denominator)
- Payout = Stake + Net Profit
- Implied Probability = Denominator ÷ (Numerator + Denominator)
Example: 19/20 ≈ 1.95 decimal; implied ≈ 51.28%.
Why Over and Under Often Have Different Prices
Beginners expect Over and Under to be priced the same. In reality, book margins and market flows create differences. If more players rush to the Over, the house may shade the Over price downward (less profit for you) and improve the Under price to attract balancing wagers.
In totals with near-50/50 outcomes, you’ll frequently see both sides priced near 1.90–1.98 (decimal) or -110 to -102 (American). That difference—small as it seems—is the house edge at work. Your job is to spot when a price deviates from fair value.
Implied Probability: The One Number That Rules Them All
Implied probability converts an odd into the chance the market is assigning to that event. Use it to:
- Compare prices across tables/formats
- Check if your own estimate is higher (value) or lower (no value)
- Track how lines move over time
Quick conversions:
- Decimal 2.00 → 50.00%
- Decimal 1.95 → 51.28%
- American -110 → 52.38%
- Fractional 19/20 → 51.28%
Pro tip: When both sides’ implied probabilities add up to more than 100%, the excess is the overround (house margin). The lower the overround, the “fairer” the market.
Reading a Sunwin Over/Under Board at a Glance
Step 1: Identify the Line
Look at the target total being offered. In dice-based Tài Xỉu, you’ll see an Over/Under threshold that splits results into “low” vs. “high” ranges. In some tables, multiple lines or side markets may be offered (e.g., specific totals, doubles, triples). Our focus here is the main Over/Under line.
Step 2: Read Both Prices
Check odds for Over and Under. Are they symmetrical (e.g., both near 1.95), or is one side priced better (e.g., Over 1.88 vs. Under 2.00)? That gap tells you where the book is leaning and where player money is flowing.
Step 3: Convert to Implied Probabilities
Use the quick formulas above. If Under 2.00 implies 50% but you believe Under hits 53% given recent trends, you’ve found potential value.
Step 4: Factor the Rules
Some Tài Xỉu rules state that triples (e.g., 1-1-1, 2-2-2, …, 6-6-6) are house wins or void standard Over/Under bets. That slightly reduces the true probability of the Over/Under outcomes versus a pure 50/50 split. The odds you see will already reflect this, but it’s smart to remember why markets rarely sit perfectly at even money.
Step 5: Time Your Entry
Odd boards move. If you track several rounds:
- A flood of Over bets might push Over to 1.85 and Under to 2.05.
- Waiting may improve your chosen side’s price—if you think money will keep pushing the other way.
Example Walkthroughs
Example A: Even-ish Market
- Over 1.94, Under 1.94
- Over implied ≈ 51.55%; Under implied ≈ 51.55%
- Combined ≈ 103.1% → ~3.1% overround
No clear bargain either way. You’d need a meaningful edge in your personal model (e.g., a read on dice patterns or volatility) to justify a play.
Example B: Shaded Over
- Over 1.88, Under 2.02
- Over implied ≈ 53.19%; Under implied ≈ 49.50%
- Combined ≈ 102.69% → ~2.69% overround
Here, the market is leaning Over (worse price). If your estimate says “Under is ≥51%,” Under 2.02 could be value.
Example C: American Odds Snapshot
- Over -115, Under -101
- Over implied ≈ 53.49%; Under implied ≈ 50.25%
- Combined ≈ 103.74%
Again, the book is taking a little more margin—leaning Over. If you prefer Under, -101 is relatively friendly compared to common -110 baselines.
Bankroll and Sizing: Make the Odds Work for You
Use a Unit System
Define a “unit” (e.g., 1% of bankroll) to standardize risk and reduce emotional over-betting. If you’re new, 0.5–1.0 units per play is sensible.
Kelly Criterion (Simplified)
If you can estimate a true win probability (p) and know the decimal odds (d), the simplified fraction of bankroll to wager is:
- Edge = p × d − 1
- Kelly Fraction = Edge ÷ (d − 1)
Example: Under 2.02 with p = 0.51
- Edge = 0.51 × 2.02 − 1 = 1.0302 − 1 = 0.0302 (3.02%)
- Kelly = 0.0302 ÷ 1.02 ≈ 2.96% of bankroll
Newer players often use half-Kelly or quarter-Kelly to reduce variance.
Track Closing Line Value (CLV)
If you bet at Under 2.02 and it later closes at Under 1.95, you “beat the closing line.” Over time, consistently getting better numbers than the final market tends to correlate with positive expected value.
Common Traps (and How to Avoid Them)
Chasing Losses
After a bad run, you’ll be tempted to double stakes. Don’t. Stick to your unit system. Emotional spikes are the enemy of long-term edge.
Ignoring the Overround
Two different tables might both list “nice” prices, but one could carry a higher margin. The table with a lower combined implied probability (closer to 100%) usually offers better long-term value.
Betting a Number, Not a Price
Saying “I always take Over” without regard to price is how bankrolls evaporate. The price determines expected value—not your preference.
Misreading Special Rules
Triples, void conditions, or alternate lines can change real probabilities. Scan the rules panel every time you sit down at a new table.
A Quick 10-Second Odds Checklist
- Line: What’s the current Over/Under threshold?
- Prices: What are Over and Under odds?
- Implied Prob: Convert both in your head (roughly is fine).
- Margin: Add implied probabilities—how big is the overround?
- Bias: Is the market shading one side? Why?
- Rules: Any triple/void quirks?
- Trend: Are prices moving? If so, which way?
- Model: Do you have a reason to believe your side is undervalued?
- Sizing: What’s the unit (or Kelly-scaled) stake?
- Log: Record the bet and the odds for CLV tracking.
Building a Simple Personal Model
You don’t need to be a statistician to get value from a model. Start small:
Track Results
Log each round’s outcome and the prices you saw. Over a few hundred rounds, you’ll find patterns—periods where markets shade one side, or specific tables with consistently tighter/larger margins.
Segment by Conditions
If you notice certain lobbies or time windows react differently (e.g., more aggressive price moves), tag your data. Even rough segmentation can highlight where you’ve historically done better.
Compare Your Estimates to Market
If your estimated probability differs from market implied probability by ≥2–3 percentage points, that might be a playable edge—especially if you can also secure a lower overround.
Frequently Asked Questions
Are Over and Under truly 50/50?
Not always. Depending on table rules (especially how triples are treated), the raw probabilities can deviate from a perfect coin flip. The odds you see incorporate those nuances, which is why prices are rarely exactly even.
Which odds format should I use?
Whichever you can convert quickly. Decimal is easiest for fast math; American is common if you’re used to sports markets. Learn all three so you’re never stuck.
How much should I stake per bet?
Start with small, consistent units (e.g., 0.5–1.0% of bankroll). Only consider Kelly-style sizing once you’ve collected data and can estimate your edge with some confidence.
What’s the fastest way to spot value?
Convert the price to implied probability, compare it to your estimate, and glance at the combined overround. If your edge survives after accounting for the margin—and you can still get the number—take it.
Conclusion: Turn Numbers into an Edge
Reading odds in Sunwin Over/Under isn’t about memorizing a few conversions; it’s about building habits that keep you disciplined and price-sensitive. Identify the line, convert the prices, check the margin, mind the rules, scale your stakes, and log everything. Over time, you’ll spot mispricings faster and avoid common traps.
Ready to put this into practice? Start by opening the odds board in tài xỉu sunwin and run through the 10-second checklist before every single wager. Keep refining your notes, tracking closing line value, and playing only when the price is on your side—the numbers will do the rest.
