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Oddyssey Daily Contest

Oddyssey is Predinex's daily parlay betting game where players predict outcomes across exactly 10 curated matches. Unlike traditional prediction games, Oddyssey uses a multiplicative odds-based scoring system that rewards both accuracy and backing higher-risk outcomes.

🎮 Game Overview​

What is Oddyssey?​

Oddyssey is a daily prediction contest where players:

  • Must predict outcomes for all 10 daily matches (no partial slips)
  • Choose between Moneyline (1X2) and Over/Under markets per match
  • Compete for daily prizes using odds-multiplied scoring
  • Need minimum 5 correct predictions to qualify for leaderboard

Core Mechanics​

  • Entry Fee: Fixed amount in native BNB (set by contract)
  • All-or-Nothing: Must predict all 10 matches in each slip
  • Multiple Slips: No limit on slips per player per day
  • Parlay Scoring: Odds multiply together for correct predictions

🏆 Game Structure​

Daily Cycle​

📅 24-Hour Periods​

  • Cycle Start: Oracle sets 10 matches with odds
  • Betting Window: Until 1 minute before first match starts
  • Match Resolution: Throughout the day as events complete
  • Scoring: Players evaluate their own slips after cycle resolves
  • Prize Claims: Available after all slips evaluated or 24-hour grace period

⚽ Match Selection​

  • Oracle curates exactly 10 matches daily
  • Each match offers both Moneyline and Over/Under markets
  • Mix of different sports and leagues
  • All matches must have odds set before cycle starts

Slip Requirements​

📝 Mandatory Full Slips​

  • Required Predictions: All 10 matches (cannot skip any)
  • Market Choice: Pick Moneyline OR Over/Under for each match
  • Single Entry Fee: Pay in native BNB only
  • Odds Locking: Odds fixed at time of slip placement

🎯 Prediction Options Per Match​

Moneyline (1X2):

  • Home Win ("1")
  • Draw ("X") - where applicable
  • Away Win ("2")

Over/Under:

  • Over - Total score above the line
  • Under - Total score below the line

📊 Scoring System​

Odds-Multiplicative Scoring​

Unlike simple point-based systems, Oddyssey uses parlay-style scoring where odds multiply:

🧮 Score Calculation​

Starting Score = 1000 (ODDS_SCALING_FACTOR)

For each CORRECT prediction:
Score = Score × (Selected Odds ÷ 1000)

Final Score = Accumulated Score
If any prediction wrong: Score = 0 (traditional parlay)

📈 Example Calculation​

Match 1: Home Win (1.5x odds) ✅ CORRECT
Match 2: Over 2.5 (2.0x odds) ✅ CORRECT  
Match 3: Away Win (3.0x odds) ❌ WRONG
... other matches

Score = 1000 × 1.5 × 2.0 = 3000 points
(Would be 0 in traditional parlay, but Oddyssey scores partial success)

Leaderboard Qualification​

⭐ Minimum Requirements​

  • At least 5 correct predictions to qualify for daily leaderboard
  • Score tiebreaker: Higher correct count wins if scores equal
  • Top 5 only: Daily leaderboard limited to 5 positions

💰 Prize Distribution​

Daily Prize Pool​

🏆 Top 5 Prize Structure​

  • 1st Place: 40% of daily pool
  • 2nd Place: 30% of daily pool
  • 3rd Place: 20% of daily pool
  • 4th Place: 5% of daily pool
  • 5th Place: 5% of daily pool

💎 Pool Sources​

  • Entry Fees: All daily entry fees (minus dev fee)
  • Rollover Prizes: Unclaimed prizes from previous days
  • No External Additions: Pure player-funded pools

🔄 Prize Rollover System​

  • If no player achieves 5+ correct predictions: entire pool rolls to next day
  • 5% rollover fee taken for development wallet
  • Can create large accumulated pools over multiple days

Claiming Process​

⏰ Claim Timing​

  • Standard: Claims available 24 hours after cycle resolution
  • Early Unlock: Available immediately if all slips evaluated
  • No Expiration: Prizes don't expire once claimable

💸 Prize Payouts​

  • 5% dev fee deducted from prize before payout
  • Native BNB payments only
  • One claim per position: Cannot win multiple positions

🎯 Strategic Elements​

Risk vs. Reward Balance​

🧠 High-Odds Strategy​

  • Higher Risk: Backing underdogs and overs/unders
  • Higher Reward: Odds multiply to create massive scores
  • Perfect Example: 5 correct predictions at 3.0x each = 243,000 points

🛡️ Conservative Strategy​

  • Lower Risk: Backing favorites with low odds
  • Steady Scoring: Consistent but lower point totals
  • Example: 8 correct predictions at 1.2x each ≈ 4,300 points

Market Selection Tactics​

⚖️ Moneyline vs Over/Under​

  • Moneyline: Often more predictable, lower odds
  • Over/Under: Can offer value bets, weather/pace dependent
  • Mix Strategy: Combine both for optimal risk/reward

🔍 Odds Analysis​

  • Value Hunting: Find markets where odds seem generous
  • Correlation Awareness: Avoid related outcomes across matches
  • Line Shopping: Compare with external sportsbooks for edge

📱 Technical Implementation​

Smart Contract Features​

🔒 Security Measures​

  • Odds Verification: Must match oracle-provided odds exactly
  • Match Validation: Predictions must be for exact daily matches
  • Reentrancy Protection: Safe prize claiming and slip placement

⛽ Gas Optimization​

  • Batch Operations: Single transaction for full slip
  • Storage Efficiency: Packed structs for gas savings
  • Event Indexing: Efficient tracking of player activity

Oracle Integration​

📡 Match Management​

  • Daily Setup: Oracle provides 10 matches with all odds
  • Result Reporting: Oracle resolves all match outcomes
  • Timing Control: Oracle sets betting windows and cycle transitions

🎲 Fair Play​

  • Pre-committed Odds: Cannot change after cycle starts
  • Transparent Results: All match results publicly verifiable
  • Automated Scoring: No human intervention in score calculation

🚀 Advanced Features​

Multiple Slip Strategy​

🎯 Portfolio Approach​

  • Diversification: Submit multiple slips with different risk profiles
  • Hedge Betting: Cover different scenarios across slips
  • Bankroll Management: Size entries based on confidence

📊 Correlation Analysis​

  • Independent Events: Look for uncorrelated match outcomes
  • League Knowledge: Leverage expertise in specific competitions
  • Weather/Venue: Factor external conditions into Over/Under bets

Long-term Success​

📈 Player Development​

  • Track Record: Build reputation through consistent performance
  • Market Expertise: Develop specialization in certain bet types
  • Bankroll Growth: Compound winnings through reinvestment

🏆 Competitive Edge​

  • Early Betting: Get slips in before closing windows
  • Information Advantage: Use latest injury/weather updates
  • Psychological Factors: Understand when markets overreact

💡 Key Differences from Traditional Betting​

Parlay-Style Innovation​

  • Partial Success Rewarded: Unlike traditional parlays, getting some picks right still scores points
  • Odds-Based Scoring: Rewards taking calculated risks on higher odds
  • Minimum Threshold: Must hit 5+ correct to qualify, encouraging thoughtful selection

Community Competition​

  • Fixed Entry: Everyone pays same amount, creating fair competition
  • Transparent Leaderboard: See exactly how scoring works
  • Daily Reset: Fresh start every 24 hours regardless of previous performance

Oddyssey rewards both accuracy and smart risk-taking. Success comes from finding the right balance between backing likely outcomes and taking calculated risks on higher-odds selections.