Game Day Control Center
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Immutable pregame locks0
Graded winner accuracy—
70%+ estimated picks—
Toss-up / unrated0
Quick Game Board
Official pregame picks never change after kickoff
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JAMN 4.1.0 — independent mathematical rebuild. Chronological train/test research used 90,487 eligible historical replays across seven sports. Approved new winner model: College FB 63.57% → 67.22%, Men CBB 66.94% → 71.60%, Women CBB 70.78% → 75.69% (later unseen games). NFL, NBA, WNBA and MLB stay on the old official model until improvement is demonstrated. All seven can be explored in the replay lab; this is not a betting-profit claim.
Historical Kickoff Replay & Math Lab
Works after games start or finishRebuild any matchup: Choose a date above, refresh the games, then press Rebuild kickoff math on any game card. This reconstructs a score-based prediction using only earlier historical finals, even if the game is live or already final. By default compare the original model with a genuinely different 4.1 statistical model: scoring history, changing team strength, last-five and last-ten form, and historical margin. Sliders adjust the inputs for a what-if replay. The original official pregame lock is never changed, and a retrospective result is not counted as a verified pregame pick.
Select a game above to reconstruct its pre-kickoff scoring model.
Compare new model against old model: the sliders begin at the same values, so both predictions initially match. Move a slider or tap Apply earlier bias (manual experiment). No pregame lock is overwritten.
No game selected yet. Historic replay does not need to have been saved before kickoff.
Stats used: historical completed scores only, no retroactive injuries or lineups.
Re-test revised mathematics against cached historical games
Uses previously downloaded full-league historical finals on this device; no new historical data is fabricated. Run Maximum History first if cache is empty.
Results by Sport — Verified Pregame Only
| Sport | W | L | Win % |
|---|
Historical Backtesting — Maximum History
Separate from locked pregame picksScan full league scoreboards across multiple seasons, not just the two teams in tonight's matchup. Every simulated prediction is calculated using games from earlier dates only; final scores are never fed into their own predictions. Replays with insufficient prior history are excluded. Internet access and an open app are required. ESPN date-range requests currently return HTTP 400; this version uses monthly requests and verified daily fallback. Historical data coverage is checked before calibration.
Ready: select a sport and number of seasons. Successful months and individual days are cached on this phone for resumption. For best results, start with College Football and 4 seasons, then increase coverage. A 7-sport/10-season scan can take a long time.
No testing yet.
Integrity & Learning
Important: Predictions are generated only from confirmed prior final scores, and for official verified locks only while the game is still marked pregame. Retrospective forecasts can be reconstructed for games already started or finished, saved as WHAT-IF scenarios, and never counted as original pregame predictions. Forecasted winners are shown even when confidence is withheld. True near-ties are marked TOSS-UP; missing real data still prevents a prediction. A projected winner does not establish a betting advantage. Probabilities are provisional model estimates, not independently calibrated betting probabilities. The original pregame lock is never updated using live or final scores. Completed games are graded and retained for later chronological analysis; the app does not automatically retrain on its own errors mid-game. Historical-data feeds are unofficial and can fail. Full-league backtests are performed only after fetching actual completed games online, not pre-filled with made-up wins. A high win rate does not prove a betting advantage. Automatic updates run only while this page is open and active on your iPhone.
Older JAMN files import into a separate historical archive, not the official 4.0 record. Archived records: 0. Download backups regularly to your iPhone Files.
Older JAMN files import into a separate historical archive, not the official 4.0 record. Archived records: 0. Download backups regularly to your iPhone Files.