Build better DFS lineups before lock.
Cobra Sim gives serious DFS players one clean workspace for slates, salary files, reserved entries, sport rules, lineup generation, entry edits, and DraftKings-ready exports.
Preserve contest rows, entry IDs, roster slots, and file structure so your work survives the final upload step.
Generate new lineups or edit reserved entries with the same shared lineup engine and the same slate rules.
Move from slate selection to lineup review to export without digging through scattered files and one-off scripts.
One workflow from upload to export.
Cobra Sim is built around the parts that decide whether a DFS tool is usable under pressure: clean files, correct slate mapping, protected entries, fast review, and reliable CSV output.
Upload DKEntries.csv, keep existing contest reservations intact, and rebuild lineups without destroying the parts DraftKings needs.
Keep salary files, entry files, run outputs, and exports organized by platform, sport, mode, date, and contest.
Handle roster construction, salary floors, exposure, stacking, captain rules, and slate-specific risk without splitting the product apart.
Fail loudly when a lineup, slot, duplicate, salary rule, or CSV shape could create an invalid upload.
Built for the DFS menu, not a single slate type.
The core workflow stays consistent while each sport can carry the rules that actually matter: roster slots, salary behavior, exposure limits, correlation, stacking, captain logic, and contest format.
Stop wrestling files. Start working lineups.
Use Cobra Sim to keep the workflow tight: choose the slate, run the rules, review the builds, protect the entries, and export a file DraftKings can accept.