Are these counters guaranteed in every patch?
No. OpenDota matchup data is historical public match data and should be used as draft context, not a patch-proof rule.
Free Dota 2 tool
Search a Dota 2 hero to find difficult public matchups, easier matchups, matchup game counts, and win-rate context from OpenDota.
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Review where the tool gets its data and what the result can and cannot establish.
No. OpenDota matchup data is historical public match data and should be used as draft context, not a patch-proof rule.
Low sample size, skill bracket differences, role changes, and patch timing can all make matchup win rates less stable.
No. It summarizes public hero matchup data. Draft fit, lane matchup, player comfort, and team composition still matter.
Search a hero and compare the matchups where that hero has the lowest and highest public win rates.