LoL Pool Coverage

Find the holes in your champion pool. Pick a lane and the champions you play — see which meta picks beat you, who to add, who to cut, and what's safe to blind-pick. Data from the live patch.

How the numbers work

Everything is built from one number per matchup: Δ2 — a champion's win-rate delta in a specific matchup. Positive means that champion is favored; negative means they're behind.

Patch weighting. We blend Δ2 across recent patches so the numbers reflect the live meta without overreacting to one patch's noise. The current patch counts at full strength; we discount each older patch by a further 15% — 85% for last patch, 72% for two patches ago, 61% for three, and so on (0.85 per step), out to 20 patches. The exact patches in today's blend and their weights are listed in the footer and update each week as new data lands.

We compare your pool against the lane's counter pool: every champion played often enough to matter (above your Min PR% threshold), minus anything you've banned and minus your own picks.

  • Best answer & the main buffer — for each threat we take your best Δ2 across the pool; if that answer is a champion you've marked as a main, it gets a +1 buffer (you play it better than the average sample). That's how Worst pool matchups ranks threats and picks the Best answer champion — the Δ2 columns show each of your champions' actual matchup, so a negative one there means that pick loses.
  • Best-adds score — for a champion you don't own, how much coverage they'd add. We weight each threat they'd newly answer by how common it is (its pickrate), so beating popular meta picks counts for more. Higher = a bigger upgrade to your pool.
  • Cut "unique value" — how much coverage you'd lose by dropping a pool member: the threats only they answer, weighted by pickrate. A low number means someone else has those matchups covered — safe to cut.
  • Blind score — the risk of locking a champion in before seeing the enemy. It sums up every matchup that champion loses, each weighted by how often you'd run into it. It's a negative number; less negative (closer to zero) is safer to blind.
  • Usage % — roughly how often you'd actually play each champion. We assume you blind-pick your safest champion on blind games and your best counter on counter-pick games, then split by your blind-pick rate.
  • Cross-role & the comp simulation — League is 5v5, so you can add an enemy role (e.g. jungle) and its meta picks join the threat lists. Best adds then becomes a pickrate-weighted simulation of every enemy comp: it combines each champ's matchups across the roles by multiplying the odds (so good-vs-their-top but bad-vs-their-jungle nets out — e.g. Malphite into Yasuo top + Sylas jungle) and ranks adds by how much they raise your best-pick win rate, counting only the comps where they'd actually be your pick. The draft assistant uses the same combine across up to five named enemies.

Δ2 is from the champion's own perspective. Match data is sampled, so treat small differences as noise — the sliders let you raise the pickrate and sample-size thresholds to filter out thin data.

Your pool

    ★ marks a main (gets the +Δ2 buffer) · × removes.

    Settings

      Worst pool matchups

      Meta picks your pool handles worst, ranked by your best available answer. A dimmed value with * is a thin sample (under 200 games) — treat it as unreliable.

      Best adds

      Champions that would most improve your coverage if you learned them.

      Cut analysis

      How much each pool member uniquely contributes — the lowest is safest to drop.

      Blind safety

      How risky each champ in your pool is to lock in before seeing the enemy.

      Best blind picks

      The safest first-picks in this lane you don't play yet — when you blind-pick you can't dodge your counters, so only the bad matchups matter. The risk number is each champ's pickrate-weighted average Δ2 across only its losing matchups (wins ignored); closer to 0 = safer. Click one to add it.

      Usage simulation

      Roughly how often you'd play each champ across blind and counter picks.