Champion Pool Designer

Pick your role and add champions to your pool in the sidebar, then jump in:

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Explore your current pool

Improve your pool

Build a pool from scratch

Explore the meta

Patch notes

  • v0.2 — Patch 16.11 — data refresh + sortable coverage June 12, 2026 Playrates across all six rank brackets now come from patch 16.11, scraped over the full patch window — replacing the 16.9 data, which had only captured part of its cycle.

    The Matchup Coverage and Synergy Coverage heatmaps are now sortable: click a pool champ's name or icon to reorder the columns by that champ's own matchup or synergy Δs, best → worst. Click the champ again — or the gold ▼ by the bar axis — to restore the default top-X ordering.
  • v0.1 — Patch 16.9 — rank brackets May 7, 2026 Pick rates now ship for six rank brackets (Silver, Gold, Platinum, Emerald, Diamond, Master+) on patch 16.9. The "Pick-rate patch" control in the sidebar is now a Rank bracket selector — switching it re-weights matchup/synergy scoring with that bracket's playrates and reloads the strength-curve reference distribution to match. Default is Diamond.

    Heads up: historical patches (16.1–16.8) are no longer selectable. The app now ships only the current patch's data across the six rank brackets — past patches have been dropped.
+1.0 bold = your top-X best pool picks for that column +0.3 faint = other pool members (context) Cell color = Δ pp (winrate delta) Bar above = top-X mean z per column (drives sort) Click a pool champ's name to sort columns by their matchups

Pool redundancy

+1.0 bold = top-X best pool picks +0.3 faint = other pool members Cell color = Δ pp

Ranked pools

+1.0 bold = top-X best pool picks +0.3 faint = other pool members Cell color = Δ pp

Ranked candidates (click to preview — does not change your pool)

Individual Champ Compare

What each column means (click to collapse)
Total Overall, how similar is this champion to the one you picked? +1 = nearly identical playstyle profile, 0 = unrelated, −1 = total opposite. Matchup Do these two champs struggle into the same enemies and beat up the same enemies? High = same kinds of opponents counter them and the same kinds of opponents feed them. Negative = one's strong matchup is the other's bad matchup. Synergy Do they like the same kinds of teammates? High = same partners boost both. Negative = the things that make one champ shine make the other worse. Blind Δz Is this champ safer to blind-pick than the one you picked? Positive = more reliable across the board (fewer hard counters). Negative = more polarized — bigger swings, more matchup-dependent. Both Strong The top 3 matchups/teammates where both champs have a winrate edge. The cells where they both shine — pick either one into these. Both Weak The top 3 matchups/teammates where both champs lose winrate — their shared blind spots. If both your options struggle here, you need a third pick. Most Different The top 3 places these two champs disagree — one wins where the other loses. Useful for figuring out when to swap between them: if you're up against one of these matchups, the other champ is probably your better answer.

Most Similar Champions

Most Different Champions

Column definitions — detailed (click to collapse)
Total The average of the Matchup and Synergy correlation columns. Matchup Pearson correlation of the two champions' winrate-edge (Δ pp) vectors across every eligible opponent in all 5 roles. PR-weighted by opponent pick rate if the sidebar checkbox is on. Synergy Same correlation as Matchup, but over Δ pp with every eligible partner across the 4 other roles. Blind Δz The row champion's aggregate blindability z minus the selected champion's. Same z-scale as the Blindability tab; high = consistent across opponents and partners. Both Strong Cells where both Δ pp values are positive, sorted by min(Δ_selected, Δ_row) descending — biggest mutual upside first. Both Weak Cells where both Δ pp values are negative, sorted by max(Δ_selected, Δ_row) ascending — the cells where both champs are most in the red. Most Different Cells where the signs of the two Δ pp values are opposite, sorted by |Δ_selected − Δ_row| descending.
A "cell" in the last three columns is one matchup or synergy slot — e.g. vs SUP_Yuumi or w/ ADC_Lucian. Toggle Show individual deltas above the table to also see the raw winrate-edge numbers (the selected champ's, then the row champ's) inside each cell.
Driven by the live API — change PR floor, patch, or PR-weighted in the sidebar and this updates. Correlation is over each champion's delta-pp vector across every eligible matchup (or partner). Blindability is the same aggregate z used by the Blindability tab.

Playrate by Rank — patch 16.11

Stacked bars showing the share of role games each champion accounts for, side by side from Silver → Master+. Each bar sums to 100% by construction (champ games / total role games per bracket). Same-champion segments across consecutive ranks are connected by tinted ribbons so you can trace a pick's popularity across brackets.