Should you counterpick or play your main?

What we measured

For every lane of every game we took the two players facing each other in the same role: which champion each was on, how many mastery points each had on it before the game, and who won.

• 44,916,375 lane matchups from 8,983,275 ranked solo queue games in North America, Europe West and Korea, September 1 to 24, 2026. Remakes are left out.
• A “main” is a champion the player had 100,000 to 1,000,000 mastery points on before the game. An “unfamiliar” champion is one with under 10,000, roughly the first ten games. The lane opponent always has 100,000 points or more on their own champion.
• A matchup’s counter effect is how much better a champion does in that lane matchup than the two champions’ overall win rates predict: the same kind of number the Counters page shows. “Holding the counter” means an effect of 2 points or more in your favour, “clearly countered” means 2 or more against you, and “even” means under 1 either way.
• The games were split in two at random. Counter effects were measured on one half and every win rate on this page on the other, so a matchup cannot look good here because of the same games that labelled it.
• Mastery was read before the game began, and the game’s result is used only as the result. About a fifth of player-games had no usable mastery reading and are left out.
• The 95% intervals treat every lane matchup as independent. A player who appears many times makes them slightly too narrow.

A counter is worth about three points; an unfamiliar champion costs about four

All ranks together, against an experienced lane opponent:

Holding the counter was worth 2.9 points to a main and 2.3 to a player new to the champion: about the same. Being new to the champion cost 4.1 points in an even matchup. So the unfamiliar champion at its best, holding the counter, still sat 1.7 points below the main in an ordinary matchup, and 1.2 above the main at its worst.

Against a one-trick, an opponent with more than a million points, every row is a little lower and the order stays the same: the unfamiliar counter won 47.2% and the main in an even matchup 49.2%.

The lower the rank, the more the main matters

A main’s counter is worth about three points at every rank. What changes is the price of an unfamiliar champion in an even matchup: 6.2 points in Iron, 4.0 in Gold and 2.7 in Diamond.

From Iron to Platinum the unfamiliar counter is clearly behind the main in an even matchup. In Emerald and Diamond the difference is under a point, small enough that it could be level. In no rank is it ahead.

Against a main that is itself clearly countered, the unfamiliar counter is behind in Iron, about level in Bronze and Silver, and one to two points ahead from Gold up. That is the one comparison the counter wins, and following the same player (see below) takes most of it back.

The counter is worth the same from the first games on

Splitting the unfamiliar group by mastery points: under 1,000 points, a player’s first couple of games on the champion, holding the counter was still worth 2.5 points. What is lower is the starting level: 44.5% in an even matchup, against 46.3% at 5,000 to 10,000 points.

A champion never played before has no mastery reading, so the very first game is not in this table.

Are counter numbers inflated by who plays the matchup?

A fair worry is that a matchup looks good because the players who choose it are specialists. The data says otherwise. Players in a favourable matchup were slightly less practised on the champion than its usual players, and that difference moves a matchup’s counter effect by about 3%.

Following the same player on the same champion across the matchups they met, a point of counter effect was worth 1.04 points of win rate; comparing different players, 0.99. The counter effect is about the matchup, not about who shows up for it.

What should a player do with this?

Learn the counter before you need it. A counter helps about as much as its number says, but it is added to how well you play the champion, and being new to a champion costs more than a counter gives back. The lower the rank, the more this holds.

The Counters page shows the counter effect of every lane matchup, and Champion Pool shows which of your own champions you win on.

What this cannot prove

• We cannot see pick order. A player who chose the counter on purpose and a player whose early pick happened to land in a good matchup are the same row.
• These are groups of players, not one player trying both options. In a separate check that followed the same players, an unfamiliar champion cost about two points more than a comparison between groups shows, so the unfamiliar counter looks better here than it is.
• We do not know why a player is on an unfamiliar champion. Autofill, a banned main and a deliberate counterpick all look the same.
• At higher ranks some low-mastery accounts belong to experienced players on new accounts, who win more than a true newcomer. Part of the narrowing with rank may be that; we did not separate it.
• Only the direct lane matchup is counted, same role against same role. A jungler against the enemy laners, or a support against the enemy carry, is not in it.
• “Holding the counter” pools every matchup with an effect of 2 points or more, 2.9 on average. A harder counter is worth more, and one champion can be easier to pick up than another.
• The study covers 24 days of September 2026. A balance patch can move any single matchup.