This week we've been reindexing games for the opening explorer.
As a trivial example, look at 1. Nf3 Nf6. Now let's say your opponent makes the mistake to go 2. Ng1 back. Previously the explorer would show ways to most reached position (2... Ng8 also back) instead of ways to punish the mistake.
Now the explorer will only show moves that have actually been played in the given position.
Other than that you might notice it's a bit faster now, especially when quickly scrolling through the opening phase of a game.
As a trivial example, look at 1. Nf3 Nf6. Now let's say your opponent makes the mistake to go 2. Ng1 back. Previously the explorer would show ways to most reached position (2... Ng8 also back) instead of ways to punish the mistake.
Now the explorer will only show moves that have actually been played in the given position.
Other than that you might notice it's a bit faster now, especially when quickly scrolling through the opening phase of a game.