Steam achievement notifications are now being shown immediately when unlocking an achievement.

• Minor improvements to lighting.
  
• Minor improvements to the color scheme of the pieces.
  
• It is now easier to join a friend's lobby through Steam Overlay. You can now do so from the main menu, without going to Online Game -> Steam -> Join Lobby.
  
• Fixed a bug: when exiting English puzzle 4 and then starting a local or PvE game, dark player had the first move even if the rules stated otherwise.
  
• Fixed a bug: when going from English puzzle 3 to English puzzle 4, the AI was making a move first even though it should not have.

I recently realized that people mostly leave everything default, including the ruleset.
That meant that the majority of you were playing the International ruleset, which is not beginner-friendly. So I switched the default one for PvE and local PvP, but in the networked PvP - erroneously - only the displayed name of the ruleset got changed.
From now on, when the Brazilian ruleset is selected in online multiplayer, it will actually launch a match that uses the Brazilian ruleset.