I feel like the "immutability" refers more to the rules and gameplay mechanics of chess than the strategies. Certainly the strategies of chess evolve, but that

I feel like the "immutability" refers more to the rules and gameplay mechanics of chess than the strategies. Certainly the strategies of chess evolve, but that is a result of players developing new and different ways to play the game. This is opposed to a game like Magic the Gathering, Hearthstone or even DOTA 2 where the strategies change because the game itself is constantly being changed