Breakdown of İyi ki şahı korumaktan yana bir tercih yaptın.
bir
a / an
yapmak
to do / to make
korumak
to protect
iyi ki
fortunately / it is a good thing that
Questions & Answers about İyi ki şahı korumaktan yana bir tercih yaptın.
How does the grammar of korumaktan yana work here?
The postposition yana means "in favor of" or "on the side of," and it always requires the preceding word to be in the ablative case (-DAn). Here, the verbal noun korumak (to protect) takes the ablative suffix -tan, forming korumaktan yana (in favor of protecting).
Why does şah have the accusative suffix -ı if the main verb is yaptın?
The accusative -ı belongs to korumak, not yaptın. Even though korumak (to protect) has a case ending attached to it (-tan), it still acts as a verb internally and takes its own specific direct object. You are protecting the specific king, so it becomes şahı.
Is şah the usual Turkish word for "king"?
It depends on the context. şah is primarily used for the "king" piece in chess, or historically for Persian monarchs. If you are talking about a standard European king, the word is kral. Given the phrasing, this sentence is very likely about a chess game.
Could I just say şahı korumayı tercih ettin instead?