did-you-kno:

When you can’t make a decision
because you’ve overanalyzed the pros
and cons to the point that you’re too
overwhelmed to come to a rational
conclusion and therefore fail to make
any decisions at all, you have
‘analysis paralysis’. Source Source 2 Source 3

In chess, this is referred to as Kotov Syndrome (where a player thinks
so far ahead that they run out of time and make a bad move), and is
partly the reason chess matches have game clocks and time penalties.