That wouldn't work as the speed at which the engine runs is not deterministic. Engines can be configured to limit search to a certain depth, which will produce

That wouldn't work as the speed at which the engine runs is not deterministic. Engines can be configured to limit search to a certain depth, which will produce a result after every branch has reached the limit or been pruned. That process will vary in time but be deterministic. Recent neural based engines tend to not be deterministic, especially if ran multi-threaded.