What is Free Energy?

So, to put it simply, by less energy you mean negative energy? When looking for an answer to the puzzle should I not only focus on the ammount of possible bonds I am allowed to make, but also on the quantity of free energy these release, and keep it on the negative side?
I’m having some issues when it comes to this particular point. Could someone please elaborate on the relation calories/score?

Hi 274111! Yes, energy should be negative for the puzzle to solve. For most of the puzzles, you don’t need to pay special attention to the energy.

To quote BigBloto:

Kcal mainly useful for troubleshooting problems by comparing kcal # in natural mode to kcal # in target mode

For more explanation on Negative energy also called Free energy, check out this WIKI page: http://eternawiki.org/wiki/index.php5…

The change in free energy that occurs when a compound is formed from its elements in their most thermodynamically stable states at standard-state conditions.

Great!