A very interesting explanation of literally “the best move in chess” is given by Andrew Soltis in his book “What It Takes to Become a Chess Master”
2012
“… going from good at tactics to great at tactics … doesn’t translate into much greater strength. …
You need a relatively good memory to reach average strength.
But a much better memory isn’t going to make you a master. …
there’s a powerful law of diminishing returns in chess calculation, …

Your rating may have been steadily rising when suddenly it stops. …

One explanation for the wall is that most players got to where they are by learning how to not lose. …

Mastering chess … requires a new set of skills and traits. …

Many of these attributes are kinds of know-how, such as understanding when to change the pawn structure or what a positionally won game looks like and how to deal with it.
Some are habits, like always looking for targets.

Others are refined senses, like recognising a critical middle game moment or feeling when time is on your side and when it isn’t. …”

The analogy of a Great Chess Master and of a person participating in the Game of Life is of great inspiration.

Viktor Frankl wrote that we should follow our conscience “half sure and whole hearted” which means that logic will not be enough, exactly like choosing the best move in chess.

An inner heart feeling is the major indication of choosing the right “move” to a situation.

As Soltis notes above “most players got to where they are by leaning how to not lose…and they suddenly stop…”
In Life a person’s choice should not be motivated for a profit or for a not loss… This is a devaluating mentality that most times ends in a literal “loss”.
“Mastering chess requires a new set of skills and traits” equally in Life, modification of attitudes is of great importance for a person to make the right choices.
Then Soltis describes the attributes of know-how and the habits, that could be an analogy of a person’s experiential values , what a player has taken from the world and creative values, what a person is meant to offer to the world.

“Others are refined senses” Soltis writes… now he is addressing to the voice of conscience, the spiritual element, the recognition of the meaning of the moment and a decision a person should take considering the meaningful possibilities given in a certain time and space moment.