We should be aiming to solve chess, but we are not even trying.
If the complexity of chess is finite this is possible.
Chess AI have become so good that maybe there is no more progress to be made.
We must abandon the concept of "valuation".
Here is the criterium for solving chess.
A chess engine is a constant (or bounded) time, (and memory bounded) function f which takes any position and return either 1 "white win", 0 "draw", -1 "white lose".
A chess engine solve chess if we can't find any violation in the Bellman equation :
f(gamestate) = max over legal moves of ( -f(gamestate+move) ) if there are legal moves or f(gamestate) = result if there are no legal moves
This function f can be encoded either by a neural network or some code, but it must be computable in constant (or bounded) time.
The whole problem of solving chess is now simplified to mining the gamestate space for counter examples.
Like in math you can conjecture that your chess engine has solved the game and it stands until someone else find a violation of your game engine (either it doesn't compute in bounded time, or the bellman equation is invalid).
To verify a chess engine you can just sample a random gamestate, or a known to be difficult gamestate and check if the equation holds, that's at most max number of legal moves + 1, function evaluation.
You can try applying this concept to simple games like tic-tac-toe, or trying to compress endgame table with a neural network.
We can find such a candidate function by training a neural network by minimizing the current expected number of violation in the bellman equation over various dataset of gamestate. Once we "grok" it to zero we are done. To soften the problem you can train an auxilliary continuous function g which output the probability of 1, 0, or -1 (with a softmax) and add a discount factor like in Reinforcement Learning, but the final result is the discrete argmax of it (like in "deterministic policy gradient") with no discount factor.
Once you have this finite time oracle, playing chess is just wandering along the graph of drawable position to push your adversary into a position where his engine will have a violation of the bellman equation aka a mis-evaluation of the position where if he goes into it you will get into the winnable positions where you stay until the end. (Not all violations can be exploited as the adversary can sometime avoid going into "uncertain" positions).
A simpler (less strong) chess strategy may avoid going into "uncertain" positions as long as the position is unreachable because previous legal positions have a preferred choice. (4 state logic with win, draw, lose, uncertain). Or ordered list of moves. They make the problem easier but complexify the corresponding bellman equation.
So the game becomes once again exploring the space of "drawable" game positions in order to find positions which the adversary can't escape going into a uncertain (and losing) position. Aka playing the adversary and not the board which is an harder problem except if the adversary can play perfectly. Aka playing for the win.