TDA is for problems where the "shape" of data contains critical information that traditional statistical or linear methods might miss. It is particularly effective for high-dimensional, noisy, and incomplete datasets: it identifies global patterns in data that do not follow simple linear trends.
In chess, it has already been used to
* identify skill classification of players without results
* classify styles of play by shape
* measure the stability of a position
* detect engine usage: engines have unique spatial distributions of pieces compared to human play
2. Graph Theory
Chess is a graph where pieces are nodes and their moves are edges. The method that has yielded the most promising results so far is "eigenvector centrality" - the same logic Google used for PageRank, and which has also been used to study which families were most powerful in Italian towns (the quality of the families connected to on the network graph turns out to be more important than the quantity). A piece with high "betweenness centrality" is pivotal because it lies on many shortest paths within the interaction network. Researchers have calculated the "fragility score" of various positions by summing the betweenness centrality values of all pieces currently under attack. A high score indicates a "tipping point" where the game is likely to transform drastically within a few moves. Fragility typically peaks around move 15–16 (ply 32), identifying the most critical moments of the middlegame. In approximately 60% of games, pawns are the key pieces with the highest betweenness centrality because they are central to the board's structure and frequently sacrificed. Knights are the next most common at 20%. Betweenness centrality is superior to simpler metrics like "node degree" (counting attackers/defenders) because it accounts for long-term consequences rather than just the next move.
Also, if we look hard at the flow network of the chess graph, we might be able to create an algorithm to identify a hidden equilibrium point, with the player that controls this "bridge" being the one that will win.
Conclusion: more and more lines of attack against chess are opening up and it's just a matter of time before she crumbles and reveals her innermost secrets to the world. Then all the people who currently say that chess cannot be solved because of its combinatorial complexity will look about the same as WWII encryption machine manufacturers look today.