I think that comes from the way they can "learn" the game. I don't think more modern models rely on the knowledge of how many pieces there are in the game, probably they model it as given these pieces in this grid table, and rules for each piece and player actions, how do you reduce the state of the table to one where the opposing player has 0 kings (the rules probably can just be the engine replying invalid move don't even need to be stipulated, would be my guess). Then you could generalize it to any sized grid, with how many pieces you wanted, even 2 or more kings per side. At least that's how I imagine it to go or how I would try to do it.
To be honest haven't played chess for years - I did MtG for a while even as I got older but then it just annoyed me and haven't played in years - it was when I started working on my own take on tcg's
To be honest haven't played chess for years - I did MtG for a while even as I got older but then it just annoyed me and haven't played in years - it was when I started working on my own take on tcg's