For what that's worth, Stockfish 11 gives
Rh2 as +2.6
Kb4 as +2.2
Bxc7 as +0.6
other moves as 0.0
on my machine at depth 45 (will be updating this answer while it digs deeper). Rh2 and Kb4 occasionally switch positions as #1 and #2, so it's still unclear which one of these is truly best. Bxc7 surely isn't, however, at least if you believe Stockfish.
Houdini is severely weaker than LC0. I have seen their evaulations of positions, such as in the Salvio Gambit, which Houdini evaluates as only slightly worse for White(clearly not true), where LC0 states that Black has a sizeable advantage.
Thus, it is more likely that Leela had played the best move. We cannot know for sure until we prove a forced win for ...
Try the chess.com website. They have plenty of resources available. They also have a fully trained neural net which evaluated and scores your games with the aim to improve the player and facilitate their learning process.
Well i usually play with stockfish on my mobile to sharpen my chess skills. I am now good at chess playing. My opening (as far as I think) is one of the best in the world. I never played officaly against any grandmaster but informally i have played against a state level champion (Bihar, India) i beat him easily in both the games (on a train journey).
I tried ...
I think that when you started a new game you accidentally choose the Variant "Suicide" or "Losers". (It might be preselected now that you have selected it once.)
Why would this explain the situation?
In these Variations of chess (you might know them as antichess, the losing game, giveaway chess, suicide chess, killer chess, must-kill, ...
Tim Krabbe discusses this in his website (see section 328).
It's an old post - dating to 2006 - so it's certainly possible. However 2006 was also a long time ago. Since then engines have gotten more familiar with the rules, and all the top engines I'm aware of are aware of the 50-move rule. 493 moves is very long, but it should still be fairly trivial to get ...