My Favorite Opponent

Playing a chess bot is only useful if you use it right. Here's how to choose difficulty, review games, and turn bot practice into real rating gains.

I have a distinct memory of the first time I played against a chess computer. It wasn't on a screen. It was a beige plastic board my dad bought in the mid-90s, with pressure-sensitive squares and a tinny little voice that announced its moves. It felt like playing a ghost. There was no one across from me to share a look with, no satisfying clack of a captured piece, just this strange, lonely calculation.

For years, that's how I thought of them: a sad substitute for the real thing. But my relationship with computer opponents has changed. I’ve learned to appreciate them for what they are—the most patient, exacting, and available sparring partners you could ever ask for.

What We Talk About When We Talk About Bots

When people talk about playing a chess bot, they’re often talking about two different things. There's the interface, the personality—the avatar named "Celine" who plays aggressively, or "Leo" who prefers quiet positional games. This is the bot.

Underneath that is the chess engine, the powerful calculator doing the heavy lifting. You’ve probably heard of the big ones, like Stockfish or Leela Chess Zero. An engine is pure mathematics. It evaluates millions of positions a second and doesn’t care one bit about your feelings. A bot, in theory, is the styled silhouette draped over that powerful frame, giving it a shape and character we can play against.

I don't pretend to understand the intricate code behind them. I just know how it feels to play against them, and how to use that feeling to improve my own game.

A human opponent gets tired. They have a bad day. They get cocky when they're winning or nervous when they're losing. They might play a move because it "looks scary," even if it's not the best. They blunder.

The Endgame Journal collects our writing on openings, tactics, endgames, and the habits that separate players who improve from players who plateau. Every article is written by people who teach chess, not by a content farm.

Chess Bot Practice: How to Actually Improve | Endgame Society