Review your games
This brings Lichess-style engine review to a game with hidden pieces and luck. We adapt Lichess’s accuracy and move-grading methods to jieqi, measuring the quality of your decisions separately from what each reveal gave you.
1. Finish a game and open Review game
When a game ends, click Review game below the move list. You can step through the whole game, revisit a position, and try a different continuation.
2. Request computer analysis
Open the Computer analysis tab, then click Request computer analysis. Sign in to request a new analysis; anyone can read one that is already available. It may take a few minutes to finish.
3. Find the moves to learn from
The graph shows how the game changed. Each player gets an accuracy score, and inaccuracies, mistakes, and blunders are marked in the move list. Select a marked move to see the better move the engine recommends.
Good decisions and lucky flips are different
A move can be a good choice and still reveal an unlucky piece. The move-quality glyph grades your choice before the reveal. The die badge shows how much better or worse the revealed piece was than the pieces you could have drawn.
Move-quality marks grade the choice, independently of the reveal.
Violet dice mean an unlucky reveal, grey means close to the expected outcome, and teal means lucky. More pips and a deeper colour mean a bigger swing.
Illustrative examples. The same revealed piece can be lucky or unlucky depending on the position.
When a different move was significantly better, the review shows that best move as advice. You can turn on alternatives to explore more candidates. Your accuracy measures the choices alone, so a lucky flip cannot flatter it and an unlucky one cannot spoil it.
Try a different line from your game
Return to a position in your review and play a different move on the board. Your variation appears alongside the original game. Switch on the browser engine to compare continuations from that position, with no server queue. You are exploring the game you just played, with its actual reveals.
The engine
Pikafish has eight levels. The seven easier levels limit its search and let it choose weaker moves; Level 8 uses the full search budget. We measure the steps by playing the bots against one another and against a random-move baseline. How we built the ladder explains the levels.
AB-JChess earned its place above Pikafish by winning their 400-game match, 248 to 136. Read about that champion, or see the current bots and ratings for the latest challengers. Every bot plays from the information its side is allowed to see; it is never given the hidden deal.
What you get
| On Mistboard | |
|---|---|
| Play the engine or a friend | Free, no account |
| Full-game analysis | Sign in to request; available to all to read |
| Luck measured separately | Every flip priced |
| Explore your own games | Browser engine, no queue |
| Studies with your own deals | Yes |
| Open-source engine | Yes |
| Rated ladder | Open, signed in |
Common questions
- What is jieqi?
- Xiangqi with every piece except the general face-down. A piece moves as whatever normally starts on its square, then turns over and keeps that identity. It is also known as cờ úp in Vietnamese.
- How is jieqi different from xiangqi?
- Same board, same pieces, same moves, same goal. You just do not know which piece is which, so about half your moves flip one over and find out.
- Is jieqi just luck?
- The flips are random; what you do with them is not. Your accuracy score is built only from your choices, so a good draw cannot flatter it and a bad one cannot spoil it.
- Can a computer play jieqi well?
- Yes. Mistboard offers a range of bot strengths, from beginner levels to strong engines. Start with Level 1, then choose a harder opponent as you improve.
- Can the engine see my hidden pieces?
- No. It receives only the information its side is allowed to see. It is never told the hidden deal.
- Is the shuffle fair?
- The deal is random, made on the server, and told to nobody: not you, not your opponent, not the engine.
- Where can I play jieqi online for free?
- Here, against the engine or a friend. Casual games need no account and nothing to install. You can replay finished games freely; sign in to request full-game engine analysis.