Turn your review into a useful next move.
You do not need to understand an entire game at once. Start with one choice, compare what each discard leaves behind, and take one idea into your next hand.
1. Choose your seat and a decision
Open a completed Riichi game in Analyze, or try Explore an example. Choose your player under Reviewing, then select Review my decisions. The report studies the recorded choices from that seat.
The hand display marks the tile you played and the suggested tile. Both are tiles to discard, not tiles to collect. If the same tile is marked Both, the engine chose the same discard as you.
2. Read the percentage as engine agreement
Engine agreement measures how often your compared discard choices matched the engine. For example, 8 matches from 10 compared discards gives 80% agreement. A forced discard or a missing evaluation is not counted as a comparison.
The headline percentage is for the selected hand and player. It is not your win probability, rating, or a calibrated measure of playing accuracy. Even 100% agreement means matching this engine's choices, not proof of perfect play.
3. Look at the tiles each choice keeps
The explanation compares how far each remaining hand is from a ready shape, then shows tiles that improve it. A ready shape needs a winning tile; it still needs the conditions for a legal Riichi win.
A helpful-tile count measures unseen copies of those improving tiles. Some may be in an opponent's hand or the dead wall, so the count is not a promise or a draw probability.
Compare helpful-copy counts only when the shapes are equally close to ready. A choice that moves the hand farther from ready is labelled separately instead of being shown as zero loss.
4. Use the map to find a study moment
Same means your discard matched. Explore means the engine preferred another tile: it is an invitation to compare, not an automatic mistake grade. Forced means there was no meaningful choice to compare.
Waiting and No result mean a comparison is not available. These are not zero scores. The engine considers the selected player's hand and the public information at that moment; revealing opponents in the replay does not give it their concealed tiles.
5. Save one idea, then play again
Use Save this moment to keep a position and a short note, such as Keep a two-sided run when both choices leave me equally close to ready. Return later and explain the choice in your own words.
Defence, hand value, yaku and the score situation can change what a good discard looks like. The current majiang-ai review is a study aid. Use its suggestions to ask better questions, and compare difficult positions with an experienced player.