Guide
How to read a shogi game analysis
Last updated: October 21, 2026
When Shogi Analysis analyzes a game, the Analysis screen shows the win-rate graph, marks on the board, the move played next to the best move, and the candidate moves. All numbers and graphs are from your side (the player you chose when adding the game). This page explains how to read each of them.
What is the difference between win rate and eval?
The eval is the engine’s score for how favorable a position is, and the win rate is converted from the eval. An eval of 0 is a 50% win rate, +600 is about 73%, and +2000 is about 97% (negative values mirror this: −600 is about 27%).
The larger the eval, the closer the win rate gets to 100%, and the less it moves. That’s why, when one side is already far ahead, the eval is also used to judge mistakes (see “How are inaccuracies, mistakes and blunders decided?” below).
How do I read the win-rate graph?
The graph above the board shows your win rate after every move as a line. A big drop in the line is a move that lost a lot of win rate. Tap the graph to jump to that position.
Each row in the game list also shows a small win-rate graph and a mark for blunders, so you can pick which game to review from the list.
What do the marks on the board (◎ ○ △ ×) mean?
The mark shows whether the last move matched the best move. It appears at the top right of the square the piece moved to.
| ◎ | Matches the best move |
|---|---|
| ○ | Not the best move, but the win rate dropped by less than 5 points |
| △ (blue) | Inaccuracy — the win rate dropped by 5 points or more |
| △ (red) | Mistake — the win rate dropped by 10 points or more |
| × | Blunder — the win rate dropped by 20 points or more |
Your opponent’s moves get marks too, judged from their side, in a lighter color.
How are inaccuracies, mistakes and blunders decided?
By the drop in win rate from before to after the move: 5 points or more is an inaccuracy, 10 or more is a mistake, and 20 or more is a blunder. When the eval before the move is outside ±2000 (one side is far ahead), the drop in eval is also used (600 or more is an inaccuracy, 1200 or more a mistake, 2000 or more a blunder), and the more severe label is shown.
When the best move is a mate, only the drop in win rate is used.
Where do I compare my move with the best move?
In the game move row below the board. The first line shows “Move N” and the move played, and the second line shows “Best” and the best move, each with the eval and win rate after that move. If you played the best move, it says “◎ Matches the best move”.
The label (Inaccuracy, Mistake, Blunder) and the drop in win rate (for example, Blunder −23.0pt) appear after the move played. Tap the best move to show it on the board as a dotted arrow.
How do I read the candidate moves and lines?
“Candidate moves” lists the top 3 moves for the side to move, in order of eval and win rate. The best move is shown as an arrow on the board. Tap a candidate move to replay the line that follows, one move at a time on the board.
When the best move has a clear aim, it is described in words, such as “Aims to check and win the rook”. To check a move that isn’t among the candidates, move the piece on the board and it is analyzed on the spot.
What are the Chance and Threat notes?
They point out key features of a position. A Chance note appears when you have a winning tactic such as a fork, a skewer, a discovered check or a mate. A Threat note appears when your opponent has a threat or your king is under a threatmate, shown with the mate length, such as “Threatmate (mate in 5 if ignored)”.
Related guides
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- How to analyze shogi games with AI for free
- How to open KIF files on your phone
- How to analyze your Shogi Wars games
- How to analyze your Shogi Quest games
- How to analyze your Piyo Shogi games
To learn more about Shogi Analysis, see the home page.