Game Analysis

Once a game is loaded, click Analyze Game in the sidebar. The Stockfish engine evaluates every move in a background thread -the interface stays responsive during analysis.

Completed analysis -move list, evaluation graph, and accuracy scores

Analysis Results

When analysis finishes, every move receives:

Accuracy score (0–100%) per move
Move classification (Brilliant, Great, Best, Excellent, Good, Inaccuracy, Mistake, Blunder, Miss, Book)
Engine evaluation in centipawns or mate distance
Best continuation (the top engine line for that position)
Evaluation graph showing game momentum over time

Both sides get an overall game accuracy percentage, average centipawn loss (ACPL), and a breakdown of classification counts.

Game report -detailed analysis summary

Move Classification Reference

Moves are classified using win probability loss (WPL) — how much winning chance was lost compared to the best move.

Classification	Color	Meaning
Brilliant	● Teal	Only move that holds/improves the position, >40% better than alternatives, position not already winning
Great	● Blue	Only good move in the position, >15% better than alternatives
Best	● Green	Matches engine's top recommendation
Excellent	● Light Green	WPL < 2%
Good	● Green	WPL 2%–4.5%
Book	● Brown	Move matches known opening theory
Inaccuracy	● Yellow	WPL 4.5%–8%
Mistake	● Orange	WPL 8%–19%
Miss	● Red	Missed a forced mate or winning opportunity
Blunder	● Red	WPL ≥ 19%, losing position

Special cases:

Checkmate and positions held at ≥99% winning chance are always classified as Best
Brilliant requires the best move to be >40% better than alternatives, the position to have improved from a non-winning state, and the resulting position to be at least equal
Book is assigned when a move matches known opening theory (not by the WPL classifier)

Move list with classification badges

Navigation

Action	Method
Previous move	Left Arrow key
Next move	Right Arrow key
First / Last move	Home / End keys
Jump to position	Click any point on the evaluation graph
Select move	Click any move in the move list
Flip board	Press `F` key or click the flip button

Evaluation Graph

The graph plots centipawn evaluation for every move. Each data point represents the engine's evaluation after that move.

Above center: White advantage
Below center: Black advantage
Sharp swings: Tactical moments, mistakes, or brilliant moves
Click any point to jump to that position

Evaluation graph with clickable data points

Analysis Lines Panel

The right panel shows engine analysis for the selected position:

Top 3 engine lines with evaluations (when Multi-PV is enabled)
Move sequence for each variation (principal variation)
Centipawn score or Mate distance for each line

Analysis lines panel -engine variations and evaluations

Dynamic Chess Clocks

When the loaded PGN includes clock data (present in most Chess.com and Lichess games), chess clocks appear next to the captured pieces display.

Clocks show remaining time per player at each move
Monospaced font prevents layout shifting as digits change
When a player drops below 20 seconds, the clock turns red

Chess clocks display -time remaining per player

This is useful for reviewing time scrambles -you can see exactly how much time each player had during critical moments.

Keyboard Shortcuts

Shortcut	Action
← / →	Previous / Next move
Home / End	First / Last move
F	Flip board
Ctrl+O	Open Load Game dialog
Ctrl+A	Start analysis
Ctrl+T	Replay interactive tour
F1 or ?	Show shortcuts help

Tips

Right-click any analyzed move and select Explore from here to open the Opening Explorer at that position
Hover over the evaluation graph to see exact values
The analysis cache prevents re-analyzing positions you've already evaluated -second analysis is instant
Classification filters in the move list let you jump between moves of the same type