Coliseum Developer Log - v3.5.0

What’s New in v3.5.0

Game Review Overhaul

• Rebuilt move classification around win probability instead of raw centipawns: Brilliant, Great, Best, Excellent, Good, Book, Forced, Inaccuracy, Mistake, Miss and Blunder.
• Accuracy now uses the Lichess formula, and ACPL is shown alongside it.
• Book moves are detected from the opening books in your books folder.
• Added a clickable evaluation graph, a Key Moments list, and a best-move arrow with the engine’s preferred line for every weak move.
• Fixed Brilliant moves never being awarded, and 1.2–1.8 pawn errors being labelled “Interesting”.
• Fixed evaluations dropping to 0.00 when an engine’s last output line had no score.

Live Analysis

• Shows the top 3 engine lines in standard notation.
• Fixed stale evaluations and arrows from the previous position showing up after a move.
• Fixed the eval bar using the wrong side to move when stepping back through a game.

Puzzle Generator

• New puzzle types: Punish the Blunder, Missed Tactics, and forced mates confirmed to end in checkmate.
• Every solver move is checked to be the only winning move, so each puzzle has one clear answer.
• Removed duplicate puzzles from the same mating attack or tactic.
• Added theme tags (fork, sacrifice, back-rank mate, smothered mate, discovered attack…) and difficulty ratings.

Tactics Trainer

• The opponent’s blunder is played on the board before you solve.
• Added hints, solved/failed tracking, success rate and streaks, plus a “Next Puzzle” button that jumps to unsolved puzzles.
• Alternative mates that are just as fast are accepted, and other winning alternatives are checked by the engine.
• New filters for unsolved and failed puzzles and for themes, plus sorting by difficulty.
• Fixed a freeze when checking alternative mates.

Fixes

• The Game Analysis layout now fits smaller windows.
• Analysis engines are shut down cleanly when the app closes.