Changelog

Guess the Move — new training mode: load any saved game, play through it as one side, score your moves against the engine's evaluation, and track an Elo-style rating that improves across sessions
Sound effects — move, capture, and game-event sounds; toggle in Settings → General
Piece sets — choose from five piece sets in Settings → Board Appearance: Cburnett (default), Merida, Alpha, California, and Staunty; piece previews shown in the selector
Lichess Studies import — import any public Lichess Study directly into an opening repertoire; two-step configure → preview flow before importing
Lichess OAuth — connect your Lichess account via OAuth in Settings → Connected Accounts (required for private study import)

[0.5.1] - 2026-04-15

Startup splash screen: animated Masterboard logo displayed for a minimum of 1750 ms on launch and until the app is ready; enabled by default
Settings → General: Show splash screen on startup toggle

Personal Statistics Dashboard (/statistics): W/D/L breakdown by colour, time control, and opening; 5-game rolling accuracy trend chart; blunder position gallery with FEN thumbnails; blunder heatmap board visualisation; luck rate and opportunism rate; all figures filterable by folder or collection
Personal Tactics (/tactics): blunder (??) and mistake (?) positions from batch-analysed games extracted into a personal puzzle pool; FSRS v4 spaced repetition scheduling per puzzle; 10-puzzle sessions with correct/incorrect feedback and solution display; end-of-session summary

Opponent Preparation Report (/reports): W/D/L by colour; strongest lines with frequency and result rate; deviations tier showing positions where the opponent went off their own established book; export as PGN; bulk analysis of all games against a specific opponent
Theory diversion detection: detects the exact move where a player deviated from their studied repertoire; visible when stepping through games on the Home page and in Reports
Repertoire tab in Explorer panel: shows prepared moves at the current position across all active repertoires; available on the Home page, Repertoire Builder, and Reports view
Polyglot book support: import .bin Polyglot opening books into any repertoire; per-move weight editing; export any repertoire as a .bin file for use with UCI engines

FSRS scheduler: replaced the binary interval-doubling scheme with the open-source FSRS v4 algorithm; each move tracks stability, difficulty, elapsed days, and review state
Repertoire comments during drill: comments and NAG symbols attached to a move are shown in the feedback strip immediately after a correct or incorrect answer
"Review All" mode: walks the entire repertoire in DFS order regardless of SRS due dates — for pre-tournament run-throughs
End-of-session summary: moves reviewed, percentage correct, and cards graduated
Coverage heatmap: each move in the Repertoire Tree panel displays a colour-coded dot based on FSRS retrievability
Branch training: right-click any move in the Repertoire Tree panel → Train branch scopes a drill session to that subtree

Automated batch game analysis: engine runs at depth 18 on every position, classifies moves using the Lichess winning-chances model, inserts best-move variations into the game tree, and computes per-player accuracy (%) and ACPL
Analysis panel: SVG eval graph across the full game, per-player accuracy and ACPL, inaccuracy/mistake/blunder counts
Master game database: import any PGN collection as a local position index; background import with live progress bar
Explorer panel: Master DB tab shows move popularity, W/D/L%, and average Elo from master games; My Games tab queries your personal collection
Personal position index: games indexed incrementally at import time; re-index on demand from Settings
Opening repertoire drills: SRS core loop with auto-play opponent moves, correct/incorrect feedback, per-move interval tracking

Stockfish UCI engine integration: backend engine manager and engine panel UI
Opening repertoire builder: create repertoires, import via PGN, visual move tree with annotations
ECO auto-classification of imported games; live ECO display in the Notation panel

Initial application: Go + Wails v2 + React/TypeScript foundation
SQLite game database with PGN import and export
Home page with full annotation support: NAG symbols, free-text comments, board arrows and square highlights
Games library page: filter by player/result/source, bulk select and delete
OTB game recording page