About Preflight Play

Preflight Play is an independently operated learning and board-game project at filepreflight.com. Its name describes the habit we want to encourage: prepare before the next move. Read a rule, predict what will happen, try it on a board and compare the result. You do not need an account or a paid subscription to study here.

The site is maintained as an independent project, with editorial and technical feedback handled at sundada032@gmail.com. We do not present the site as a chess federation, tournament authority or accredited coaching service. The lessons are designed for readers building confidence with Sudoku, Xiangqi and Go, particularly those moving between Chinese and English terminology.

There are three ways to learn: follow a connected learning path, investigate a position from the library, or read a worked explanation and try its example. Lessons begin with board coordinates and movement rules before introducing captures, defensive replies and longer variations. You can revisit a step without completing the entire path. Invite-only rooms let two friends practise together; they are not a ranked matchmaking service or a computer opponent.

Our teaching articles explain the premise of a deduction, the move it supports and a counterexample where the same shortcut fails. New worked examples are checked against the site's rules and regression tests. That catches many coordinate and move errors but is not a substitute for expert tournament adjudication. Chinese and English versions use the same positions; terminology and explanations are reviewed together when a correction affects both.

Classical records are a starting point for exploration, not a claim that a single recorded continuation exhausts every defence. You can branch from a replay and test another reply. Record credits and reuse conditions appear on the Licenses page. Historical game facts, traditional rules, our teaching explanations and software functions have different origins; the applicable permissions should be checked before republishing a collection or an article.

Practice has clear limits. Xiangqi rooms use a simplified repetition rule rather than full tournament chase adjudication. Go scoring requires the players to agree on dead groups. Sudoku answers are useful for comparison, but a correct digit alone does not explain a deduction. The Playing rules page describes these distinctions so that a learner can interpret the board's feedback correctly.

If an explanation seems wrong, send the page address, section or puzzle ID, and the moves that reproduce the issue. A screenshot and the expected result help. Corrections to a worked example are checked in both languages and the relevant tests are updated when appropriate. Please do not include passwords, room seat credentials or identity documents. Contact and privacy information remain available without signing in.

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