#528 Restore addition about pgnPuzzle

readme.md

@@ -11,7 +11,7 @@
 
 * [chess.js](https://github.com/jhlywa/chess.js) Base library to model chess in JavaScript
 * [Chessground](https://github.com/ornicar/chessground) The chessboard used by lichess.org
-* [pgn-reader](https://www.npmjs.com/package/@mliebelt/pgn-reader) Backend for the viewer (part of this repository, but separately published)
+* [pgn-reader](https://www.npmjs.com/package/@mliebelt/pgn-reader) Backend for the viewer (former part of this repository, now separate repo)
 * [pgn-parser](https://github.com/mliebelt/pgn-parser) My own parser based on [peggy](https://github.com/peggyjs/peggy) (formerly pegjs)
 
 See the section Acknowledgments for more supporting libraries.
@@ -22,7 +22,7 @@ that demonstrates all parameters in a running example.
 
 ## Getting Started
 
-The easiest way to use it is to install it by using NPM: `npm install @mliebelt/pgn-viewer`. You will find there the diretory `lib` that contains everything. Copy that onto your webserver.
+The easiest way to use it is to install it by using NPM: `npm install @mliebelt/pgn-viewer`. You will find there the directory `lib` that contains everything. Copy that onto your webserver.
 
 ### Example Screenshots
 
@@ -57,6 +57,7 @@ There are four different kind of usages:
 * `PGNV.pgnEdit` is a superset of pgnView, that allows to additional add variations, change the order of main line and variations, and other kind of interactions like adding comments, PGN notation elements, ...
 * `PGNV.pgnBoard` will just show a position without any interaction possible.
 * `PGNV.pgnPrint` will just show a whole chess game, without any interaction possible.
+* `PGNV.pgnPuzzle` lets you solve a puzzle. If you play the right move of the underlying pgn, the opponent's move is played automatically and it is your turn again. Only the already played moves are shown to the user. The mode is new and the plan is to develop it further (e.g. giving hints)
 
 There is at the moment no way to save a game that was edited in `pgnEdit` mode. But you may at least copy the whole notation, and insert it again in the HTML code of your web page.
 
@@ -153,7 +154,7 @@ We use the following libraries in the implementation:
 * [Chessground](https://github.com/ornicar/chessground) The chessboard used by lichess.org
 * [Mousetrap](https://craig.is/killing/mice) Binds keys to actions in the UI
 * [roddeh-i18n](http://i18njs.com) Internationalization (== i18n) library to translate chess into current 18 languages. Strings are inlined in the library.
-* [timer.ts.old](https://github.com/fschaefer/Timer.js) Small timer for automatic moves
+* [timer.ts](https://github.com/fschaefer/Timer.js) Small timer for automatic moves
 * [FontAwesome](http://fontawesome.io/) Nice icon font used for some buttons
 * [PGN Specification](https://github.com/mliebelt/pgn-spec-commented/blob/main/pgn-specification.md) PGN (Portable Game Notation) specification
 * [NAG Specification](http://en.wikipedia.org/wiki/Numeric_Annotation_Glyphs) Definition of the NAGs (Numeric Annotation Glyphs)