PJvanErp

Allows display of a interactive chessgame using the <a href="http://chessflash.com/" rel="nofollow ugc">ChessFlash PGN viewer</a> in posts and comments. Most of the settings of the Chessflash can be set either through adding parameters to the [pgn] tags or through the options page.
NB ChessFlash PGN viewer has been followed up by KnightVision, this plugin still uses the older version.
Usage:
<ul>
<li>paste pgn-code between [pgn] [/pgn] tags</li>
<li>use of parameters with their default values: [pgn height=350 tabmode=false flipboard=false initialply=22]…[/pgn]</li>
<li>additional parameters (puzzle, twoboards, boardonly) must first be allowed in options page</li>
<li>colors and piece characters can be set in options page</li>
</ul>

WP-ChessFlash

Allows display of a chessgame using the ChessFlash viewer

wouf

Chessdiag allows you to display clean and customizable chess diagrams directly in your WordPress content.
Use the shortcode with a Chessdiag position code between the opening and closing tags.
Example:
[diag]mrmnmbmqmkmbmnmr8mp32s8prnbqkbnr[/diag]
Features:
<ul>
<li>Display chess diagrams from Chessdiag position codes</li>
<li>Custom board size</li>
<li>Highlight squares</li>
<li>Draw arrows</li>
<li>Optional coordinates</li>
<li>Clickable board (optional)</li>
</ul>
The diagrams are generated via an external service.
<h3>External Services</h3>
This plugin loads images from:
https://chessdiag.org/
When a diagram is displayed, the visitor’s browser requests an image from this service. 
The request includes the encoded chess position (FEN) and display parameters.
No personal data is intentionally collected by the plugin itself. However, standard web requests may include technical information such as IP address or browser details, depending on the server configuration.

Chessdiag

Generate chess diagrams easily in your posts and pages using a simple shortcode.

WP-ChessFlash vs Chessdiag