Chess for Kids and Szachy dla dzieci have hundreds of diagrams made here.

Chess Diagram Editor with arrows, selected squares and text

Different chessboard dimensions for chess variants

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or modify the URL, e.g. https://www.apronus.com/
chess/diagram/editor/?w=16&h=5.
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You can download a PNG image with text above and below the diagram on the download SVG tab.

Note that the Alpha font is free only for personal use.

convert SVG to PNG

Note that the Alpha font is free only for personal use.