@DoTheMath, oups! Thank you, i didn't saw that, sorry.
Have a nice day.
Thanks for the feedback @Gaby_Groseille, @DoTheMath (who I like to think of as DoTheMeth) has it right - pin. I'm thinking about adding 'holes' and 'stalemates' at some point. There will always be new experiments, but will any of them help us play better chess?
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