Quote:
Originally Posted by Hamlet53
4. The 18th Century
5. The 19th Century.
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Quote:
Originally Posted by Fbone
15th
19th
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The 15th is close enough. The first written evidence is in the 16th century, but it may well have first come into use a bit earlier.
The 19th is right! The Italian chess rules didn't include en passant until 1880!