What were the different versions of the touch-move rule over history?
There are various chess problems, particularly from 19th century, which depend upon it, and they seem to make different assumptions about the players' choices.
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The touch-move rule has existed since at least 1497, although possibly earlier since there was little documentation of chess at that time. Up until a few years before 1931, there was a rule that if the move was illegal you had to move your king. This did not mean that you could not castle (assuming that you hadn't touched a piece other than the king). However, if one made an illegal move and then was forced to move their king, they could not castle (as it also involved the rook).
This led to problems, such as an 1893 game wherein a player was forced to move their king on move three, possibly resulting in checkmate (sources are unclear). This was documented in Edward Winter's Chess Notes 5381.
[Title "Lindemann-Echtermeyer, Kiel, Kiel Germany, 1893"] [FEN ""] 1. e4 d5 2. exd5 Qxd5 3. Ke2?? Qe4#