How to correct reversed game notation? My son and I are rank chess amateurs, and we wanted to play our first "real" game where we keep track of moves to analyze later.  We started the game but then realized that the board was reversed (i.e. the black pieces were on rows 1 and 2).  Since we didn't notice until a few moves had been played, we just continued to use this reversed notation for the whole game.

The resulting PGN file doesn't want to import into lichess.  Is there any way to take our "reversed" PGN game file and make it compatible?  Perhaps some automated way to reverse the notation, or alert the PGN importer that the notation is reversed so it can handle it?
Adding on to Brian Towers' answer, there is a quick way you can script this (assuming you are on Linux or another POSIX system with the tr command):

cat gamelog.txt | tr 'abcdefgh12345678' 'hgfedcba87654321' &gt; gamelog_reversed.txt


Edit: as @wimi said, this will mess up move numbers, so be careful about that. You may want to use cut and paste to seperate only the columns with the moves.