#What do some of these move "flags" mean in the pgn?

7 messages · Page 1 of 1 (latest)

frail robin
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Hi, I'm using a few of lichess' pgn datasets as a data processing exercise. Before this, I've played a decent amount of IRL chess but haven't had reason to become familiar with the replay notation, so please forgive any noob misuse of terms.

Most of the pgn format is straightforward enough but there are a few "flags" that I can't intuitively grok. The couple random articles I read explaining the format also didn't list them. At this point I'm assuming they are custom extensions that lichess utilizes and am coming to you guys for help. 🙂

Anyways, for this thread I'm pulling pgn data from https://lichess.org/h7SAZCJr

Here's what I ||think I|| have worked out

  • (no) piece letter + tile position = pawn/piece moved there
  • x before tile position = the incoming piece captured whatever was there
  • O-O/O-O-O = castling
  • + after a move = check
  • # after a move = checkmate

These are some of the turns with flags I don't know.

  • 3... c6?! // question + exclamation
    1. Qe2?? // double question
  • 7... Bd7? // single question

Any help on understanding those 3 (or corrections on the first 5) would be massively appreciated. Thanks!

astral beacon
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The symbols are for inaccuracies, blunders and mistakes. You're right on the others

frail robin
hazy leaf
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blunder blunder
? mistake
?! dubious
!? interesting
! good
!! brilliant

frail robin
strange summit
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When you go to studies, you can find all the annotations.