I probably remember most of a serious in person game for about one day after completion. For longer retention I’d probably need to strengthen my memory with a serious review.
I probably forget a casual online blitz game in an hour.
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I think I am unusually good at remembering my* games. I can generally record (with just mistakes in small yose and ko threats) all my games from a tournament when I get home afterwards from memory, even for 2 week events like EGC with 10 games (just the main tournament, not side fast events). I think it’s not so much time that pushes them out my memory, but new games coming in: my memory capacity for recent serious games is probably about a dozen. And if it’s one I’ve put a lot of repeated intense thought into like an OGS correspondence it sticks around for longer. These 10 year old OGS games I couldn’t replay from memory, but remember the formations particular of opening into middlegame.
* Or those of others in the same tournament that I look at in my wanders: sometimes when reviewing someone else’s game they forget what happened next and I remind them!
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May I have a go?
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Could I have the year?
Hmm, or would that make it too easy?
I’ll hold off until you decide, but obviously I can provide any sort of hint you’d like if you’re stuck 
No need: I remember playing White in Game C.
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Well done!
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Oh! I didn’t remember that was my game against Larry.
We indeed played it quite slowly. It was one of my more memorable games.
You call that slow? 
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(10), (12), and (14) are moves I often play.
I remembered the (20–22) manoeuvre.
I also specifically remembered the strange shape I made with (24-6), and also the (29–30) exchange. (32–4) rang a bell as well.
I recall (40)–(78) mainly as a single idea, but now that I look for longer I start to remember particular moves as well.
(120–32) was another memorable point for me. I spent a very long time there.
I genuinely stared at the lower right for one whole hour
Not a joke! The fact that White has to fill from inside and be captured makes it a difficult semeai.
That was probably the most memorable of any of my correspondence games before the Regulars Handicap tournament, so I guess I got lucky there.
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Five games, one each from: @KAOSkonfused, @bugcat, @teapoweredrobot, @_KoBa, and @Vsotvep
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This is harder than I thought
Game 1B - 61 is weird, I wouldn’t play 69
Game 1W - maybe? move 66 and 74 feel weird to me though
Game 2B - I don’t think I’ve ever played 45
Game 2W - I’m not sure if I would play move 116 or 182
Game 3 - I do like to play weird openings, but I think I would’ve remembered this one.
Game 4B - I don’t think I’d ever play move 23
Game 4W - I wouldn’t play move 24, or 170 (I hope)
Game 5B - maybe? I’m not a fan of mini-Chinese, but I’ve played it a couple of times
Game 5W - move 150 is really weird, I don’t think I would play that
So, either 1 white or 5 black. I guess 5?
Now I looked at the solutions as well 
Almost had it…
Looks like we played a large part of that game live, that might be why I don’t remember it as well.
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Yup, I’m going to have to look at these on a computer. Too difficult going back and forth on my phone.
And I have forum games category muted so this is all a bit of a surprise!
But I think I can rule out a few from the openings. Like 1 and 3.
I’ll get back to you later today hopefully.
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First game: Not me, neither Black nor White, is what I already think about the opening.
Second: If that’s mine, then I’m White. But some moves are very unusual for me, so: no.
Third: Haha, no, never played this opening.
Fourth: Uh, what a weird game. But… looks familiar. 
I played Black. I think it was not that long ago, maybe half a year ago, but I don’t remember who my opponent was.
Fifth: I was a bit unsure at first if I could be Black, but then came a sequence that I think I never had in any of my games.
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Pretty sure I was White in Game 3.
I don’t actually remember the game but those are all my moves on display: the dual 5-4s, the keima cover in the top right, the R17 cut, and knowing about B5 instead of pushing in.
Also the fact that I took the two cuts in the lower left.
I think that was during my phase of playing 50 consecutive games with the dual 5-4 opening so as to forcibly ingest the joseki. So it should be 2017 or 2018.
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Oh, January 2019. I hope I’ve come on a bit from there, hah.
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Oh wow, none of those looked familiar XD
I had to take a peek of the solution so cant really guess anymore, but omg i used to play slow and passive moves back then >____>
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right so my guess is:
game 1 - I’m not black as I don’t think I have ever opened anywhere other than top right and I don’t really recognise the rest of the game play. I could be white but there are various moves that I doubt are mine but who knows!
Game 2 - it’s possible that I’m white in this one
game 3 - no
game 4 - I could be black here - only move 97 makes me doubt it but it might have been a misclick? I don’t think I’ve ever played the white opening like this.
game 5 - This one seems really familiar. I don’t think I was black based on the opening so I must have been white
so I think I’m white in g5 or otherwise black in g4… gonna check in a mo
Edit - so my memory is not completely shot but really don’t recognise my past go playing self - I guess a good sign of the progress I may have made!
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