Oh, and if this does not replicate on your side, then the problem is in the "My Games" category - Find an opening you have played both sides of, make the first 2 moves for White and Black, and flip then from White to Black. Also make sure you are using a mobile device. I have seen bugs before on here that only fail on one device (mobile) or the other (desktop/laptop).
Reporting a Major Bug
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Sep 13, 2021
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#3
And whenever you guys fix this, you will want to do a negative test. Reach a position with White that you have never played as Black (or vice versa, set it to Black and play a sequence you never played as White, like for me that would be 1.e4 e6 2.d4 d5 3.Nd2) and then flip the color and test what the behavior is when no games exist with that color.
To replicate the bug, do the following on a mobile device.
Go to Learn --> Explorer
Search for user ThrillerFan
Leave the color as White.
Click on the following moves:
1.e4
1...e6
2.d4
2...d5
You will see I have over 250 games with the options of 3.e5 or 3.Nc3
Now change White to Black
I do have over 700 games with Black in this position, but 3.d5 is illegal. If you go back to the start and choose Black and then play the 4 moves, you get the 700+ games with Nc3, Nd2, e5, exd5, etc.
The problem appears to be that if you flip the color mid-stream, instead of giving you the moves played in that same position with yourself on the other side, it gives the last move played. So after 1.e4 e6 2.d4 d5, it gives the moves and count for move 3 for White in games where I had White. When I change it to Black, it SHOULD give the distribution of White 3rd moves played from that position in games where I had Black, but instead, it lists it as "3.xx" where xx is the last move played without the number and dots. Last move was 2...d5, and so this shows as "3.d5" played 708 times. 3.d5 is of course illegal.