pgn | a PGN chess game parser for golang | Parser library

Cross-posted chess se, but nothing.

Both lichess and chess.com have the feature to play the variant chess960 live. However, only lichess has a graph showing how your live chess960 rating has changed over time. Lichess also shows other statistics like highest, lowest, best wins, worst losses, average opponent rating, etc. (chess.com does have this for correspondence chess960 though.)

I could create my own graph and statistics in Excel/Google Sheets by manually recording each game's date and my rating afterwards indicated beside my username, but...

Question: Is there a way to obtain, or what in general is the way to go about obtaining, ratings after each chess960 game using some kind of script that sees a player's public profile and then extracts the data?

I have a feeling this kind of script has been done before even if this was not specifically done for chess.com's live chess960. The script doesn't have to graph (pretty easy to do once you have to the data: just use excel/google sheets). I just need the script to collect all the dates and rating numbers for each line of the user's games.

Edit 1: Not sure of on-topic, off-topic stuff on stack of, but i've posted on stack of before. My 1st post was in 2014. It seems these post is getting negative reaction due to that I seem like I'm asking to be spoon fed or something. I don't believe spoon feeding is necessarily an issue here if it's not some homework thing, and spoon feeding is not necessarily what I am asking or at least intend (or 'am intending' ?) to ask anyway. You could just give me the general ideas. For example, if this is to do with 'scraping' or something, then just say so.'

However, I don't quite see this question as any different as like these:

1. How do I get notified if SE tweets my question? --> Here you could argue I'm asking about se itself on se, so it should be allowed. I've asked chess.com people, but they haven't replied to me, so here I am.

2. Pricing when arbitrage is possible through Negative Probabilities or something else --> I mean is the guy spoonfeeding or whatever by writing the script?

Edit 2: Additionally, what I'm trying to get at in this post is avoiding the concept of reinventing the wheel/wheel reinvention. I mean, I can't possibly be the 1st person in the history of the internet to ever want to extract their data from chess.com or lichess or something. Plus, chess is a game that has been around for awhile. It isn't like csgo or valorant w/c is relatively new. I really do not see any point A - to look up myself how to do go about extracting data from a site as an alternative to manually typing it up myself and of course B - to manually type it up myself when it would seem pretty weird if there weren't already readily available methods to do this.

Update 2: Fixed now. see the 'json' vs the 'preformed'. WOW.

Update 1: It appears Mike Steelson has an answer here, where the code is given as

I am experimenting with Qt 5 QScrollArea (in Python and PyQt, but I believe the question applies just as well in C++ Qt).

The Qt documentation for QScrollArea::widgetResizable says that "If this property is set to false (the default), the scroll area honors the size of its widget." By "its widget", I assume it means the widget being viewed in the scroll area.

However, in the program below I show an image label inside the scroll area, but the scroll area does not seem to "honor the size of its widget", because the image is partly hidden from the start.

The documentation also says "Regardless of this property, you can programmatically resize the widget using widget()->resize(), and the scroll area will automatically adjust itself to the new size." However, I do invoke resize for the viewed widget, but nothing happens.

The documentation also says "If this property is set to true, the scroll area will automatically resize the widget in order to avoid scroll bars where they can be avoided, or to take advantage of extra space." However, I don't see any resizing, even though if the widget were resized then it would be possible to avoid the scroll bars.

This is what I see whether I set the property to True or False, and whether I invoke widget().resize() or not:

Clearly I must be missing something quite fundamental here; what is it?

Edit: the main purpose of the question is understanding how widgetResizable works and what it does. Fitting the image into the window is a secondary goal.

Just to be thorough, I'll state here my whole project and what I'm aiming at.

I intend to adapt a shell script to work in Windows cmd, as this is intended for people who are not going to have some sophisticate language available.

Recently I came across a twitch streamer who was working on his own Deep Learning based chess engine. I was going through the code I saw in the video and one thing I didn't quite understand was why he used logical shifts when he was preparing the input data (i.e. the chess board representations) for training. Here are the rough steps that he followed:

1. He fetched a dataset with chess games in "pgn" format
2. For each move in each game there is a new board state that occurs. Each of these new states is serialized in the following way:

• He creates a 8x8 matrix that represents the 8x8 board after this specific move
• The matrix is supposed to store 8 bit unsigned integers
• He places all chess pieces on the board (i.e. in the matrix)
• The white pieces are defined as follows: {"P": 1, "N": 2, "B": 3, "R": 4, "Q": 5, "K": 6}
• The black pieces are defined as: {"p": 9, "n": 10, "b": 11, "r": 12, "q": 13, "k": 14}
• This means for instance that white pawns are stored as "1" in the matrix, whereas black queen will be stored as "13"

1. After serializing the board he generates the final board state from the original 8x8 matrix by executing some logical bit operations that I don't quite understand. Also the newly generated (i.e. final board state) is not 8x8 but 5x8x8:

I have a string with the Pgn from a chess.com match. I need to remove all of the time data from the Pgn. Using Regular Expressions how would I accomplish this?

'1. e4 {[%clk 0:29:59.9]} 1... e5 {[%clk 0:29:59.1]} 2. Nf3 {[%clk 0:29:58]} 2... Nf6 {[%clk 0:29:57.2]} 3. Nc3 {[%clk 0:29:51.9]} 3... Bb4 {[%clk 0:29:51.9]} 4. a3 {[%clk 0:29:49.4]} 4... Ba5 {[%clk 0:29:46.3]} 5. Bc4 {[%clk 0:29:44.7]} 5... O-O {[%clk 0:29:37.5]} 6. Ng5 {[%clk 0:29:37.9]} 6... d6 {[%clk 0:29:10]} 7. O-O {[%clk 0:29:35.7]} 7... Be6 {[%clk 0:28:41.8]} 8. Nxe6 {[%clk 0:29:19]} 8... fxe6 {[%clk 0:28:33.2]} 9. b4 {[%clk 0:29:13.9]} 9... Bb6 {[%clk 0:28:21.6]} 10. a4 {[%clk 0:29:08.4]} 10... d5 {[%clk 0:27:53.9]}

I would like to remove all of the timestamps with {[%clk ]} and some timestamp.

The expected string after should be:

'1. e4 1... e5 2. Nf3 2... Nf6' and so on

I am writing an a chess player and I have this script in js file that writes PGN to the text area.

Instead of this:

My script does this:

I am using chess.js for the backend and code that prints out the PGN in the function that is called every piece drop, so it updates every time player does a move.

I'm using API "chess.com" and I try to learn better dict:

i try to learn better dict in python. I am using an api "chess.com"

task: I need to get the EARLIEST record row based on the Time_Frame column.

Problem: Many student have multiple records (student can enroll in different schools)

table format: Student_ID, Time_Frame plus random personal information columns.

Data Sample: Not sure how to load a .xls here but, I uploaded the data for just one student on the .pgn, I need a query that will return the yellow row, based on the time_frame column as that would be the earliest enrollment for this individual. I tried the code below but it does not work.