chess | A MapReduce job to explore blunders in chess games

I posted a similar question to this one a few weeks ago where I had trouble finding the data race in my N-queens program using pthreads in C. Why is my multithreaded C program not working on macOS, but completely fine on Linux?

I got a few suggestions in the comments sections of the post and I really tried my best to make corrections based on them. I sat with the suggestions a few days, changed some parts but the data race persisted and I just cannot understand why. There are counters inside critical sections for the number of productions and consumptions. I feel completely blind when looking through the code and analyzing it, I'm aware that consumptions are too many but the synchronization around that code fragment should with my knowledge be correct, but obviously something's not right. External input would be greatly appreciated.

This is the code I'm using and I'm not sure how to reduce its size to still reproduce the issue. I compile it with gcc (clang-1205.0.22.11) on macOS Monterey (12.1) using a MacBook Pro 2020 x86_64 architecture.

compile: gcc -o 8q 8q.c*
run: ./8q , NxN chess board, N queens to place
parameters: ./8q 2 4 Enough to highlight the problem (should yield 2 solutions, but every other run yields 3+ solutions, i.e duplicate solutions exist
note: running the program with ./8q 2 4 should give 2 solutions, 1820 productions and 1820 consumptions.

I am trying to make a chess game in java, by having a class of pieces and a subclass for each piece. However, When I try to draw the pieces, The position doesn't seem to register.

Here is my Piece class:

Assume inputting a sentence contains one or two spaces and has the structure ${Verb}${one or two spaces}${Activity}, how could I extract the Verb and Activity in Typescript?

I am creating a game in Unity using C#. The has a grid-like board (think Chess). Each square in the board is responsible for itself (selection status, animations, events) and will emit events (e.g. when selected it will emit an OnSelect event) to indicate what's going on.

There is also an overall BoardManager class, which needs to monitor those events and respond to them.

As I understand it, in the BoardManager class, I would need:

1. To create a separate reference for each of those Square classes, so that I can monitor the events they output
2. Subscribe to each event from each square to the required callback function in BoardManager
3. Remember to unsubscribe each event on Destroy

I can do this using a foreach loop, it just "feels wrong".

I was hoping that there is a way to, rather making 50 object references and 50 event subscriptions, to be able to just tell it to subscribe to any instantiated version of that particular object (e.g. Any instance of Square), so that I can reference it that ONE time, and subscribe to it ONE time. Does that make sense?

trying to learn answer set programming and decided to give the n-queens problem a go. This is what I have so far:-

I found the below text from here, saying that the result for minimax for games like tic-tac-toe and chess will always be a draw. I also saw minimax algorithms for unbeatable tic-tac-toe. But I don't quite understand the reason why minimax results in a draw. Is it because there is no guaranteed winning or losing move and thus the best possible option for both players is a draw?

a computer running a minimax algorithm without any sort of enhancements will discover that, if both it and its opponent play optimally, the game will end in a draw no matter where it starts, and thus have no clue as to which opening play is the "best." Even in more interesting win-or-lose games like chess, even if a computer could play out every possible game situation (a hopelessly impossible task), this information alone would still lead it to the conclusion that the best it can ever do is draw (which would in fact be true, if both players had absolutely perfect knowledge of all possible results of each move).

I am a new coder in c, recently moved over from python, but still like to challenge myself with fairly ambitious projects (like a chess program), and have found that my computer suffers an unusual number of BSODs, both when I am running a program and not (admittedly, attempting to use the entirety of my memory as a hash table may not have been the greatest idea).

So my question is, are these most likely caused by my crappy c code, or is it more likely that my 3 year old, overworked laptop is the culprit? If it could be the code, what are the big things I should avoid doing so as to prevent this?

I want to split the following character string from a chess game into separate strings like the ones below removing the "1-9." pattern while maintaining all the other text.

Example:

This is a follow-up to my last post. The code works without any errors and can calculate the next best move. I've been looking into how to incorporate transposition tables and move ordering into my negamax function to make it run faster and more accurately, but it seems somewhat difficult and advanced for a beginner like myself.

You can find my code here.

While researching on the chess programming wiki I found some sample code for transposition tables: