Can You Write A Code To Detect Chess Diagrams In A Chess Book Of PDF?

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Can you write a code to detect chess diagrams in a chess book of PDF format and save it in the form of an image?

Most of the cheaters use simple method - start second game on another tab or smartphone against chess engine. T just duplicate original game by copying your moves and translate moves of the engine against you. In this case. 1. Check moves time. If each move made with the same delay, then +1 to cheat probability. 2. Check for inaccuracies, mistakes, blunders. If game was ideal, then +1 to cheat probability. 3. Compare moves of the game with the engine. If most of them are the same, then +1 to cheat probability. ————————————————————————————————————— Experienced cheaters use special software for cheating, for example - chess bots. These programs can make moves automatically almost without delay, which allow player to cheat in blitz, bullet and even in ultrabullet (15 seconds per game). Some chess bots have special mode, when t just show best move on the screen. It is also pretty fast, so game will look natural. You have very low chances to notice that you're playing against cheater in this case. In this mode your opponent will play the game by itself and use bits of advice from the chessbot only from time to time. Additionally smart cheater can use some old chess engine, which will be difficult to track comparing to Stockfish. All in all, with a proper usage it is very hard to identify cheating with the chess bot. However, here is advice for you. pay attention to sacrifices and mating sequences. Piece sacrifice is a difficult decision for a chess player. Usually it takes some time to play such move. However, engine can calculate tactic almost immediately. So if your opponent quickly makes "strange", but strong moves, maybe you need to take a closer look to his games. For example, at the position below (from the game Siegbert Tarrasch vs Romberg) chess bot find brilliant sacrifice in a second. Imagine if your opponent make such move in a blitz game against you with the accurate continuation (it is mate in 11, if you're interested). So, once again - even if in general a "smart" cheater plays almost indistinguishable from a grandmaster, he still can be caught in trifles, like instantly made brilliant sacrifices or perfectly calculated (with 10 seconds left on the clock in a bullet game) long mating combinations. Check your games with the chess engine on analysis board, for example at lichess (you can load FEN of the specific position or PGN of the whole game there). It is recommended to enable "multipv" option - this will show multiple lines (variations), suggested by the engine. It's important because smart cheater can play second or third best move in order to decrease overall strength of playing and achieve more human-like style through that. And don't forget always to check suspicious games for number of mistakes and blunders. If there are zero mistakes in 100 moves game, it is very strange. Take a look at screenshot below. DrNykterstein is Magnus Carlsen. As you can see even champions make mistakes. Conclusion Cheating is bad. Cheating in real tournaments is very bad. Cheating in online chess is also bad, however pretty harmless, because nothing at stake (except pride) in casual online chess game. Some ways of cheating are easy to detect, some are not. However, I can recommend not to make false accustitions, even if you think that you've lost only because your opponent wasn't play fair. First of all, use advices of this manual and check games, which you find questionable. If you have reasonable doubts, then just report this game/player to the moderators. T have much more experience and instruments to determine if any cheat was used. And in conclusion - don't worry over trifles. Perhaps chess is one of the greatest games in human history. But still it is just a game. Be healthy, take care of yourself and loved ones. It is the most important.

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