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Why can't I move my knight from d5 to c7?

Indeed, if this is a normal game of chess, then here White can play Nd5-c7. In fact that looks like the best available move. The red move Rxa5 actually looks like the worst available move. One issue ...
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Checkmate in ω² moves with finitely many pieces

Introducing a position of game value ω² with finitely many pieces In the following position with finitely many pieces, White has mate-in-ω² (Black to move): (For convenience, I put the position into a ...

Who has the edge in "gg chess"?

Solution for the helpmate: Nice idea.
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How can I get a chess engine to play custom chess variants?

Your best bet is Fairy-Stockfish, which is built on Stockfish 14 and supports dozens of piece and board variants, including custom variants! For example, here is how the "Indian Great Chess" ...
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What are the rules of Shatranj?

Summarizing the Wikipedia article, but comparing the differences between regular chess (that seems the most useful to me here): Kings don't face each other, the black King starts on d8 and the 'Queen'...
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Hourglass chess timer

The biggest problem with this variant, is that it gets players to play even more impulsively(the clock becomes a strategy to win). Imagine a scenario where white has accumulated a lot of time while ...
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What is the idea behind 1. nh3 h6 in atomic chess?

My answer is that 1. Nh3 is in fact inferior and that the computer doesn’t know what it’s doing. Playing 1. Nf3 forces black to play the worst possible move on move one which is f6, weakening the ...
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Mate-in-N problems where N scales indefinitely with board size

A simple example should come from knight-bishop endgames, assuming n is even. All pieces start out close to one corner of the board and the lone king needs to be chased into a corner of the opposite ...
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Chess-like games and exercises that are useful for chess coaching

Game: Race to the Finish I play this with the juniors at my local club to help them build their pattern recognition and endgame skills, not sure how it would work online Audience All levels Pros ...
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Do chess960 and chess differ for reasons 'far beyond just opening theory'?

I think of the converse of this explanation: Many important strategic and tactical patterns in traditional chess (a) are specific to the initial position even though (b) they are not specific an any ...
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Chess variants with less tactics and more strategy?

Most players who know both games would say that Go (when played on the standard 19x19 grid) puts more emphasis on strategy than chess. Complex, deep tactical fights do happen in Go and the ability to ...
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Is there a name for a chess variant where you are allowed to capture your own pieces?

On chess.com it is called Any-Capture on the varients page Just go to Custom on Most Popular then Custom Rules and turn Any-Capture on or use this link https://www.chess.com/variants/capture-anything

If repetition loses, who wins KvK?

It's been long enough. Here's John's beautiful answer. Suppose the Black king has just captured the 30th unit, to leave the two kings alone. White now chooses a 2x2 square currently containing the ...
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Are bishops and knights more powerful than rooks on an 8x8x8 board given these rules?

I would say yes, the bishops and knights would probably be slightly stronger than the rooks. Let's start out with a look at how many squares the pieces cover on an empty board: Traditional chess: 64 ...
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Chess-like games and exercises that are useful for chess coaching

Exercise: Maze Audience Complete beginners Pros Much simpler compared to chess Rules The player has only a few pieces (sometimes only 1 piece), and oppenents pieces are frozen (they do not move). A ...

How to ask an AI engine to test this chess variant?

Currently there is no “easy” way to do exactly this. The “easiest” way in this case would simply be the right way. You would have to learn a coding language and develop a chess computer using an ...
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Who has the edge in "gg chess"?

Solution for mate in 7 starting from 1 Kf5?? in the Ke4/Kd5 position: Variations: P.S. Looks like 1 Kf4?? e5+ mates one move faster, the main line being 2 Ke3 Qg5+ 3 Kd3 Qg6+ 4 Kc3 Qc6+. If instead ...
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Do amphibians usually have more synergy than other compound pieces?

Not just amphibians. Other pieces too! Note: I'm assuming an 8x8 board. A different board size would have VERY different values! Let's take the queen as a standard. Queen consists of Rook + Bishop, ...

Is there an engine for Duck Chess?

On this link you can find developpers programming a Duck Chess engine, available here. This engine is named Quack.
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Is there an engine for Duck Chess?

AI on pychess.org pychess.org added Duck Chess as a variant on 2022-12-26, and also included an AI. You can play against it by choosing PLAY WITH AI on the main page, then selecting the DUCK variant.
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Is there an engine for Duck Chess?

I also investigated this topic and I created an experimental engine of my own: https://github.com/OndrejKincl/DuckChess.jl From this experience, I would say it will not be very difficult to prune ...

How does FIDE define slow rapid & fast rapid?

Quoting from the FIDE Handbook Appendix A defines "Rapid Chess": A.1 A ‘Rapid chess’ game is one where either all the moves must be completed in a fixed time of more than 10 minutes but ...
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How does FIDE define slow rapid & fast rapid?

For regular chess, there's no official definition other than "Blitz", "Rapid" and "Classical". Distinctions inside each of these three categories would be a matter of ...
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Opening Theory in Hexagonal Chess?

I tracked down a book, First Theories of Hexagonal Chess by W Glinski published by Hexagonal Chess Publications in 1974 and managed to buy a second hand copy. That lists several openings: King's ...
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Website for playing Cylinder Chess

For those who are still looking for somewhere to easily play cylinder chess online (live), you can now do so on cylinderchess.com. I'm a student and put this web app together in my spare time. It's ...
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