Questions tagged [chess-variants]

Questions about variants of normal chess including bughouse, Chess960 (Fischer Random), atomic chess, racing kings, crazyhouse, antichess, etc.

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[FEN "4k3/7p/5p2/8/P2rr3/5N2/6PP/4R1K1 w - - 0 1"] [closed]

Set the alignment of a table column by placing a : on the left, right, or both sides of a separator in the separator line left center right One Two Three
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If the back row of white pieces is moved to be in front of the pawns, which side should I play?

I remember this starting position played many times by my grandfathers. But I am too young to recollect the results of their games. If I have to choose, which side should I play? (White moves 1st)
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How many Chess960 positions exist in which castling on 1 side does not require moving the rook on the other side?

Update: It's chess870 (or chess869). See answer. Context/Motivation/Goal: In regular chess, you never have to move a rook (on 1 side) to castle (on the other side). My aim is to see how much of 9LX ...
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1answer
61 views

Where to download fischer random games?

Where can I download the PGN files for the World Chess 960 championship from 2019, that was won by Wesley So? I can view the games on the website e.g, https://www.frchess.com/stream but I want to ...
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Name for the "folding magnetic chess set" variant?

Does anyone know the name of the chessboard variant where you fold a standard board along the line between the d-file and e-file, to get a double-sided 8x4 board? A piece on top can move past the edge ...
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2answers
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Is an early "normalization" of the position in Chess960 a sign of good quality game?

First let us start with two definitions. Definition #1: A position is said to be normal if there exists a sequence of legal moves from the classical starting position which lead to this position. ...
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1answer
90 views

Are there any tri dimensional chess rules utilising traditional starting positions?

I have a tri dimensional chess game for my phone which let's the player select different rule sets to play by. They all start with the king and queen on the attack boards which I find incredibly ...
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4k views

Would bishops be stronger or weaker on the same coloured squares?

Assuming one or both players makes a mistake and transposes a bishop and the adjacent knight when setting up the board, would this help or hinder them? The answers to this similar question suggest it'...
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211 views

How can I load a position without kings into an engine?

I would like to be able to do load a position into a whatever possible (advanced) engine without kings. For example, the goal of the game would be to annihilate all the possible pieces instead of ...
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What are the origins of Hand & Brain chess?

I was recently leafing through Pritchard's Encyclopedia of Chess Variants when I noticed that the variant Hand and Brain which has recently become popular, in which one player states the piece to the ...
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In Hand and Brain chess, is the stronger player generally preferred to be the hand or the brain?

Exactly what it says on the tin, as the British say: In Hand and Brain chess, is the stronger player generally preferred to be the hand or the brain? And secondarily: Is the answer to the previous ...
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How do convert/parse/extract data from a PGN into a spreadsheet/google sheet/excel file?

Sequel to this question: Live statistics chess960 from chess.com? So suppose I go to like https://api.chess.com/pub/player/gmwso/games/2020/12 or https://api.chess.com/pub/player/gmwso/games/2020/12/...
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Chess480: Why 480?

From wiki: Lewis has named this chess variation "Chess480"; it follows the rules of Chess960 with the exception of the castling rules. Although a Chess480 game can start with any of 960 ...
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Live statistics chess960 from chess.com?

Cross-posted stackoverflow, 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 ...
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Are there Chess variants or problems using this particular piece?

The piece I am asking about is the combined jumper (0,2)(0,3)(2,2)(3,3) or the combination of Dabbaba, Threeleaper, Alfil, and Tripper. It is used under the name Hawk in the recent Chess variant ...
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Winning percentage (white win/draw/black win) in chess960/9LX in 2021?

How does the winning percentage (white win/draw/black win) in chess 960 (Fischer random) compare to that of regular chess? The above was asked here: Winning percentage in chess 960. I would like to ...
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173 views

5D Chess - Why is white king not in check in this position?

Why cannot black rook on c5 in the bottom timeline capture the king on c5 in the top timeline? Why is the king not in check?
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Can you solve this chess problem of a lone knight against numerous opposing pieces?

[FEN "8/1nq5/bppp4/1p1k1K1N/1rrp3b/2pp2p1/8/n7 w - - 0 1"] I found this interesting and unique chess problem online. Disclaimer: This is not necessarily a position from a game. It's just a ...
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1answer
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Would move sealing make sense in chessboxing? Or do the chessboxing people explain why they don't have?

In chessboxing, I think that every switch from a chess round to a boxing round is kind of an adjournment. Yet, I notice chessboxing doesn't have move sealing. Some ways a switch is not quite an ...
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Looking for a simple GUI for variants of chess

I am currently coding an engine for a variant of chess called Monster Chess. I was wondering if there a GUI existed that would simply take pieces from a square to another (eg e4 to e5) without ...
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2answers
244 views

What is the solution to single-check chess?

Single-check chess is a variant where the first person to give check wins. There is a website that claims it has been solved, with white winning in four moves; however, I cannot find the moves ...
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796 views

Are there any official rules for Bughouse?

I came across this question - Formal rules for two-player bughouse without a clock - which asks if there is a formal way of breaking deadlock situations where one player on each side doesn't want to ...
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The slowest Fool's Mate in Chess960

The fastest Fool's Mate in Chess960 is obviously 1. d4 g5 2. Qxg5# with any ..Q.BRKR setup, which even beats standard chess. But which is the starting position with the slowest mate? I checked a few ...
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What site/s has/have different ratings for different time controls for Chess960?

Both lichess and chess.com and have ratings for live chess960, but this is regardless of time control. Please recommend a site that has separate ratings for different time controls for chess960. there'...
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The Chess960 analogue in shogi, xiangqi, etc

Fischer said In chess so much depends on opening theory, so the champions before the last century did not know as much as I do and other players do about opening theory. So if you just brought them ...
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Patterns in Chess960 positions

I have two questions. Where can I find more studies like this Lichess one, please? I got it from this answer elsewhere on this site. The Lichess study is talking about this position [White "...
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Relation between ratings for Chess960 and standard chess

Is there any relation or any attempt at discovering a relation between Chess960 ratings and standard chess ratings? This can be for GMs, for (any)M's, for pro players, or for all players on lichess/...
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Why Chess960/9LX and not Chess959?

This question asks if Chess960 is really Chess960 and not Chess959, i.e. the dice are really not re-rolled (positive, instead of normative). The answer is yes, it really is. However, why is Chess960 ...
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Chess training to get to 2000 rating [closed]

I have been playing chess (sometimes a lot, sometimes none) for a very long time. I want to become an international master in 4 years, or have a rating of 2000. I am 15 right now and have a rating of ...
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Response in antichess to 1. e3 b5 2. Bxb5 Bb7

I've been playing a lot of blitz Giveaway Chess (aka Antichess, etc; a chess variant in which capturing is compulsory, the goal is to lose all the pieces or be stalemated, there is no castling, and ...
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1answer
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Can you castle twice in Chess960?

Consider this Chess960 game. [FEN "rnkqbbnr/pppppppp/8/8/8/8/PPPPPPPP/RNKQBBNR w KQkq - 0 1"] 1. d4 Na6 2. e4 Nb8 3. Ba5 Na6 4. Bb5 Nb8 5. Qh5 Na6 6. Nh3 Nb8 7. Na3 Na6 8. O-O-O Nb8 9. Rd3 ...
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3answers
4k views

On an infinite board, which pieces are needed to checkmate?

Most of the winnable endgames require cornering the opposing king to checkmate, often using zugzwang. However, if you have an infinite board (infinite in every direction), you won't be able to corner ...
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132 views

Why isn't chess played white 1 move, black 2 moves, white 2 moves and so on?

In turn based games like chess, the player playing the first move has an advantage the whole game. One way to "remedy" this is to let the player starting the game make one move (and have the ...
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2answers
594 views

How many moves of head start does white need for a guaranteed win?

As we all know, it is not known whether white can always win in chess with optimal play. If, however, white got to make two moves before black made their first move would they be able to win with ...
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1answer
112 views

What rules are known for Chaturanga?

In the ancient Indian game Chaturanga, what rules are known, and how does it vary from modern chess? Also, is it a solved game?
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1answer
552 views

Controversy over the Xiangqi cannon piece?

When reviewing the nature of the pieces of various chess variants, namely the xiangqi cannon, I asked about its history. I was surprised that the dates of its mentions did not match 8th century ...
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1answer
235 views

Material value of the Berolina pawn

The Berolina pawn is a fairy piece that moves like a normal pawn, but can move two (and one in all other cases) steps diagonally and capture one forward. How much better (or worse) is this piece ...
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1answer
160 views

Is there a forced win in CastleChess?

Is there a forced win for White or Black in the chess variant CastleChess? The rules are explained in this post on an obscure blog named “Cinquante signes”, although it is originally from ...
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1answer
435 views

(Unbalanced) Double-Move chess - can white force a win?

I'm not talking about Marseillais chess (which is similar, but rules are added to reduce the advantage of the white), which is sometimes also called "balanced double-move chess". In a Double-...
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1answer
209 views

How big is the advantage for white in the "back-rank-game"?

Consider a chess variant in which normal chess rules apply, with one exception. The player that is able to bring a piece or a pawn onto the opponent’s back rank, which would be the 8th rank for White ...
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239 views

If there was a perfect play from both sides, but each player was allowed to do 2 moves every time, would white win?

Imagine a game where players are allowed 2 moves instead of one. If there were perfect play from both sides, would White win?
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771 views

What is Indian Castling exactly?

Western castling doesn’t exist in historical Indian Chess (Chaturanga). Instead, in some versions, there is a cool move whereby each king can once in the game make a knight's move. I read that it is ...
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1answer
94 views

New Chess Variant

If in chess, pieces have the option instead to not move, then how would the game change? I have looked through a few positions and I see that zugzwang doesn't work at all. What else would be changed?
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3answers
870 views

Can 5D chess be solved?

An interesting new variant of chess has emerged, showing that chess will always be fresh-5D chess. I mostly play the 5x5 version, but the positions do not rocket out of control like in the standard ...
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1answer
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A castling variant-how would it change the game?

In chess, castling can't be done if the king or relevant rook have moved. How would the basic strategy of the game change if the king and rook could castle after moving? Also, how would the game ...
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Chess variant-Is it strategically good?

In this chess variant, the number of moves made both chess players are 1 & 2 alternatively. Here is a showing of it. White Black 1 2 2 1 1 ...
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2answers
512 views

Are there any inherent problems with point-symmetric random chess?

The regular setup of chess is mirror-symmetric: If you mirror the positions of all figures on the equator of the board (between the fourth and fifth rank) and swap the colours, nothing changes. It is ...
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Why don't chess sites offer best of X match formats? [closed]

I believe chess sites should offer best of 3/5/etc match formats, rather than a one-off game. Basically, if you enter such a game, you don't "win" by just winning 1 game, you have to be the ...
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1answer
394 views

How much material is needed to force the capture of a lone queen (for example in horde chess)?

In horde chess, the following starting position is used: [FEN "rnbqkbnr/pppppppp/8/1PP2PP1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP w - - 0 1"] The goal of White is to checkmate Black; the goal ...
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1answer
467 views

Which chess GUIs support the chess variants Atomic and King of the Hill?

I want to play against Stockfish offline because I'm going on a trip. I downloaded the compiled exe from GitHub since my laptop will have limited Internet connection. After loading it into the Arena ...

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