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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12
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1answer
472 views

If repetition loses, who wins KvK?

Suppose we're playing a version of chess where you lose if you repeat an earlier position (position = arrangement of pieces + who's move it is). We're down to the wire, and we've just arrived at the ...
14
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4answers
4k views

Are there any bughouse chess engines?

A friend told me its very hard to implement a bughouse chess engine because it requires much more processor power than a regular chess engine. Are there any bughouse engines out there ? if not, what ...
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2answers
169 views

What is the meaning of 'fighting draw' vs 'draw by theory' in re Chess960?

I remember reading in some YouTube comment that 9LX will lead to less draws or something. There was a comment response saying that it seems about the same. Then the original commenter replied in a ...
4
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0answers
259 views

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/...
7
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1answer
506 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-...
5
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2answers
375 views

Bughouse sitting/stalling full strategic breakdown

We play with the rule one loses -> the team loses. My cheesy titled question is serious: let's try to wrap our heads around the Bughouse clock mechanics. When should one consider sitting/stalling? I ...
6
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3answers
8k views

Bughouse chess strategies

Are there any nice strategies for Bughouse? I wish for advice on opening and how to win. I have not found anything good on the web.
-4
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1answer
98 views

Is the average online account underrated in chess960?

I'm going to use lichess as an example, but I believe this applies to chessdotcom too. (I think it's better to use lichess as an example anyway because lichess and statistics for 9LX.) It looks like ...
4
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4answers
452 views

Theoretically, is the analysis of the moves more complex if the objective is to be the first to be checkmated?

I have seen variations of other board games or strategy games where the aim is to actually 'lose' the game by forcing your opponents to make moves. Applying this concept to the rules of chess, would ...
18
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5answers
4k views

Can one side force a loss in regular chess?

Chess is unsolved, so there is no known optimal strategy for one side to force a win or a draw. However, is there an optimal strategy to lose? Consider a variant where checkmate results in a loss, ...
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0answers
92 views

What are some solutions to a possible/perceived underratedness problem in online chess960? [duplicate]

I'm going to use lichess as an example, but I believe this applies to chessdotcom too. (I think it's better to use lichess as an example anyway because lichess and statistics for 9LX.) It looks like ...
13
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1answer
1k views

Can you castle twice in Chess960?

Consider this Chess960 game. (Warning: moving backwards through this replayer will result in an incorrect board state. See Board playback and Chess 960 for details.) [FEN "rnkqbbnr/pppppppp/8/8/8/...
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3answers
299 views

Is castling good in Chess960?

The overall arrangement of the pieces in Chess960 seems so weird that I have a question about it: should there be castling at all?
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2answers
205 views

On an 8-by-∞ board, who wins between an infinite number of pawns and a rook?

I've had this puzzle rattling around in my brain for the past few days and I want to know what you all make of it. Imagine chess played on a board with eight ranks and an infinite number of files. ...
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0answers
65 views

Unhinderable long/short castling by White/Black

Assume the goal is that a certain side castles as soon as possible, and the other side wants to completely ruin castling rights. White simply plays 1.e3 2.Nf3 3.B any 4.(5.)capture an interloper 5.(6.)...
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0answers
83 views

Variant where each pawn promotes according to its file

Somewhere I came across a description of street chess played in India (I think) with a number of non-standard rules. One of them was that when a pawn reaches the 8th rank, it must promote according to ...
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0answers
53 views

variant where middle 4 squares aren't used [closed]

A teacher of mine proposed a chess variant to me that he called "border chess," where the middle four squares (d4, d5, e4, and e5) cannot be used. In other words, no piece can occupy one of ...
10
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3answers
1k views

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)
1
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1answer
301 views

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 ...
4
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1answer
494 views

Minimal number of moves before castling in Chess960

As you know, in the initial position Chess960 the king lies between the two rooks. Here are the rules for castling. For a starting position P, let n(P) be the minimal number of moves that White needs ...
6
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1answer
278 views

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 ...
8
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1answer
1k views

Allow piece removal

I'm wondering about a chess variant I thought of: it's just like chess except that a player may, in lieu of (or as) a move, remove any of his own pieces (except the King) from the board. (This is ...
4
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1answer
212 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 ...
7
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2answers
844 views

Other than Fairy-Max, is there a variant [fairy] chess engine that is compatible with XBoard?

Fairy-Max (which ships with the XBoard package) can play variant chess. Is there any other XBoard-compatible engine that also plays variant chess (and runs on Linux or *BSD)?
6
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1answer
290 views

Is there a formula that converts a number from 0 to 959 to a corresponding chess960 position?

I am looking into a website with starting positions for chess960. 000 BBQNNRKR 001 BQNBNRKR 002 BQNNRBKR 003 BQNNRKRB 004 QBBNNRKR 005 QNBBNRKR ... 959 RKRNNQBB So there is a table that converts any ...
7
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2answers
306 views

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 ...
5
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3answers
300 views

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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4answers
3k views

Who is best at Fischer Random chess, humans or engines?

I know that the old good question about engines vs humans has been asked multiple times, e. g. here. But what about random chess (aka Fischer chess or chess960)? Can humanity feel confortable about ...
7
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0answers
112 views

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'...
5
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2answers
1k views

Where can I find mobile software for Fischer random chess?

Fischer had a chess variation (chess960) but I cannot find any mobile app to play it. Does anyone knows where I can get the best software (if possible free or cheap) to play it?
6
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1answer
67 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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2answers
1k views

Major Chess 960 tournaments?

Does anyone have any information about upcoming Chess 960 tournaments at the top level (i.e. GMs and IMs)? Even links to/information about past, major tournaments would be appreciated. I recently ...
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0answers
248 views

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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9answers
1k views

Resources on chess variants

While posting this question, I stumbled on this list of variants from Wikipedia, which I must admit is totally awesome. I know a few online servers allow a few variants, but am not aware of places ...
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2answers
210 views

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 "...
10
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3answers
4k views

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 ...
5
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2answers
284 views

Chess variants-Anyone recall the name for one that has a "superpiece" with the movements of the queen and knight?

What is the name of the chess piece in a variant game where there is a piece that moves like the queen AND a knight? Is there a name for this variant?
11
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3answers
384 views

Looking for a chess variant with a circular board

I am looking for a certain chess variant played on a circular board. The variant is played with the usual chess pieces (no fairies involved) on a peculiar circular board. The central part of the ...
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0answers
88 views

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 ...
24
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3answers
4k views

Chess960 or Chess959?

Once in 960 times, Chess960 should just be the same as regular chess. Are there any known instances of this? Or is this selection automatically excluded, after which they just roll the dice again? So ...
2
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2answers
217 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 ...
12
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2answers
866 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 ...
12
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1answer
416 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 ...
3
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2answers
124 views

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. ...
4
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0answers
229 views

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 ...
3
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1answer
94 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 ...
14
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4answers
5k views

Why can't a dropped pawn deliver checkmate in Shogi?

In discussion surrounding another recent question, the fact came up that a "dropped" pawn in Shogi isn't allowed to deliver immediate checkmate, whereas any other type of piece can be dropped to ...
14
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3answers
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'...
7
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3answers
579 views

Formal rules for two-player bughouse without a clock

I would like to know what are the formal rules for two-player bughouse without a clock. I'd like to think of each team as a single player. It seems to me that bughouse chess works primarily because of ...
8
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6answers
3k views

In the game of shogi, what is the meaning of "sabaki"?

I'm reading the book Sabaki at a glance by Madoka Kitao. It's a very nice book with many good examples one can learn from. The problem I have is that I am left with only an intuitive understanding of ...

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