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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5answers
4k views

Bizarre pin rule: pinned pieces do not attack

I found this guy who likes playing chess, but not enough to bother reading the rules; he only plays using a physical board with his sister (she doesn't know the rules either). The made up rule was ...
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7answers
2k views

How to determine the value of a piece from scratch?

Assume we have a standard chess set setup, but we make a slight change so that (for example) pawns can now move two squares forward on any move rather than just on their initial move. Even assuming ...
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3answers
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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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3answers
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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 ...
12
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3answers
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About the 3D chess they play on Star Trek

They play a type of 3D chess on Star Trek ( the 60's series) not on a 8x8x8 3D board but on some smaller variation. Yet the game as they have it is supposed to be complicated. Are there real rules and ...
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3answers
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Has loser chess been solved?

Loser chess has a benefit of sorts. There are many turns where moves are forced. So my question is, has it been solved? I'd say that the move tree is much smaller than chess. If not: How much would ...
8
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1answer
567 views

Did Indian systems really have fianchettos?

Wikipedia quotes: The Indian Defences by g6 coupled with d6, or b6 coupled with e6, were largely taught to European players by the example of Moheschunder and other Indians, to whom the ...
6
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3answers
735 views

Is 1. Nf3 good for white in bughouse?

I was wondering... When me and my friends play bughouse, a very common opening we play is 1. Nf3 Nf6, 2. Ng5 Ng4, 3. Nxf7 Nxf2, 4. Nxd8 Nxd1 Is this a good choice of opening in bughouse?
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3answers
612 views

Is the result in mini-chess known with perfect play?

I do not know, if "mini-chess" is the official name of the game I am talking about. In mini-chess, the players only start with the pawns (In particular, there are no kings!) The players ...
8
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4answers
603 views

Chess variation where the goal is to lose all pieces

A friend challenged me to a chess variation I have never heard of. All chess rules apply. If you have an opportunity to take a piece, you must take it, you cannot avoid or block exchanges. The only ...
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2answers
205 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 "...
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2answers
23k views

What are the rules of Quantum Chess?

The game Quantum Chess, as seen in the video where Paul Rudd defeats Hawking, has no "set of rules" written down. You either have to do the in-game tutorial, watch a video on the game and pick them up....
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5answers
26k views

Tactical difference between chess and Chinese chess

Is there any difference in tactics between chess and Chinese chess? If so, which one is the most fun? What are the important things to learn from it?
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9answers
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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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3answers
2k views

Is the pawns only variant a draw?

In the pawns-only variant of chess, each side starts with 8 pawns and a king on the usual squares, no pieces, with other rules being the same as in regular chess, including promotion. While general ...
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5answers
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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, ...
9
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3answers
1k views

Chess variant where king is captured

While trying to teach my 4 year oldson the rules of chess, I found it difficult to explain the rules of check, checkmate and stalemate. Having already explained the moves of each piece and how ...
7
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1answer
289 views

Gyula Breyer joke composition cooked?

I recently bought the delightful book Outrageous Chess Problems by Burt Hochberg, which among other things contains some interesting joke compositions. I have a question about Problem 102 (diagrammed ...
21
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4answers
4k views

Is there any position where not promoting(illegally) would be the best move?

Is there any position, where moving a pawn to last rank but not promoting it to any piece would be the best move? By the way, I know this is an illegal move. Assume it is legal. Edit: Now we have a ...
9
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5answers
4k views

What are the best scoring openings in Chess960?

I don't play Chess960, or Fischer Chess as it is also known. I've seen a lecture or two about it, but I was never interested. Last week I was a bit bored so I decided to participate in a tournament ...
9
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3answers
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Could two kings force checkmate against a lone king?

I was looking at minimal combinations of material needed to force checkmate (K+R, Q+B, R+N+N, etc). You end up with a sort of threshold of how much material is needed, and that sort of assigns a ...
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2answers
1k views

Mate Prevails - Chess Rule

Is "Mate Prevails" not an FIDE rule? I couldn't see it in the FIDE website but I heard about it from many players. UPDATE: "Mate Prevails" is a claim some players make that they win the game after '...
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3answers
1k views

About retrograde analysis

Raymond Smullyan wrote some great books with Retrograde Analysis chess puzzles. I know of two, are there others?
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1answer
677 views

Winning percentage in chess 960

How does the winning percentage (white win/draw/black win) in chess 960 (Fischer random) compare to that of regular chess? Are there more white wins, fewer draws,...?
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2answers
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How different would chess be if a stalemate was a win? [duplicate]

Historically stalemate has been handled in different ways. I wonder how different chess would be if it was a win for the stalemating player. Has enough thought been put into this so that it's ...
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3answers
191 views

What would a playable chess variant with a complexity comparable to Go look like?

What would a playable chess variant with a complexity comparable to Go look like? Simply increasing the board size is a very direct way to increase the complexity of the game, but this comes at the ...
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1answer
269 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 ...
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4answers
929 views

What other games or chess variants are useful to improve your chess skills?

I know about Chess960, and you can play that online at lichess.org. Furthermore, I like playing Go as well. But are there any good variants and other ways to train that you use, and you know to work ...
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4answers
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Crazyhouse/Bughouse openings

Are there any known or "standard" openings in bughouse or crazyhouse chess? Obviously, as soon as pieces start coming off the board things get less predictable, so this question is less about the ...
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2answers
600 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 ...
12
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3answers
876 views

How likely is it that a non-orthodox promotion is optimal?

Underpromotion is an interesting aspect of chess, but there are other possibilities that aren't allowed under modern rules. One is the so called "dummy pawn" as this question discusses: When (if ever)...
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2answers
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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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3answers
570 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 ...
6
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1answer
258 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 ...
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4answers
439 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 ...
5
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2answers
2k views

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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1answer
484 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 ...
3
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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?
3
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1answer
108 views

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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1answer
241 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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4answers
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What is the source of the house-rule 18-moves?

In my area, most kids including me grew up with a very popular house-rule: After all the pieces of either of the players are removed besides the king, the opposing player has 18 moves to checkmate him....
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0answers
240 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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2answers
228 views

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 ...