Questions tagged [chess-variants]
Questions about variants of normal chess including bughouse, Chess960 (Fischer Random), atomic chess, racing kings, crazyhouse, antichess, etc. Can be used together with a more specific chess-variant tag, like [chess-960], [bughouse], etc. (see tag wiki for suggestions).
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What sites 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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A fun game (for problem composers, mostly...)
A game leading to a given position is called a proof game. Of course any proof game can be prepended with 1.Nf3 Nf6 2.Ng1 Ng8, so we defined a shortest proof game as, duh, the shortest possible proof ...
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How much would chess change if Black always had the last move?
In a hypothetical minor variant, could White's first-move advantage be compensated for by Black's right to last move?
Normally, White wins have White play N+1 plies to Black's N. How would the game ...
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King and short rook checkmate
Suppose White has a king and a range-x rook and black has a bare king on a chessboard with dimensions y times y.
What is the minimum value of x such that for all sufficiently large y, White, moving ...
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When was the last time Magnus Carlsen lost 2 classical games in a row to the same player besides to Wesley So?
Related questions:
When was the last time Magnus Carlsen lost 3 classical games in a row besides to Wesley So?
When was the last time Magnus Carlsen lost 2 classical games in a row to the same ...
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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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Baroque/Ultima vs. Chess
Baroque a.k.a. Ultima is a chess variant in which all the pieces except the kings have quite different powers than in regulation chess. They all make non-capturing moves like queens (except the "...
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Rules of Baroque chess
I want to do an AI project in implementing a Chess agent, so can anyone please let me know the Rules of Baroque chess.
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Analysis of positions with only one king on the board?
Endgame positions with just one king on the board may be very rich. Has any analysis of simple positions done? Maybe even tablebases for small numbers of pieces?
There are some existing problems with ...
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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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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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Record stockfish level 8 in atomic?
What is the shortest possible game against Stockfish at its hardest setting in
Atomic Chess? You cannot allow the computer to blunder the game on move 1 or 2, otherwise the shortest possible game is 3 ...
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How to gain a better understanding/intuition in queen races?
In antichess, queen races are when both players have their queens on opposite sides of the board, continually capturing each other's pieces.
In my experience playing antichess, queen races are very ...
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Is any research being done in penguin chess? Especially, is there a tablebase?
First here are the rules for penguin chess. Everything is the same as in normal chess, except:
Any piece, except the kings, can move to any empty square.
Pawns can't move to the 1st and 8th rank.
I ...
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On an Torodial board, which pieces are needed to checkmate?
I saw this question On an infinite board, which pieces are needed to checkmate? and was inspired by it.
Many mating combinations won't suffice on a toroidal board.
For example, queen vs king will be a ...
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Is white winning in chess with the 1st and 8th ranks reversed?
Here is the position I am referring to:
[FEN "RNBQKBNR/pppppppp/8/8/8/8/PPPPPPPP/rnbqkbnr w - - 0 1"]
It seems that there are no forced checkmates for white, any f3-Qh4# plans are thwarted ...
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Mating with B+N+handicap
Elsewhere there was a discussion on "pass chess" (instead of making a move you can pass...if you don't happen to stand in check!). There are three sensible rule variants of pass chess:
on/...
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Is bughouse a win for a team with excess time?
In bughouse it is a huge advantage during the game to have more time on your clocks than your opponents.
So I wonder what happens if one team starts with a time advantage (from now on called the time ...
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How bad is Stockfish in Fog of War chess
Since in Fog of War chess you cant see all the board , I think that engines would suck at it.Have there been any attempts on playing engine tournaments under Fog of War chess?
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Is there a crazyhouse+bughouse chess variant?
I would like to know if the following chess variant or a closely related one exists.
There are 4 players, say 1 to 4. Players 1 and 2 form a team and play aginst players 3 & 4 team. Player 1 plays ...
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Engine for Pawn Sideways Chess
Is there an engine I can download or buy that plays the variant described by AlphaZero in which pawns have additional sideways moves in addition to their regular moves? Fairy-Stockfish does not yet ...
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Chess960 castling controversies in the 2019 vs 2022 WFRCC, where both are Nepo vs Wesley So
Why did Ian Nepomniachtchi get a replay for the castling issue in the 2019 WFRCC vs Wesley So, but Wesley So didn't get a replay for the castling issue in the 2022 WFRCC vs Nepo?
I mean I know the ...
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Chess960 castling controversy in the 2019 WFRCC: Where can I see the original Nepo vs Wesley So game?
Apparently in the 5th game Ian Nepomniachtchi originally had to play 13. Rf1 instead of 13. 0-0 but then they allowed Nepo to replay the whole game.
The ff is the replay game:
https://lichess.org/...
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Why was the 2019 WFRCC called 'slow rapid' when it's actually classical (45+15=60)?
I'm asking about the '45 minutes for 40 moves plus 15 minutes for the rest, without increment' portions of the matches (for the quarter-finals, semi-finals and finals), which consisted of those and ...
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