# Tag Info

8

Consider two starting position that are each other's horizontal mirror images. Say, the normal chess starting position, and the one with king and queen reversed. In chess 480, those two are essentially the same game, normal chess: in normal chess you can castle long with the king ending on c1, and short with the king ending on g1. In the reversed position ...

5

Ah well, I can program that in MATHEMATICA in ten minutes, regardless of the details... L = Permutations[{"K", "Q", "R", "R", "B", "B", "N", "N"}]; (* all permutations *) T1[LL_] := (Position[LL, "R"] // First // First) < (Position[LL, "K"] // ...

5

The goto site for downloadable pgns for regular chess is Mark Crowther's "The Week in Chess". The good news is that he also covers 960 or Fischer Random. This is TWIC's page for the World Fischer Random Chess Championship 2019. The link for the pgn files is here.

5

I am working on creating a web app on the Lichess chess and chess960 rating relationships. Still collecting some more user data. Will probably publish it in heroko later. So far this is the formula after a given number of data points from the dynamic regression factors on the left side bar. Update 1 Target is now an option, so conversion from different ...

4

For the time being, without being certain one way or the other, I simply challenge the hypothesis: You could look at eval tables and computer games (or human games, if a sufficient number are available separated by SP) to determine whether the White advantage is greater in Chess960, whether on average (mean, median) or how imbalanced SPs can get. Some ...

4

Is the average online account underrated in chess960? No. You appear to not understand the basic principle of chess ratings. They are not absolute measures of playing ability. They are relative. If player A is rated 2000 and player B is rated 1000 on the same platform, format and time control, then it should be safe to say that player A is a better player ...

4

Randomizing variants of Xiangqi Xiangqi has numerous variants: here are three which involve randomization. Lucky Xiangqi When I lived in Hong Kong, I saw numerous old guys playing Xiangqi in the villages - while their wives played Mah Jongg back home, I conjectured. About half the time, they would play a randomized version of the game, where all the pieces ...

4

In Chess960, after castling, the kings and rooks end up in the same place as they do in standard chess. That is, if white castles kingside, the king will always be on g1 and the rook will always be on f1. In Chess480, my understanding from your quote is that if the white king starts on e1, f1, or g1, then after castling kingside, it will end on g1 and the ...

3

Yes, it's possible to obtain the data you want. Chess.com has a REST API which is described in the following news post: https://www.chess.com/news/view/published-data-api You can use the following URL to get a list of monthly archives of a players games: https://api.chess.com/pub/player/{username}/games/archives In this list you will find URLs which look ...

3

I think there can be no slower one than mate in 3. My standard checkmating attempt would be like the starting positions 1.e4 e6 2.Ke2 Qh4 3. pass Qxe4#. What can go wrong there? 1. Ke2 could be illegal in a position like Kb1 Qh8. With the king on b1 the a1 piece has to be a rook per rules of piece set up. In this case 1.a4 g5 2.Ka2 Qd4 3.Rb1 Qxa4#. So ...

3

This question was put to the Norwegian supercomputer Sesse in 2019, which analyzed each opening position using Stockfish 9 to a depth of 40. Its conclusion was that there are four initial positions that give white an advantage of 0.5 or better. The maximum imbalance (worst for black) is BBNNRKRQ which has an evaluation of +0.57 in white's favor. position ...

3

How do I get this data into a spreadsheet like column 1 is all the dates, column 2 is the corresponding white elo, column 3 black elo, col4 white username and col5 black username? From the .pgn file downloaded at https://api.chess.com/pub/player/gmwso/games/2020/12/pgn I have created a file called chess_games.xlsx and I have inserted the five values you are ...

3

You are right in the fact that the "draw by theory" refers to (mostly) the opening theory. One of the big criticisms of classical chess is that the starting position has been analyzed very extensively and a player has, if they so want, choices of opening theory that lead almost guaranteed to a draw (thus "draw by theory"). These lines ...

3

The first idea that occurs to me in this is e5 followed by Ne4 (hence black played ...d5 followed by ...f5 in your engine line) because the Black position, as the phrase goes, "leaks like a sieve." Let's take a simple scan of the static features in black's position, without looking for variations: Black's position is painfully weak on the dark ...

3

These sharp positions usually rely on specific calculation, so small details can make the position change completely, but in general terms, Black is far behind in development. Also, White can try to place a very dangerous knight on the d6 square (that's the logic behind the e5 suggstion)

2

I suspect that we can't really use human performance as a barometer of advantage in 9LX games. Standard chess has been studied for hundreds of years, has boatloads of theory, has plenty of heuristics like developing knights before rooks, etc. A lot of this doesn't apply in 9LX. So humans (and maybe engines less so) will consistently play less optimal moves. ...

2

This is more like an extended comment than an answer... Actually, "draw by theory" can have two meanings. First, it's what QueensKnight already described - the theory is very deep, all deviations have been handled and are no good for the deviator, and the end position is not much to play on, since there are no "imbalances". (For example, ...

2

Hi Hauke: you didn't clarify on the n.0 versus n.5 ambiguity. There are several positions where h#3.5 is the shortest mate with White to move and White to mate: [Title "shortest helpmate is 3.5 (numerous)"] [FEN "brnqknrb/pppppppp/8/8/8/8/PPPPPPPP/BRNQKNRB w - - 0 0"] If you set this as Black to move, White to mate, then there are ...

2

First, worth noting that this question has nothing to do with chess. It is a programming question and a simple one at that. The answer is very simple. Write a program to read the files and parse them. The pseudo-code looks something like this: Read the file For each line find and extract any keywords like "WhiteELO", "UTCDate", etc. If ...

2

I have seen some games in chess 960 between Grand Masters and it seems that whatever the starting position is, the game normalizes quite early Perhaps worth starting by examining what has to happen for a 960 game to reach what you call a "normalized" position. For each bishop at least one pawn move which allows the bishop to move has to be made ...

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Searching on chess-results for "960" tournaments played in 2021 gives the following: 68th PCA Chess 960 Tournament 24th Jan 2021 W23 D0 B21 Первенство Владимирской области по шахматам-960 (rapid) W25 D3 B25 Турнир по шахматам 960, посвящённый 78-летию со дня рождения 11-го чемпиона мира по шахматам Роберта Фишера (rapid) W20 D7 B22 Відкрита ...

1

The engine. It’s Chess960 time at the TCEC! (https://tcec-chess.com) The more I watch these games, the more I feel that the gap between humans and engines is even higher in Chess960 than in normal chess. I loved the opening phase of this game between two of the less famous engines on show. I’m not sure I would have thought of any of Black’s moves! (...

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