All Questions

Filter by
Sorted by
Tagged with
1 vote
0 answers
23 views

History of private sponsorship of GM titles

According to this chess.com article "Jeanne Sinquefield Offers Historic $100,000 Awards To New Female Grandmasters In U.S" In a groundbreaking initiative to support women's chess, Saint ...
Brian Towers's user avatar
  • 98.3k
2 votes
3 answers
51 views

King-and-pawn endgames: Is it usually best to move your king first?

Is it true that, at the start of a king-and-pawn endgame, players should generally advance their kings to the center prior to any pawn moves? I wouldn't expect this to be true in every case, but is it ...
Doubt's user avatar
  • 173
3 votes
1 answer
108 views

Have problems similar to this recent composition of mine been done before?

N1Nrk2r/n1ppp1p1/1pQ5/1P6/5R1P/3P3B/3PP1Pp/R3K1B1 w - - 1 13 Checkmate in two moves. AP (Type Keym + Type 3) The AP Convention (A Posteriori) states: "If the player needs castling rights in ...
Элси Ринген's user avatar
1 vote
0 answers
70 views

Photo of Marcus Kann?

Does anyone know if this photo is in fact Marcus Kann? Are there any better photographs that exist of him?
Paweł's user avatar
  • 173
4 votes
2 answers
2k views

Is there any position where giving checkmate by En Passant is a brilliant move on Chess.com?

I have seen many en passant checkmates, but I have never seen one that was a brilliant move. Is there any position where giving checkmate by en passant is a brilliant move on Chess.com?
Jonah Hodge's user avatar
1 vote
1 answer
105 views

Double move chess

Sometimes my pupil may play the game having always 2 moves. (I of course play only 1.) The exact rules vary due to strength, especially regarding checks, let's try worst case: Black may capture and ...
Hauke Reddmann's user avatar
0 votes
1 answer
100 views

In how many ways can a black king get checkmated by 2 rooks?

Given an nxn chessboard, how many times can a black king get checkmated by 2 rooks (occassionally with the help of a white king)? Is there a mathematical formula that can be brought up? How many ...
tend  tendonintendo's user avatar
1 vote
1 answer
66 views

Process of reconnecting rating for a large country that been excluded from FIDE for a many years

If a large country with a population with many active chess players was expelled from FIDE for many years how would the rating system be reconnected? They would have hundreds of thousands of players ...
Ian Ringrose's user avatar
  • 1,029
4 votes
1 answer
122 views

Longest forced win with a rook

What is the longest forced checkmate where the winning side has only a rook? I know this position where White has a mate in 67: [FEN "2K4k/7p/8/8/8/8/3R4/n7 w - - 0 1"] 1. Kd7 Nb3 2. Rb2 ...
Lucenaposition's user avatar
6 votes
1 answer
100 views

Strategies specific to bullet chess

I have reached 2200 bullet on Lichess, and want to start preparing chess specifically to get better at bullet. Just like chess as a whole has strategies and techniques to learn, I wanted to know what ...
A.Shetye's user avatar
  • 706
1 vote
1 answer
106 views

Are all moves or types of moves (see details) in chess possible?

Inspired by this video The rarest move in chess, in which moves are categorized based on the format of their algebraic notation, so for example the rarest type of move (according to the author and ...
alices_and_bobs's user avatar
4 votes
3 answers
3k views

What's the maximum amount of material that a puzzle with unique solution can have?

It's OK if the position is impossible to reach as long as it's (forward-rules wise) legal, like a board with nothing but 2 kings and queens.
alices_and_bobs's user avatar
2 votes
0 answers
80 views

A game I might have read about, Kasparov had to analyse an opening line from scratch and ended up winning anyway?

If my memory isn't tricking me, didn't Kasparov once get a game where early in the opening he didn't know the line, so he sat down for 45 minutes and worked out that the best move is Qc7, and went on ...
Chris Sanders's user avatar
-1 votes
1 answer
107 views

Why isn't there a chess 'GPT' right now? [closed]

I think the way Large Language Models (like ChatGPT) work are extremely well suited for chess. Here is why I think so: LLMs generate text using next token prediction. This is exactly how chess works -...
Chinmay The Math Guy's user avatar
5 votes
2 answers
1k views

Why does White castle into Black's attack in the King's Indian, and then run away afterwards?

Inspired by the Nakamura/Rozman vs. Naroditsky/Hess team game a few months ago. [FEN ""] 1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. h3 O-O 6. Be3 c6 7. Nf3 Na6 8. Bd3 e5 9. d5 Nh5 10. O-O!? ...
Allure's user avatar
  • 27.9k
1 vote
2 answers
72 views

Conversion of Scid Datbase to PGN with only .sg4 and .sn4 files, missing .si4 file

I am trying to recover a scid database from 2019, but only have the respective .sg4 and .sn4 files left and am missing the .si4 file. From my understanding, the actual game data is stored in the .sg4 ...
huskywithahat's user avatar
1 vote
0 answers
76 views

Has anyone ever seen something like this in an actual game?

I came across this puzzle at IM Yaacov Norowitz's site (https://www.yaacattack.com/dachastairway), and although it's really interesting, I'm curious if anyone has seen this in an actual game.
Joshua's user avatar
  • 19
1 vote
0 answers
33 views

How to make pgn-extract duplicate detection consider headers?

I have a large-ish pgn composed from multiple sources - logically it has a lot of duplicate games. I tried to filter it using pgn-extract duplicate detection: pgn-extract --duplicates dupes.pgn --...
Matija Sirk's user avatar
  • 2,603
-1 votes
3 answers
124 views

Is a mechanical, Turk-like, purely mechanical self-moving chess set with decent AI possible?

We all know the Mechanical Turk was a dummy machine controlled by human players. However, given technology has progressed, it theoretically possible to build a purely mechanical (no modern electronics)...
alices_and_bobs's user avatar
2 votes
1 answer
49 views

What is a FIDE "adjusted rating floor"?

The FIDE norm regulations use the phase "adjusted rating floor" without defining it in the same document, how is it defined? What are the conditions for being allowed to raise a rating floor ...
Ian Ringrose's user avatar
  • 1,029
9 votes
3 answers
1k views

How to pull ratings from Chess.com and Lichess automatically?

We use a chess club and class management system that gets up to date ratings from ECF (English Chess Federation). Is it possible to do the same for Chess.com and Lichess and how?
Al Martins's user avatar
0 votes
1 answer
46 views

What is a Norm “Super Swiss”?

I have seen the term Norm “Super Swiss”, what is it and how are the rules for getting norms different from other tournaments?
Ian Ringrose's user avatar
  • 1,029
2 votes
1 answer
230 views

What is a norm factory?

What is a norm factory? Are they a real issue? I see random claims about them them but not real data. Have any real data been published in them? I expect if 7 players are being charged a lot to enter ...
Ian Ringrose's user avatar
  • 1,029
3 votes
0 answers
48 views

Why is Kateryna Lagno's federation given as RUS while other Russian players' federations are given as FID?

In the June 2024 rating list, Lagno's federation is given as RUS, while Goryachkina, Shuvalova and Garifullina's federations are all FID. Why don't they all have the same federations?
Allure's user avatar
  • 27.9k
6 votes
3 answers
165 views

Simplest position where promotion to rook is unique drawing move

How many pieces and pawns are needed for a position where: White has only one move to draw That move is a rook promotion All other moves by white lose I know this position with 9 pieces and pawns: [...
Lucenaposition's user avatar
0 votes
3 answers
144 views

Why not let players occasionally take back moves or try different variations in serious classical games?

Sorry if it sounds sacrilegious, you all probably know which move I'm talking about. (Edit: for future readers, it's the latest mate-in-2 blunder by the current World Champion Ding against Magnus ...
alices_and_bobs's user avatar
3 votes
1 answer
371 views

Are chess federations allowed to hold tournaments outside their areas to save hotel costs?

As an example, a week in a full board hotel in Spain with easy access to an airport that has cheap daily flights to many UK airports outside of peak holiday season is cheaper (including cost of flying)...
Ian Ringrose's user avatar
  • 1,029
1 vote
1 answer
52 views

What define a tournament as a "Open"

I used to think an open tournament was by definition open to everyone who was willing to pay the entry costs, but it is clear that some "Open" tournaments are not. So what is the definition?
Ian Ringrose's user avatar
  • 1,029
2 votes
0 answers
45 views

How to make engine evaluation show difficulty of finding right move sequence, not just who's better with perfect play?

Inspired by a recent video where Magnus Carlsen was surprised that the engine thinks his position was a draw. Even top players may find a position considered winning can actually be drawn with perfect ...
alices_and_bobs's user avatar
0 votes
0 answers
63 views

Who proposed that S stand for knight in English chess problem notation?

A small barrier to entry to the chess problem world is that knights are denoted "S" rather than "N". This confusing usage comes over as snooty and precious, but unfortunately we ...
Laska's user avatar
  • 12.1k
3 votes
2 answers
702 views

What is the typical rating difference between players in rated games?

As people tend to like playing games when the outcome is not known before they start I would expect most games to be between players when the rating difference is not much more than 200. Is this the ...
Ian Ringrose's user avatar
  • 1,029
0 votes
0 answers
14 views

What proportion of FIDE rated games are from swiss tournaments?

I assume most rated games are played in swiss tournaments, but have anyone looked at the data to see if this is case?
Ian Ringrose's user avatar
  • 1,029
0 votes
0 answers
35 views

Why didn't/don't all chess armageddon have auction?

Quote: Armageddon Chess is a fair tie-break system only if the two players bid for how much time Black should have. Foolishly most times I see Armageddon specified there is no bidding. Instead the ...
BCLC's user avatar
  • 2,162
2 votes
1 answer
53 views

Why not keep opponents anonymous (hide their identity) in elite events?

Without changing the format, ensuring the correct number of games are played between the correct players, but hide the identity of who's playing who while the game is in progress (from the players, ...
alices_and_bobs's user avatar
1 vote
1 answer
57 views

Help for Building a Chess Engine in Python

I am building a chess engine in python, as a project for school. I am required not to use any engines of course, but I am allowed to use the chess module. The code I tried to develop uses a rough ...
Chris Wong's user avatar
1 vote
1 answer
30 views

What value of K is used when when a player is removed from FIDE rating list due to dropping below 1400?

My FIDE rating recently went under 1400, hence I lost my rating. I have K=20 at the moment. So my question is what will be the K from now on? 20 or 40?
mic sc's user avatar
  • 11
2 votes
1 answer
169 views

Why is my performance low even with a high accuracy on chess.com?

I am a chess beginner and recently played a game on chess.com in which I had an accuracy of 90.6% which is even higher than some games of GMs on the site. However , the elo performance was still 1300 ...
An_Elephant's user avatar
0 votes
1 answer
60 views

How to analyze new opening, in a tournament time-frame, as an intermediate?

This is a hypothetical question as I'm not actually taking part in tournaments but the question is I think worth posing. I was non-chalantly playing this as black against a chess.com bot: [StartPly &...
Chris Sanders's user avatar
0 votes
0 answers
24 views

Largest Elo variance for a GM

Too theoretical If you care to look at my national rating over time (available at the German federation), you might think I bag sand. Nope, that's normal for me. Extreme, but not unique, I guess. Let'...
Hauke Reddmann's user avatar
-1 votes
2 answers
600 views

Why don't Hikaru, Fabi & Nepo buy out Liren so the 3 of them have a playoff to face Gukesh? [closed]

Edit on opinion-based close vote: It's most likely. 1 of my assumptions is wrong. I mean to ask which of the assumptions are wrong. However, if none of the assumptions are wrong, then I think this ...
BCLC's user avatar
  • 2,162
0 votes
1 answer
30 views

What are the downsides of letting the reigning champion choose the format of the championship (within reason)?

What's the point of having a championship match if the winners must regularly grind for months or lose everything, or worse, come out broken or burnt out? I don't mean going back to the wild days of ...
alices_and_bobs's user avatar
-1 votes
0 answers
31 views

If an armageddon bid is drawn, then is it fair to force a re-bid?

Re In armageddon bidding, what happens if the bid is drawn? In 2023 or 2024 Champions Chess Tour, I heard they re-bid. My assumptions: If they bid the same, then they needn't re-bid. They can flip a ...
BCLC's user avatar
  • 2,162
-1 votes
0 answers
51 views

Roulette as tiebreak in 1983 candidates

From What are some cases where a drawn match went to the player w/ more black wins? : In the 1980 – 1981 candidates, where Lajos Portisch, as black, beat Boris Spassky in the 1st game of their ...
BCLC's user avatar
  • 2,162
-1 votes
1 answer
23 views

What are some cases where a drawn match went to the player w/ more black wins?

In some round robins or swiss, there are score tiebreakers based on black wins, like the 2022 Accentus Chess960 tournament. Never mind those. My question is for knockouts. Obviously this doesn't work ...
BCLC's user avatar
  • 2,162
-1 votes
1 answer
46 views

What happens if drawn matches are decided by black wins (if any)?

In some round robins or swiss, there are score tiebreakers based on black wins, like the 2022 Accentus Chess960 tournament and the 2023 USCC. Never mind those. My question is for knockouts. Obviously ...
BCLC's user avatar
  • 2,162
-2 votes
1 answer
109 views

Can a superGM always draw another as white?

Review of related literature: Previously this was asked for GMs regardless of colour: 1.1 - Why do many people think that top grand masters can always reach a draw? 1.2 - Can a grandmaster always ...
BCLC's user avatar
  • 2,162
0 votes
0 answers
25 views

What makes alternative winning conditions good or bad in chess variants?

For chess variants that keep all or most of chess movement rules but with different winning conditions (can be in addition to the normal winning condition or replacing it), what properties/...
alices_and_bobs's user avatar
1 vote
0 answers
30 views

What the max possible USCF rating of a player after playing in an under 1400 tournament?

Assume a player is over 18, and has played 40 UCSF rated games. Then the player wins 5 games in a 5 round under 1400 swiss, what is the max possible rating of the player after the tournament? (Assume ...
Ian Ringrose's user avatar
  • 1,029
1 vote
0 answers
42 views

Are there any large swiss with good playing standard that are not rated?

Chess players who are improving in the USA have good reasons to avoid increasing their ratings as prize money is often high in tournaments with a rating ceiling. The rules for such tournaments ...
Ian Ringrose's user avatar
  • 1,029
2 votes
1 answer
127 views

Why do some common openings move a pawn in front a bishop prior to moving the king's or queen's pawn?

I've seen several people do this and assumed it was a beginner's mistake (since I'm a beginner myself and I play on the chess.com app usually only against other players within 25 points of my rating), ...
Mikayla Eckel Cifrese's user avatar

15 30 50 per page
1
2 3 4 5
183