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Questions tagged [rules]

Questions relating to the rules of chess

63
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5answers
13k views

When is castling possible?

Is castling possible if any of the squares involved in the castling are under attack, or is this a problem only if the squares moved through by the king are under attack and not the ones moved through ...
43
votes
2answers
8k views

When (if ever) was it a rule that pawn promotion was optional?

I'm reading a very old chess book ("The Chess Pocket Manual" by G.H.D. Gossip, copyright 1894), and I find this passage in it's section on "The Laws of Chess": When a Pawn has reached the eighth ...
38
votes
4answers
11k views

Arbiter ignored cheating, and I signed the scoresheet. Did I lose my right to object?

I am currently playing in an ELO tournament. Today, while I was playing, my opponent occasionally got up and walked around. At first, I did not care much. Then, I realized that some people were ...
31
votes
2answers
13k views

Is taking the opponent's king an illegal move?

In competition blitz games, making an illegal move and then pressing the clock forfeits the game if the opponent claims the illegal move as long as he does not make a new move, as a new move would ...
28
votes
3answers
11k views

Can a piece pinned to my king put the opponent's king in check?

I was playing a game with a friend online. A situation came up where he put me in check with his bishop, and I moved my rook to block it. His king was on the g file and my rook was on g2. The website ...
26
votes
2answers
19k views

I made an illegal move. What happens?

Especially in blitz or bullet games, it is possible that a player makes an illegal move, for example castles through check. If the opponent does notice the illegal move, then as far as I know the ...
24
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5answers
2k views

Rules: en passant and draw by triple repetition

A question of rulebook pedantry: One can claim a draw when the same position occurs the third time, the same player having the move. Two positions are not the same if the earlier allows a capture en ...
23
votes
6answers
8k views

What is sufficient mating material?

The FIDE chess rules describe that "The game is draw when a position is reached from which a checkmate cannot occur by any possible series of legal moves" (FIDE rule 9.6). This rules is sometimes ...
23
votes
3answers
61k views

What is the correct pawn promotion procedure?

This may be a frivolous question, as I believe that most chess players are good sportsmen, but I was wondering: what is the technically correct procedure for promoting a pawn to a queen? Do you ask ...
23
votes
2answers
2k views

When capturing en passant, is a position possible such that there is a pin over the square of the taken pawn, rather than the taking pawn?

I am trying to write a simple chess program, and as part of this I am writing methods to find all valid moves. I can detect pins and have no trouble leaving out the moves that would result in the ...
21
votes
3answers
6k views

Is it legal to play a move without hitting the clock?

In the game Andrey Esipenko - Nihal Sarin (2018 World Blitz Championship), after 7. Qb3 c4 8. Qc2 Sarin plays 8... Bf5, and before he hits the clock, Esipenko plays 9. Qc1, but since Nihal has not ...
21
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5answers
3k views

Is it a draw by insufficient material if the board is K vs K, N & N?

It isn't possible to force checkmate with King vs. King, Knight & Knight. A checkmate position, however, is still possible to achieve, so does that mean the 50 move rule applies, or does ...
21
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6answers
2k views

How should an arbiter handle copying moves from another game?

In 2004 the British illusionist, Derren Brown, despite being a very poor chess player scored +4 -3 =2 against 9 strong chess players including scoring 2/4 against 4 grandmasters in a simul. Of course ...
20
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3answers
3k views

Should you let your opponent know if they have forgotten to press their clock?

I'm in two minds here. The good sportsman says you should always let your opponent know (maybe limited to once per game). The more hard-nosed part of me says that managing the clock is part of the ...
20
votes
1answer
7k views

Is there a specific penalty for intentionally damaging chess pieces or the board?

If a player intentionally damages a chess set (e.g. breaks a piece in two, cracks the board, etc.), is there a specific penalty under FIDE rules? I'm not talking about moving pieces around ...
20
votes
1answer
5k views

When en-passant is the only legal move

Consider the following position: 8/7p/5K1k/8/7p/7P/5PP1/8 w - - 0 1 1. g4 hxg3 White plays g2-g4. The only legal move is hxg3. I heard someone say that since the en passant capture is optional, ...
19
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5answers
26k views

Why is castling through and out of check prohibited?

Why is castling disallowed when the king is in check or when the square the rook will be placed on is under attack? What is the rationale behind this ruling?
19
votes
1answer
6k views

Why is it illegal to move into check?

In chess, it is against the rules to move into check, or to not move out of check. But why? Obviously, if you went against this rule, you'd immediately lose. But it seems strange to make it illegal to ...
18
votes
4answers
776 views

How quickly must a move be completed?

I was playing in a tournament once, during a sequence of captures, my opponent could recapture my Knight about 4 different ways. He just removed it and carried on thinking. What should I have done?
18
votes
1answer
6k views

If a chess board is disturbed, can the game continue?

Let's say I'm playing a game that has technically begun (white has moved) and then the board is disturbed: say a minor earthquake shakes the pieces off the table or something. Clearly no-one has ...
17
votes
7answers
104k views

With only the King left, how can you get a draw?

Let's say I have only the King left. I've read several rules and posts of people saying there is a limit to the number of moves your opponent has to check mate you in, but there are some ...
17
votes
2answers
7k views

Why can't the king castle in this position?

In a video I'm watching (requires register), with this setup, the instructor says The king cannot escape, he cannot castle king side or queen side, because of the white's pressure on e7 [...]. ...
17
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2answers
3k views

What does “TPR” mean in chess tournament reports?

I usually find in reports like this (and many others) something like: ... with a TPR of 2551 ... I would like to know its meaning, and also what it stands for.
17
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1answer
3k views

Carlsen - Inarkiev game illegal moves

In the first round of the World Blitz Championship in Riyadh Magnus Carlsen played Ernesto Inarkiev and the game ended strangely. [FEN ""] [StartPly "53"] [Event "World Blitz Championship"] [Site "...
17
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1answer
2k views

Is it legal to move a piece if your opponent has not hit the clock?

I have played some rapid and blitz games in my city, it was not a tournament, but a friendly match, but there's something that bother me almost always that I've played: I move my piece and as my hand ...
17
votes
1answer
2k views

Is it permitted to stare at a blank chessboard during a tournament game?

Long-winded Motivation I have recently noticed during my own tournament games that I am not infrequently closing my eyes, or at least looking away from the board, when engaged in in-depth calculation ...
17
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4answers
1k views

Is it allowed to prepare for a game after the round has started?

At the recent US Open I started the tournament well and was paired against a GM in the roped-off area. I had worked out the pairing well in advance and was able to do some fairly heavy openings ...
16
votes
5answers
4k views

Why does a touched piece not have to move in online play?

There is a rule of playing the game of chess that a touched piece of one's own should be the one to move. I have always been taught by professional trainers from early childhood that this is the ...
16
votes
4answers
30k views

Can a pawn put a king in check?

I am only an amateur player, but have been playing for many years. Every now and then I come across people who are adamant that a pawn cannot put a king into check. The last person who I discussed ...
16
votes
1answer
4k views

Distracted by opponent's habit of spinning captured pieces

Many players have the habit of spinning and flipping captured pieces, e.g. Nakamura, Gelfand, Van Foreest, etc... However, when it is in my field of view, it distracts me and it brings me out of my ...
16
votes
1answer
12k 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....
15
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5answers
1k views

When and why was the notation changed from descriptive to algebraic?

When I was young I used to play chess with the the old form of notation KB (King Bishop square number), even books used to have the same notation, then later found that everyone was using algebraic, ...
15
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1answer
3k views

When does a chess clock start?

Lichess.org starts the clock of each player after their first move. Chess.com starts the clock when the players agree to a match, before their first move. I think Lichess is correct, that's what we ...
15
votes
3answers
4k views

How did castling originate?

Castling to me has alwayes seemed like such a huge leap in terms of game play that I've always wondered how it came to be. Does anyone know the history behind how and why castling came to be?
15
votes
2answers
617 views

Is it legal to hit the clock with piece, captured or otherwise?

I have often seen in blitz games that when a player captures a piece and then hits the clock with the piece. Is that a legal move or is the player required to place it on the table and hit the clock ...
14
votes
10answers
5k views

How to balance the game for uneven players

I want to play chess with my wife, but we have different ranks (I am approximately 1900, and she is ~1500 (probably less based on comments)). Normally, our games are boring for me. I tried to balance ...
14
votes
5answers
81k views

Is it possible to checkmate with knight and king against king?

I would like to clarify two things: Is it possible to checkmate with only a knight and a king against a lone king? What will happen when one side has a king and knight and the other has just a king, ...
14
votes
5answers
3k 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 ...
14
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2answers
2k views

Elo loss for resign vs checkmate

Is there a difference in the amount of ELO a player loses from resigning versus being checkmated? If so - What is the difference in the calculation?
14
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2answers
10k views

Do the official rules of chess forbid promoting a pawn to a piece of the opposite color?

Not that it would be everyone's first choice, but it is possible to concoct positions where having an extra piece block your opponent's moves and thus gives you an advantage (think blocking an escape ...
13
votes
1answer
7k views

If I touch a piece with my forearm by accident, can my opponent call touch-move? [duplicate]

If I touch a piece with my forearm by accident, can my opponent call touch-move? If the answer is "no", what if after my opponent calls touch-move, I believe him and move the touch piece before ...
13
votes
3answers
5k views

pressing the clock using the same hand you use to move the pieces?

I participated in a club and went to training, the guy against me is right handed, so he placed the clock on the right. I'm left handed, so I play with the left hand and press the clock with the ...
13
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3answers
3k views

What are the possible results of a game?

What is the range of possible results of a chess game? I am asking this question, because I am developing an XML schema for recording chess games; sort of like an XML version of PGN, and I need a way ...
13
votes
2answers
515 views

Delay clock with delay not set

Over the past few years of tournament play, I've seen three games where the delay was not enabled on a digital clock. In all of these cases, the clock was a Chronos set to display HH:MM until the ...
13
votes
2answers
2k views

The history of the 175-move draw rule

The U.S. Chess Federation piloted a 175-move draw rule in the fourth edition of its Official Rules. This interesting rule ended a game automatically after 175 moves, whether or not either player had ...
12
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5answers
1k views

Hitting Clock Without Moving

In an official blitz game what happens if a player hits a chess clock without making a move? I believe that making an illegal move in a blitz game is an automatic loss but does this count as an ...
12
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2answers
1k views

Is it allowed to talk to your opponent in a tournament game?

Suppose my opponent in a tournament was running very low on time, and after move 40, presses the clock and leaves the board for a while, falsely believing they will get extra time on their clock. ...
12
votes
2answers
782 views

Can doping increase/decrease a player's level of play?

The reason I ask this is because according to this article, Magnus Carlsen is going to participate in FIDE's pilot project on doping test. FIDE says the reason behind it is that the organization ...
11
votes
2answers
921 views

Touch-move when move is illegal but opponent's piece can be captured by another piece

This is the scenario: I pick up my Knight to capture my opponent's Bishop (touching the Bishop). I then realise my Knight was pinned to my King in the first place, so moving it would be illegal. ...
11
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5answers
1k views

What is the result? (Rules + puzzle)

[EDITED to include followup - EDIT 2 to include definition of position] This is in part a genuine question on the FIDE Laws of Chess, and in part a small puzzle to solve. Suppose that during a long ...