Skip to main content
56 votes
Accepted

Why did this legendary game of Carlsen vs Nakamura not trigger threefold-repetition after move 5?

While the position might seem like it has been reached 3 times at that point, that is actually only the second time they have reached that position because the first time they were in this position, ...
brekker's user avatar
  • 829
54 votes
Accepted

Why is flagging considered a win?

I feel like you somewhat misunderstand the concept of a time control. The clock is a part of the game. If you are up a piece in a complicated position with five seconds left on the clock that may well ...
koedem's user avatar
  • 3,451
26 votes

Why is there no rule allowing a player to claim a draw in lonely king endgames?

Why is there no rule allowing a player to claim a draw in lonely king endgames? For the simple reason that there is no need. If you are the player with the extra material you can offer a draw and be ...
Brian Towers's user avatar
  • 98k
25 votes
Accepted

Should an arbiter claim draw at a K+R vs K+R endgame?

You can declare a draw and in fact you are required to declare a draw but only after you have counted 75 moves by each side without a capture or a pawn move. This is according to the FIDE Laws of ...
Brian Towers's user avatar
  • 98k
25 votes
Accepted

Moving into check for a draw as black, why is it illegal? Comparison to Racing Kings

Imagine a variation of chess without the rules about check and checkmate, where a player wins simply when he captures his opponent's king. In this variation, Kxd5 loses the game to exd5. Turns out, ...
MattPutnam's user avatar
24 votes

Why is flagging considered a win?

Let's look at the title question from the perspective of engine chess, which is more objective in the sense that you can get two engines to play tens of thousands of games against each other at ...
Allure's user avatar
  • 27.7k
20 votes

Why is flagging considered a win?

Because not having it would result in some perverse incentives. In particular, in any game where a draw is an acceptable outcome, the optimal strategy without flag drops being losses would be to never ...
user3482749's user avatar
18 votes

Moving into check for a draw as black, why is it illegal? Comparison to Racing Kings

Those are just the rules of the game. You could absolutely try to make the case that moving into check in such a situation should be legal, but playing by those rules wouldn't be chess anymore (it ...
Inertial Ignorance's user avatar
17 votes

Moving into check for a draw as black, why is it illegal? Comparison to Racing Kings

I will answer from a different perspective: why Racing Kings (RK) has a rule to allow black a chance to draw, and why the same logic doesn't apply to chess. What is Racing Kings (RK)? Background for ...
Remellion's user avatar
  • 5,040
16 votes
Accepted

Rules: Is this position a draw?

This is a better question than it seems at first glance. Intuitively it seems possible to claim a draw, since the position appears to have occurred three times. However, according to a strict ...
Remellion's user avatar
  • 5,040
16 votes

Should an arbiter claim draw at a K+R vs K+R endgame?

It is not a drawn position according to the rules, since there is sufficient mating material. It may be a draw from the point of view of endgame theory, but given players who make lots of mistakes, it ...
itub's user avatar
  • 10.6k
16 votes
Accepted

Does a draw on the board need to be declared before the time flag is reached?

There are three articles in the FIDE Laws of Chess which are relevant here: 5.2.1 The game is drawn when the player to move has no legal move and his king is not in check. The game is said to end in ‘...
Brian Towers's user avatar
  • 98k
15 votes

Does a draw on the board need to be declared before the time flag is reached?

This was undoubtedly a draw. FIDE rules, emphasis mine: 5.2.1 The game is drawn when the player to move has no legal move and his king is not in check. The game is said to end in ‘stalemate’. This ...
RemcoGerlich's user avatar
  • 28.1k
13 votes
Accepted

Does threefold repetition apply in a rapid game?

TL;DR: Claiming draws based on threefold repetition or the fifty-move rule is possible in rapid and blitz games as well. Contrary to RemcoGerlich's answer, it is not strictly necessary to record the ...
chaosflaws's user avatar
  • 1,789
13 votes
Accepted

Is it OK to look at the list of played moves during the game to determine the status of the 50 move rule?

The rules for this and how it works are spelled out in articles 9.3, 9.4 and 9.5 of the FIDE Laws of Chess. They don't mention whether or not you are allowed to check your scoresheet to do this ...
Brian Towers's user avatar
  • 98k
13 votes
Accepted

Was this a valid draw?

No, it was not a draw. For a draw by three-fold repetition, the exact position, and all of the possible moves (castling and en passant, which since en passant can only happen on the move, in essence, ...
PhishMaster's user avatar
  • 32.6k
13 votes

Why is flagging considered a win?

Since you specifically asked for historical reasons: Think about your two proposed criteria in the context of the year 1800 or 1900. Using engine evaluation is obviously out of the question. So is &...
Annatar's user avatar
  • 5,938
12 votes

Do the rules of chess state that a Bishop+King can be sufficient mating material?

First, Carlsen, despite having only the Bishop, WON that game. So it is not about mating material, but about ANY possible mating position, and there was one here. The rule at hand is this: ...
PhishMaster's user avatar
  • 32.6k
11 votes
Accepted

Can Loss by Checkmate be Avoided by Invoking the 50-Move Rule Immediately After the 100th Half-Move?

Can player B invoke 9.3.2 to avoid the loss by checkmate? No. A player can only invoke the 50 move rule if the game is still being played. Checkmate ends the game. Once the checkmate is on the board ...
Brian Towers's user avatar
  • 98k
10 votes
Accepted

Can you claim a draw, after the position has changed, if threefold repetition occurred earlier?

(I consider the FIDE rules to be the "the rules of chess" and this answer is only about them) No, you cannot claim. In fact your right to claim ends as soon as you touch a piece. Here's what ...
RemcoGerlich's user avatar
  • 28.1k
9 votes

Why is flagging considered a win?

Except for exceptional circumstances, only three results are considered valid for a chess game (and the corresponding rating change): win, draw or loss. Your suggestion would come with a huge problem: ...
David's user avatar
  • 16.3k
9 votes

What happens in a King-Rook vs King-Bishop with a perfect play in a no pawn endgame?

See Pawnless Chess Endgame on Wikipedia: Rook versus a bishop: this is usually a draw. The main exception is when the defending king is trapped in a corner that is of the same color square as [their] ...
Allure's user avatar
  • 27.7k
8 votes

Why is flagging considered a win?

It's considered a win because that is what it is by definition from the rules of timed games. When you enter a game you commit to its rules; in this case one of those rules is that the time you have ...
Stacker Lee's user avatar
8 votes
Accepted

When can a player with just a bishop/knight vs overwhelming material claim a win on time?

When can a player with just a bishop/knight vs overwhelming material claim a win on time? A win on time can be claimed when it is possible to "checkmate the opponent's king by a series of legal ...
Brian Towers's user avatar
  • 98k
8 votes
Accepted

What happens after repeated incorrect draw claims?

Can he stop the clock and call the arbiter? A player can always do this. However, according to the rules: 6.11.4 If a player stops the chessclock in order to seek the arbiter’s assistance, the ...
Brian Towers's user avatar
  • 98k
7 votes
Accepted

how does a uci engine draw or resign?

UCI chess engines don't offer/accept a draw, nor resign a position. This is the GUI's responsibility. You are welcome to add new uci options (setoption and option) for your engine, but don't expect ...
SmallChess's user avatar
  • 22.5k
7 votes

Does a draw on the board need to be declared before the time flag is reached?

That's an easy one: stalemate ends the game automatically. FIDE 5.2.1. rule. Neither flag, nor handshaking, nor signing the scoresheet change this. What to do: 1. Play safe, inform an official. 3., ...
Hauke Reddmann's user avatar
7 votes
Accepted

Can the game end in multiple ways at the same time?

Can a player make two claims simultaneously? No. When you make a draw claim your are asking the arbiter to perform the task of investigating / verifying your claim. One arbiter can only investigate ...
Brian Towers's user avatar
  • 98k
7 votes

Can the game end in multiple ways at the same time?

You could try to complete your second illegal move in a position your opponent cannot win while simultaneously agreeing to a draw at exactly at the same time that your flag falls, but closer ...
D M's user avatar
  • 19.6k
6 votes

How did this game end in a draw?

There was a three-times repetition. Note that only the position needs to be repeated, it is not necessary that the moves leading to the position are the same. The position occurred first after move 58,...
Sir Cornflakes's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible