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54 votes

Can all 64 squares be attacked or defended by the eight pieces?

If the two bishops travel on the same color squares, then all 64 squares can be covered by the eight pieces. However, if the bishops must travel on opposite colors, then the maximum number of squares ...
49 votes
Accepted

Why does Stockfish undervalue pawns when compared to the classical "a piece is worth three pawns" approach?

I am not an expert on stockfish source code, but my understanding is the following. Humans: It is true, that the 1 piece equals 3 pawns approach is pretty accurate, surprisingly so. However as you ...
  • 20.5k
34 votes
Accepted

Should a player be forced to move a piece that he has picked up after a spectator knocked it off the board?

I am not an arbiter, but here's what the rules say: Rule 4.3 (emphasis added) if the player having the move touches on the chessboard, with the intention of moving or capturing I think it should ...
  • 10.3k
31 votes
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What are "full piece" and "half piece" in chess?

blundering a full piece or being a full piece down are typical expressions in English chess literature. With the little word "full", the author wants to make clear that the player has not ...
  • 5,829
30 votes

Are pawns pieces?

I think a "piece" in the chess context is typically shorthand for the more specific terms of a "minor piece" (Knights and bishops) or a "major piece" (Rooks and Queens). ...
28 votes
Accepted

FIDE Laws: what exactly does 'colours reversed' in 7.3 mean?

I'm not sure what 'colours reversed' means in this rule. It is really very simple. Suppose you and I are playing in a Swiss tournament. The draw shows that you are to play white against me in the ...
  • 80.8k
27 votes

Is it legal to take a piece to the bathroom during a tournament?

There are a number of serious things wrong with what you describe: While they are thinking and holding the piece You may hold a captured piece while you think but you may not hold a piece that is ...
  • 80.8k
23 votes

Chess set icons

PyChess has about 20 fonts and SVGs bundled in its source code:
  • 331
21 votes
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Do any grandmasters win more with black than white?

The short answer Yes, they do, although very few GMs do and by a margin of less than 10%. This does not seem to be due only to random factors (see long answer). An example is GM Joseph Gallagher. As ...
  • 3,233
20 votes
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Pressing the clock using the same hand you use to move the pieces

The numbers refer to rules in the FIDE laws of chess. 6.2. A player must press his clock with the same hand with which he made his move. It is forbidden for a player to keep his finger on the clock ...
  • 3,435
19 votes
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What should a player do in blitz if he knocks a piece on to the floor after pressing the clock?

The relevant section from the rules would be Article 7.4.1: If a player displaces one or more pieces, he shall re-establish the correct position in his own time. The rules do not specify a ...
  • 1,799
18 votes

Can a player be forced to adjust a piece?

When FIDE tournament rules apply: If you displace one or more pieces – knocking off the board, intentionally or unintentionally, is a displacement – you have to re-establish the correct position on ...
18 votes

What is right way to set up King & Queen In the beginning of game?

It starts with the board being setup correctly, and that means a light square in the right-hand corner. Then, the queens each go on their own color. [FEN ""]
  • 32.1k
18 votes
Accepted

Can I move a piece somewhere else if I left it but didn't press the clock?

When I first started playing competitive chess 50 years ago what you describe was standard practice in blitz but not allowed in standard time control chess. Nowadays it is not allowed at all except in ...
  • 80.8k
17 votes

Pressing the clock using the same hand you use to move the pieces

Yes, press the clock with the same hand you use to move pieces is an actual rule in official tournaments (see Article 6.2.b of the FIDE Laws of chess). Concerning the placement of the clock before ...
  • 171
17 votes

Can a player be forced to adjust a piece?

According to the Laws of Chess: 7.4.1 If a player displaces one or more pieces, he shall re-establish the correct position in his own time. Of course, in this situation, it is not the player who ...
  • 15.8k
15 votes
Accepted

Chess set icons

You might look for a chess set font. Here are several. Licensing information is included. It looks like they have been scanned from old books in some cases.
  • 19.9k
15 votes

Should a player be forced to move a piece that he has picked up after a spectator knocked it off the board?

When did this happen? Because there is no reasonable interpretation of the current rules by which a TD should have upheld the touch-move claim. I went back and looked at the 3rd Edition rulebook, ...
  • 3,469
15 votes

Was there a chess piece—elephant, knight or rook—rendered as a being looking into two directions?

In shatranj, the game out of which chess developed, the rukhs (rooks) are portrayed a bit like the way you describe. That Wikipedia article contains this illustration of a 12th-century Iranian ...
  • 5,820
14 votes
Accepted

Why is the rook worth 5 points while the bishop is only worth 3?

Have a look at the wikipedia article on relative chess piece values, it provides an extensive discussion on the matter. To see how you can compare two given pieces, let's consider your bishop vs rook ...
  • 11.9k
14 votes

What are "full piece" and "half piece" in chess?

I don't think "full piece" means anything beyond "piece" but "full" was added for emphasis. This is to highlight the magnitude of the blunder, since many blunders are smaller than a piece; for example,...
  • 10.3k
14 votes

What is right way to set up King & Queen In the beginning of game?

First the board must be correct. Put the white square in the right hand corner nearest to you. Then put the queens on their color in the center of the board on the row closest to you. White queen on ...
13 votes

Chess set icons

Unicode has chess piece icons in it. http://en.wikipedia.org/wiki/Chess_symbols_in_Unicode This means you could look for a font which includes the chess symbol unicode block and has a license which ...
  • 131
13 votes

Do any grandmasters win more with black than white?

White scores about 54%, which is quite different from White winning 54% of all game, more so considering how draws occur more often between stronger players. None of the top players score better as ...
  • 13.2k
13 votes

Can there be a checkmate with maximum points of material (103) while covering 64 squares?

As per Hauke's invitation, here is an optimal proof game for such a position. This is optimal because a queen must move to give the Black king a square and forty pawns moves must take place. White's h ...
12 votes

Why is the rook worth 5 points while the bishop is only worth 3?

You need to understand that the point system is only a rough guideline meant to assist you in evaluating positions or in deciding on potential exchanges. Many factors, particularly the pawn structure, ...
  • 20.5k
11 votes
Accepted

What are the quckest helpmates delivered by the rook, knight, bishop, and pawn?

Here's what I came up with. Bishop took me 3 moves: [FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"] 1.e4 f5 2.Be2 g5 3.Bh5# * Knight took me 3 moves as Black: [FEN "rnbqkbnr/...
  • 15.8k
11 votes

Are pawns pieces?

No, the word "piece" does not include pawns. We can see this in some common phrases. A "minor piece" is a bishop or a knight – pawns are even more minor but don't count as minor ...
  • 5,820
10 votes
Accepted

Is It Good Or Bad To Trade Too Much?

Trading for the sake of trading is bound to be in your opponent's favour more often than not. Generally speaking, recapturing often activates the piece that can capture back. Consider two rooks on an ...
  • 26.4k
10 votes
Accepted

How to determine the value of a piece from scratch?

It's possible to use logistic regression (a statistical method) to estimate the predictive values. This way, you wouldn't need anyone to try the game at all. http://www.sumsar.net/blog/2015/06/big-...
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