A move that doesn't respect the rules of chess.

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5
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1answer
90 views

How to create PGN notation with wrong moves in it?

I was as chess trainer with some young guys on a tournament, and wrote down some of their games. In nearly every game, there were wrong moves in it: king is in check, but does not move or react; ...
0
votes
0answers
52 views

Rook and knight move together

This is my first question on chess beta and I don't know if I'm insane or if the cpu is broken. So I was playing chess against a CPU on the iPhone with the app 3D Chess Game, and the CPU (playing ...
1
vote
2answers
93 views

According To fide rules, what should happen in this situation

In a last round tie between 2 players fighting for top seed in a competition here is what happened. White had 18 sec on his clock and black had 26sec. Black was winning. At move 56, black made a pawn ...
0
votes
4answers
165 views

Is it possible to play 1 minute bullet with no increment over the board?

Playing 1 minute bullet with no increment on the internet is already hard... but what about over the board? i.e. in real life with an actual wooden board. Would it be possible or would 90% of the ...
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vote
2answers
2k views

Moving king into check

Can a player move their king into check if the opponents piece that is able to take king, is putting opponents king in check?
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votes
2answers
114 views

Is this move valid in the rollerball chess variant?

Can the white King move a space to the right, into the original location of the black king? This would be disallowed in standard chess, as one cannot intentionally put themselves into check. However, ...
1
vote
2answers
138 views

Illegal move or forfeit on time - who wins this 5-minute match?

In a 5-minute match a player makes an illegal move leaving his king in a check position. This usually gives the victory to the opponent, if he sees it and captures the king. Otherwise, if the opponent ...
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votes
3answers
6k 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?
5
votes
2answers
664 views

What “double moves” are sometimes considered legal?

As we know, castling is a legal "double move," where two pieces are moved at once. But in my country, Indonesia, in my childhood, the opening below was an 'assumed legal' double move to counter 1.e4 ...
14
votes
3answers
5k 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 ...
5
votes
1answer
139 views

Why isn't the active color allowed to be in check in a FEN legal position?

The title says it. Reading up on how to describe the position of a board, all of the requirements make sense (like two kings not being on adjacent squares and so on) except for the active color being ...
12
votes
5answers
2k views

How to know when a FEN position is legal?

I am doing a personal project, where at one point I need to validate the FEN position, I started with some basics checks, such as check if there are kings and making sure there aren't any extra rows ...
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votes
2answers
5k 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 ...