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1

I just learned of an engine that analyzes chess positions to determine if checkmate by one side is impossible: https://elrubiongamma.ddns.net/chess-unwinnability-analyzer/about.html So you can solve this problem in practice by running the algorithm for both sides. It is called the Chess Unwinnability Analyzer 2. The source code is available here: https://...


12

In short, it means that either both positions must be "white to move" (white's turn) or both positions must be "black to move (black's turn). If the pieces are in the same places, but one position is white to move and one position is black to move, they're different positions.


4

The Wikipedia editors got that from article (.2 the FIDE Laws of Chress. This is what it says: 9.2.1 The game is drawn, upon a correct claim by a player having the move, when the same position for at least the third time (not necessarily by a repetition of moves): 9.2.1.1 is about to appear, if he first writes his move, which cannot be changed, on his ...


7

This was done by Charles Bloodgood, a chess enthusiast who spent most of his life in prison. In the 90s he regularly played games against other prisoners; since he was a fairly good chess player and they were completely new to the game, his rating rose considerably. By 1996 his USCF rating was 2789, the second highest in the country, despite playing almost ...


13

Yes, it is possible. And it has been done. At the highest level such practice would be frowned upon, to say the least, and would only be harmful for the grandmaster gaining valueless rating points with such ridicule practice. On a lower level, however, a few dozens of points can award you a Fide title, and such "farming" by playing in very low ...


9

Tournaments Not all games affect the rating. FIDE rating is about games in FIDE-sanctioned tournaments pre-registered by the federation in whose territory it is held. In addition, they (FIDE Qualification Commission) have the right to not rate a tournament for arbitrary reasons, and a "tournament" of 200 games between Carlsen and his 1200-rated ...


10

FIDE ratings are governed by the FIDE Qualification Commission. It is their job to oversee and scrutinise matters relating to titles and ratings. Normally for ratings these things work in an automated, computerised way which doesn't require much oversight. However if something looks wrong regarding either ratings or titles then someone can contact a member ...


17

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 the case that moving the piece was not legal, for instance because it left your king in check or placed your king in check. According to the current FIDE Laws ...


5

You didn't ask, but note "legal" in the answers: if you made an illegal move, and did not press the clock, you may and must change it, and usually (modulo §E11.5, "Do not distract your opponent in any way!") get scot-free. In German even the part on the board ("Zug ausgeführt") and on the clock ("Zug abgeschlossen") ...


5

No, you may not move that piece to another square even if you have not yet pressed your clock. From the FIDE Laws, art. 4.7.: When, as a legal move or part of a legal move, a piece has been released on a square, it cannot be moved to another square on this move. (Art. 4.7 continues with further laws regarding captures, castling and promotion.)


4

It is not allowed to change your move: https://www.fide.com/FIDE/handbook/LawsOfChess.pdf "When, as a legal move or part of a legal move, a piece has been released on a square, it cannot be moved to another square on this move."


4

This is a legal capture using the "en passant" rule. According to the FIDE Laws of Chess: 3.7.4.1 A pawn occupying a square on the same rank as and on an adjacent file to an opponent’s pawn which has just advanced two squares in one move from its original square may capture this opponent’s pawn as though the latter had been moved only one square.


8

The rules governing chess are the FIDE Laws of Chess. This point is explicitly covered in Article 3: The moves of the pieces 3.9.2 No piece can be moved that will either expose the king of the same colour to check or leave that king in check. The move f3 violates this rule because it exposes the king to check. As such it is an illegal move. Your program ...


21

The FIDE Rules Commission makes the rules and maintains them. There we can see who is making the rules. We see that, in general, they are arbiters and mostly not very strong players. Here is a list with their arbiter qualifications (FA = FIDE Arbiter, IA = International Arbiter), ratings (when they have them) and titles. Chairman - Abdulrahim, Mahdi IA 1349 (...


5

What is the criterion for a chess set to be used in FIDE tournaments? Actually there are several criteria for this. FIDE have published their relevant rules in Standards of Chess Equipment, venue for FIDE Tournaments, rate of play and tie-break regulations. The first requirement is that the tournament organizer and the chief arbiter approve. So, if you want ...


8

Let's start by debunking some of the false assumptions in your post. Draw offer in worse position The idea that this could be regarded as an "unreasonable draw offer" is nonsensical. Even when there is a material imbalance, which position is worse is often a subjective matter. Certainly at the level of expertise of the average arbiter you don't ...


1

Here is a set of rules that works fully: At any time exactly one board is obligated (initially the board for Team 1 White). If both players in the same team have the turn, then one of them must move. If one player in each team has the turn, then the player at the obligated board must move. Each player who moves at an obligated board may change which board ...


0

In Shad Yantra, which later became Chess. Rules were purely based on Categories. There are Royals: Raaja means King and Deputy of King called Mantri Immortal: Guru or Peace Ambassador. Spies: Chaarak. Army Commandar: General or Queen. 3 level of Officers. Pawns as common solidiers.. Pawns are non autononous and resource. They are also on 0 level, hence pawns ...


10

As I understand chess rules insufficient material means K vs. K, K vs. KB, or K vs. KN.(Correct me if I am wrong) Your understanding is wrong. the FIDE Laws of Chess have no "insufficient material" rule. What they do have is basically a "no helpmate" rule. Such a position is called a "dead position". That is to say that if ...


2

KB vs KB when both bishops are of the same color it is automatically declared draw by insufficient material. The same with KBB vs KBBB (theoretically possible), as long as all bishops move on OR white squares OR all of them on black squares. If just one bishop moves on a different color, someone can still win.


18

What should I do? You should ask the arbiter for permission. Elderly men often suffer from prostate problems which increase the frequency of need to go to the toilet. If this is you then talk to the arbiter before the event and explain the situation and get permission before the need arises. According to the FIDE Laws of Chess: 11.2.1 The ‘playing venue’ ...


1

It might be worth noting that so far as the FIDE laws are concerned the full touch move rule is the main rule that dictates that each player may move only his own pieces. In the FIDE rendering the full touch move rule is art. 4.3, stating: 4.3 Except as provided in Article 4.2, if the player having the move touches on the chessboard,with the intention of ...


3

Could FIDE make a rule allowing for a visual announcement of check and checkmate? Rule changes have to be approved by the rules commission. Rule changes are only made after extensive discussion and deliberation. Adding an unnecessary source of distraction like this is a bad idea so, while in theory they could, it is unlikely that such a suggestion would ...


5

I suppose they could make whatever rules they want, but it would seem to be unnecessary. According to the FIDE Laws of Chess: 5.1.1 The game is won by the player who has checkmated his opponent’s king. This immediately ends the game, provided that the move producing the checkmate position was in accordance with Article 3 and Articles 4.2 – 4.7. The game is ...


1

The king shouldn't rush into battles, but instead, he should go very slowly to beat his enemies. The queen (fers) should guard the king and stay in his side. [1] The bishop (fils) are the elephants the king used to bring. They were moved diagonally to wound the ranks of their enemies. Because no one dared to face them, the fils could leap over intermediate ...


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