Hot answers tagged

45

What your friend is saying isn't "fake news", it's outright bull****. Of course computers can recognize 3-fold draws, in fact just about the first step of writing a new engine is to tell the engine what the rules of the game are. Here're the relevant lines in Stockfish's code: bool Position::is_draw(int ply) const { if (st->rule50 > 99 && (...


29

No, this in incorrect. A pawn may capture and promote on the same move, there's no rule prohibiting this (§3.7 of the official rules regulate pawn moves, including captures and promotions). With two rooks next to each other, the pawn might be 'pinned' because your king is on the same column and there are no other pieces or pawns in between; then, a capture ...


21

There's a correct list of World Champions (preceded by a list of players regarded as the world's strongest before the title existed) on Wikipedia. All of them are men, there hasn't been any woman considered to be the strongest chess player at a certain point of time. As for regional championships, Judit Polgar, mentioned by @BenjaminCosman, won the Hungarian ...


19

Point 1 is the crucial one. Unless the coders have omitted the repetition rule altogether, then the bot will calculate its third repetition as leading to a draw. It may still choose it, but only when it calculates that no other alternative is any better - that is, that a draw is the best it can play for assuming you don't blunder. In this situation, either a ...


18

Yes there is a female world chess champion. Currently that person is Ju Wenjun, who won the most recent Women's World Chess Championship against Aleksandra Goryachkina. If you're asking whether there has been a female open-category world chess champion, the answer is "no", in fact no woman has ever beaten a reigning undisputed world chess champion ...


16

It's possible that your friend has hit upon a sequence that works against a particular engine running at a particular difficulty. But this will almost certainly not generalize. Engines can have something called a "contempt factor" which causes them to try to avoid draws if they evaluate the position as slightly negative. Whether this is present, and how ...


14

There has not yet been a female world champion in chess. According to Wikipedia, Judit Polgár is "generally considered the strongest female chess player of all time"; see the article for her many accomplishments.


11

The move a Knight makes is typically called either a "Knight's move", or "L-Shaped". There aren't really any more common names than those, as the Knight and it's move are both relatively unique, and predate western chess; being one of two pieces that were directly imported from Chaturanga (the other is the Rook) in their current form. You will occasionally ...


6

Well, first of all, going "back" is often not an option. Pretty much every opening involves pawn moves, and you can't take those back. You also can't undo captures. So clearly you'll have to do some work just to get into a situation where the computer can take its move back, let alone will. The computer generally has a attributes that it's working towards, ...


6

Even if there was no rule that entering the same position was a draw, a decent chess engine would add it as a rule. You cannot win if you keep repeating positions. For a checkmate, you must stop repeating positions at some point. So if you enter the same position a second time, limited depth evaluation of the position might tell you that the best move will ...


5

White square to the corner right, Queen on her colour, rooks in the corners, bishops beside the royalty. You can remember this by recalling that bishops are equivalent to barons in the peerage, so "next to royalty" in importance, and superior to mere knights. As the game migrated through Persia (or Iran if you prefer) the pieces now known as bishops were ...


4

Assuming white is moving up the board in the position as shown, 1.Rxg8+ Kh7 2.Rxg7# BTW, the usual notation for Knight is N, not H. You can also use online tools to make better pictures (and to produce more easily-shareable notation for the board). For example https://www.365chess.com/analysis_board.php For instance, your puzzle in FEN is RR4bk/...


2

We call it "dhai chaal" (in hindi) or 2.5 steps (in english) in India.


2

Tim Krabbé compiled a list of over 40 serious examples of promotion to rook and bishop, including some seen in the top answers.


2

I want to add from experience that against weaker engines there can be a sequence of moves that will lead to a certain outcome. I remember playing Ruy-Lopez as white against an old chess engine (7 years ago) with the engine always making the same move. After a certain point, I learnt a combination of moves which made the engine resign. The important point is ...


1

Well, there is a regional (and pretty famous) female chess player I have heard of. Her name is Koneru Humpy. Her Elo rating is 2606 according to Wikipedia.


1

Either I understand it wrong, or your puzzle is flawed...


1

As the other answers suggest, your acquaintance is entirely wrong and every functional chess engine (not to mention the strongest ones available) understands draws by threefold repetition. Moreover, according to this Wikipedia article, there was a match in 2015 when Komodo played several grandmasters with odds, i.e. starting down material, and did not lose ...


1

If you have a winning position but you are running out of time, then you'll want to be able to deliver checkmate without having to think for too long about each move. In these situations a rook can be safer than a queen because you are less likely to accidentally put your opponent in stalemate, even if you could have delivered mate with a queen had you more ...


1

Usually, when chess in analyzed, it's done with the benefits of a decision judged solely on the game state. That is, players are modeled as caring only about winning the game. But of course people are motivated by more than that. Deciding on whether to accept a draw depends on factors external to the actual game. There are many overlapping motivations for ...


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