58

Yes, it can This particular knight's tour is closed, meaning that it starts and finishes in the same square. Therefore, the knight can start at any square on the board and finish on the same square, since it just starts at a different point along the cycle.


48

Analyzing your own games is the best and fastest way to improve in my opinion. As soon as possible after the game, write down the variations that you were thinking about during the game, especially the ones that were not played. This will be useful when you come back to the game after days, months, or even years. As you improve, it will be helpful to ...


46

You have little chance in your dissertation of surpassing state of the art chess engines. Perhaps you could find a hook which hasn't been explored so much. One idea is to train your program to play amateur chess in a convincing way. Can a program pass a sort of chess Turing Test where a human-player couldn't tell if they were playing an AI or playing a ...


37

This calls for some scripting, so here's my first hasty attempt at it ;) Here's a quick way you can do the search on your own in python, using stockfish 10 and only the python-chess package. All open-source and free-software! Briefly, what the script will do: Consider all 960 positions, one at a time For each position, it scans over all legal white moves ...


34

This is actually a very complex question, and not one which has been solved in a satisfying way, to my knowledge. Essentially, we're asking for an algorithm to perform a kind of reverse Turing-test, to differentiate between human players and computers. First, client-side checks will always have weaknesses, unless you are in complete control of the client ...


33

"Tactics is knowing what to do when there is something to do. Strategy is knowing what to do when there is nothing to do." -- Savielly Tartakower What follow are the most salient features of the position that jump out at me, and these are the sorts of things one needs to look for when there seems to be nothing to do: You have no structural weaknesses ...


33

Why do chess engines fail to spot good moves in some positions? The reason are called forward pruning techniques (see http://chessprogramming.wikispaces.com/Pruning) with ProbCut in first line. The move 15...Bf2 is pruned on shallow deeps because it includes the sacrifice 16.Rxf1 without regaining something concrete with evidence immediately after. The ...


27

Carlsen crushed it, made almost no mistakes whatsoever in rapid. It is as if he was playing at classical time controls. Chess is about not making mistakes. If your opponent doesn't make mistakes then you're only going to get a draw even if you play like an engine. He did play good moves as well. Example on move 37 the position is a draw but he gave himself ...


26

If the computer was capable of evaluating every line of play right to the end of the game, the evaluation would never change. Indeed, the evaluation of every move would be either "win", "lose" or "draw". This is essentially what happens in endgame tablebases.* If computers could do this for every position, every game against a computer would consist of the ...


25

There is no hurry. After 8. Bb2 the bishop on b6 is not going anywhere. NxB continues to be available to white until black does something about it like a6. That means that delaying NxB gains a tempo if black has to make a less useful move to try and "save" the bishop like a6. Since recapturing with the a pawn probably gives black a better game it is worth ...


25

It is a fairly short and simple explanation: They can combine to attack any square, not just squares on one color. As part of that they can also shift the attack better from one square to another.


24

According to the Lomonosov tablebases, it's mate in 40 for black. While the queen can't force mate by herself, she can force a zugzwang. In this case, when the bishop is forced to move to e8. Then, it's a matter of giving checks until the queen forks the king and bishop. One of the longest variations given is as follows: [FEN "7k/5BpP/3K2P1/8/8/8/8/4q3 w -...


23

Computers allowed the creation of endgame tables, which allow the user to know with 100% certainty if a position can be won, and how to do it. Currently all positions containing 7 or fewer pieces are 100% known. I am unaware of any opening line busted by computers. Not that I know of, but computers do find answers to some hard questions. So while computers ...


23

Here's a simpler way to see why it's winning for black: You're right that the queen cannot checkmate the king by itself, but it can stalemate the king [*] (an example pointed out by Ionut Deaconu) and that's all we need here as that would force the bishop to move. Once the bishop moves it's clear that material loss is unavoidable as either the bishop [**] or ...


21

In blitz, you can tell by how much time they're using. People using engines use a consistent amount of time for every move, instead of blitzing through the opening and slowing down to a crawl in the middlegame like most normal players. In particular, they can't play the opening fast, because they have to update their computer board after every opening move....


21

Because that was the move that the computer saw lost the least material. The BEST you can do there is just get two minor pieces for the queen. It gets worse after Qa4. Even just Nxc7 wins so much material that it is easy, but there is even better. [FEN ""] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Bc4 Nf6 5. d3 Bg4 6. f3 Bf5 7. Bd2 e6 8. Nge2 Nc6 9. Nd5 Qa4 10....


20

The answer from SmallChess is good. There's also an illustrative tweet from Garry Kasparov on the subject: For beginning chess players, studying a Carlsen game is like wanting to be an electrical engineer & beginning with studying an iPhone.


20

In the diagrammed position you have a material advantage but Black's position is a little bit better because his rooks are connected and he has a safer king position. His immediate threat is RxR, when you have to retake with the king followed by Qg1+ and after you move Kd2 he will play Bb6 and the pressure around your king will become intense. You are paying ...


19

No, there are positions in which a lot of moves have the same effect or are the same but you can play them in a different order.


19

What's the purpose of this question & answer? I see a lot of misuse of engines in this community. I see topics where people do opening "analysis" by copy pasting engine outputs. Even worse, I saw opening "analysis" by copy pasting in first move! Lots of beginner in this community believe that engines give best possible move in every position, because ...


19

Black's queen is the only defender for the mate on f7 (the knight on e5 is pinned). This makes Bxg5 a very attractive move, as the black queen has nowhere to go (the only safe spot, Qf8, is met with Qxd8 and mate). [FEN "3rk2r/p1Q5/3p1qn1/4npp1/7p/1B6/PP1B1PPP/R3R1K1 w - - 0 1"] 1. Bxg5! Black can chase the white queen for a couple of moves but his ...


19

One of the problems with chess-analysis software for weaker players is that it just shows the strongest move per the computer, without any explanation why. There are some programs, like the ChessBase programs that, using their "Tactical Analysis" feature, attempt to give some explanation to the moves, but they are all wanting. That said, decodechess.com ...


18

I'd have to disagree with @andrew about analyzing ones' own games. The reason is, I'm a B-player. I make B-player moves. I perform B-player analysis. That's insufficient. Spending precious time to produce weak analysis is inefficient. This may offend people. But consider - if you had to make a home repair and you didn't know how, would you just figure it ...


18

This is a very famous position. Well, here are some reasons, and there are quite a few: Since this was a Candidate’s Match to qualify to play Spassky, it comes down to exact calculation above all. Fischer calculated that it was good, and his judgement bore out since the game only lasted another 12 moves. Here are some things that probably contributed to ...


17

I think that this is a good question, but also that the most enlightening way to answer might be to point out what I think is a slight misconception behind it. You say that most analysis you have seen focuses on the development of pieces, rather than the development of unoccupied spaces. But when one focuses on the development of pieces, what does this mean? ...


17

lichess.org has played game analysis and allows you to edit a board before AI game. Its analysis shows wrong and right moves and percentage statistics of mistakes for both sides.


17

Who better to answer this question than the legendary former World Champion and master of opening preparation Garry Kasparov himself? I quote In June 2005 in New York I gave a special training session to a group of the leading young players in the United States. I had asked them each to bring two of their games for us to review, one win and one loss....


17

In this position, the material imbalance pretty much tells the whole story, as a queen and two pawns against two knights is, barring significant positional compensation, an overwhelming material advantage. And in this case, the non-material positional considerations only serve to emphasize Black's advantage: the white king is exposed, and his pieces are not ...


17

Two conditions must apply for a position to be checkmate: The player to move has no legal moves. His king is in check. The first is true here, but the second isn't, so it's not checkmate. When a player to move has no legal moves but isn't in check, it's called stalemate, and it's an immediate draw.


17

White intends to play c5, which will gain space on the queenside and severely cramp black's position (The b6 knight has no good square). On the other hand, e5 weakens white's control over d5 and f5 (e.g. Black can then go ...Ne7-f5). Black could also take advantage of the weak c4 and d5 squares with ...Na5 and ...Bc6. Keeping the pawn on e4 seems better. ...


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