Questions tagged [analysis]

Questions related to determining the Truth behind positions. This includes who is winning, what the next move should be, and what happens when a certain move is played.

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3
votes
3answers
95 views

Why is white's best play Nxd5 here?

I'm new to chess. In the position below, lichess analysis says that Nxd5 is the best move for white. But can't black just capture the knight afterwards with his pawn and threaten white's pawn and rook ...
4
votes
1answer
111 views

The move g5 in this position

I would like to know what is the reason why g5 is a necessary move for Black. I now see that what I played Bd7 is horrible as it hangs a pawn on d6 after Qb4. I cannot see why I should weaken the f5 ...
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0answers
14 views

How do I insert a PGN? [migrated]

I'm new to stack exchange, and I was wondering: how do I insert a PGN? I want to use them to show different openings, review moves, etc.
3
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1answer
106 views

Anderssen's 'immortal game'

I came across Anderssen's 'immortal game': [FEN ""] 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 b5 5. Bxb5 Nf6 6. Nf3 Qh6 7. d3 Nh5 8. Nh4 Qg5 9. Nf5 c6 10. g4 Nf6 11. Rg1 cxb5 12. h4 Qg6 13. h5 Qg5 14. ...
4
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4answers
111 views

What is the most amazing chess position you have seen? [closed]

What is the most amazing chess position you have seen? I have been wanting to ask this question for a while, but feared it would be closed. Since the "Uniquely Satisfying Puzzle" and "What is the ...
5
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2answers
211 views

Playing d5 in the Pirc defense

Two days ago, I played, a game as Black and after the analysis I was quite surprised to see that the computer suggested, in several moves throughtout the game, the move d5. In this position I think ...
9
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2answers
295 views

Weakening g4 move

I would like to know the reason behind the very weakening move g4 recommended by Stockfish in this position:
17
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8answers
8k views

Chess PhD topic in machine learning?

I searched this online and couldn't find sufficient answers. Is there a topic in chess that includes machine learning and would be sufficient for a PhD thesis? I was thinking of utilizing a CNN that ...
2
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2answers
65 views

Idea behind sacrifice pawn

I would like to know what compensation White gets after the pawn sacrifice 6. b4. To me, giving back the pawn just for a tempo, i.e. Bb5, does not seem to be enough.
5
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2answers
154 views

Carlsen vs. Nepo this morning, why didn't Nepo win the pawn?

On move 19 Carlsen played Nd5. Why didn't Nepo win the pawn with Nxd5? If Bx, then Qxb4, or if px, then Qxb4 attacks the Bc4 still and Bxa6 then Nc5 and move the rook. [FEN ""] [Event "Tata Steel ...
7
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1answer
676 views

How to “crack” this position?

I find this particular final position from a personal game intriguing. Even though there's a material advantage, there's no clear path to the victory. Does anyone have any good ideas on how to crack ...
2
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1answer
143 views

When should you trade to prevent castling?

The main question I have is about a game I played. What do I need to know about how to take a piece so that my opponent's king can no longer castle? In the following game, I played Bxd2+ to do so. ...
14
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4answers
3k views

How to tell that this is a draw

In an endgame I played as Black, after the rooks were exchanged, the below position was reached. A funky stalemate quickly ensued. [FEN "8/5ppk/5p1p/8/3K1P2/6P1/7P/8 b - - 0 1"] [startflipped ""] 1.....
6
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2answers
100 views

In Damanovic-Fischer, 1970, wasn't 66. Ke3 better?

In Damanovic-Fischer, it seems like the move played, 66. bxa4+, made it easy for Fischer. Wasn't 66. Ke3 better? [Title "Damanovic- Fischer, 1970,"] [FEN ""] [startply "130"] ...
3
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1answer
102 views

Can I win as black here?

In the below position, I'm playing as Black and it's my turn. [FEN "8/8/1K6/2P5/1P6/8/8/6kq b - - 0 1"] I've recently gotten back into chess, and this one is driving me crazy. I can't seem to ...
0
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2answers
150 views

Why doesn’t the computer like my odd queen trade?

I played a game as Black some months ago on chess.com in which I made a rather amusing, in my opinion at the least, queen trade. I won the game in the end, but only after being a bastard and promoting ...
2
votes
2answers
132 views

Elephant gambit game analysis

I would like to get some explanations on the mistakes and blunders of my game posted below. My Lichess rating is around 1770, so I do not know if the mistakes of the game are hard to spot for my level ...
4
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4answers
114 views

Chess software that enables you to set up a position from scratch?

I'm looking for chess software (free or otherwise) that will allow me to completely clear the board and set it up as I wish in order to analyze a specific situation. All of the chess puzzle software I'...
2
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1answer
51 views

Analysis on Alekhine-Lasker 1934, after 18.Qd6

In this position from Alekhine-Lasker, Zurich 1934 [fen "r4rk1/pp3ppp/1qpQ1n2/4nN2/8/1B2P3/PP3PPP/2R2RK1 b - - 0 1"] 1... Rae8 2. Ne7+ (2. Rc5 Nfd7) Kh8 3. Qxe5 Ng8 It's Black to play. So if 18......
4
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1answer
110 views

Sicilian Dragon

[fen ""] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Rc8 11. Bb3 Ne5 12. h4 Qa5 13. h5 Nxh5 14. g4 Nf6 15. Bh6 Bxh6 16. Qxh6 Rxc3 17. bxc3 ...
12
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1answer
3k views

In Fischer-Petrosian 1971 game 7, why did Fischer give up his good knight for a bad bishop?

Fischer played 22. Nxd7, which seems strange since the knight looked very good. Why did he play it? [Title "Fischer-Petrosian, Buenos Aires (7) 1971, 10/19/1971"] [FEN ""] [startply "42"] 1. e4 ...
2
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1answer
129 views

Why is h4 a good move here?

[FEN ""] 1. d4 Nf6 2. Bf4 c5 3. e3 Qb6 4. Nc3 cxd4 5. exd4 Qxb2 6. Nb5 Na6 7. a3 Nd5 8. Bc4 { I'm aware this was a blunder because of Nc3, but fortunately they didn't see it} 8... ...
4
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3answers
107 views

Usefullness of analysing ones own games with an engine

There are different opinions on analysing your games with an engine. Some say you shouldn't use an engine at all, and others say you can use it, but you should do your own analysis first. Most say ...
4
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2answers
121 views

Explaining middle game computer analysis

I was looking at the computer analysis for a game I played and I need some help to understand a line found by the computer. After a balanced game (started with a Torre Attack) we arrived at the ...
2
votes
3answers
162 views

Trying to figure out why the engine suggested this move

I don't quite understand this. I like playing chess, and I'm working to improve, but I still am likely very much a novice. Anyway, I played a game where I won in 9 moves, but I'm curious why the ...
3
votes
1answer
110 views

Mistakes in my game

I would like to receive some feedback on my mistakes of the below Lichess game, if possible from someone above 2000. I an unsure about the reason of the mistakes I did in the game. When I finished ...
3
votes
4answers
149 views

Central control disliked by engine in 1.e4 e6 2.d4 a6 3.c4

Recently I played a chess game that started with the moves: 1. e4 e6 2. d4 a6 and then I played 3. c4 which according to Stockfish is inaccurate. What is the reason for that? How is this situation ...
6
votes
2answers
966 views

Why is this a missed win?

I found myself in this position as Black. I played Kb6, but the engine on chess.com suggested that the move Kb7 is a missed win, and the continuation below would have been winning for me. It gave no ...
4
votes
3answers
145 views

Potential exchange sacrifice in a King's Indian Defence middlegame

[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. b4 Nf6 ...
2
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2answers
413 views

Average centipawn loss

I had no incurracies,blunders or mistakes then also my centipawn loss was 48. What is the problem here or I have misunderstood average centipawn loss. You can have a look at that game at lichess. ...
1
vote
1answer
177 views

What move did I miss?

I played b4. According to computer, it is a "missed win" move by me. But what move did I miss? What move should I have played? (I am white. And played b4 but I got "missed win")
4
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2answers
565 views

Why is 6. Nge2 better, and 7. d5 a necessary push in this game?

I have two questions about a recent game that I played on Lichess. Question 1: Why is it necessary for White to push d5 now in the game, in this position, and why is Be3 a blunder? I did play d5 ...
2
votes
1answer
165 views

Why can Stockfish give different evaluations at the same depth?

When I let Stockfish get to a certain depth (say depth 33), it gives some evaluation. Then I refresh the position (while leaving Stockfish on) and when it gets to the same depth it gives a different ...
7
votes
2answers
209 views

First known computer-found error in expert chess analysis

What is the first known example of published expert chess analysis that was disproven by a computer search, with the winning player completely opposite? That is to say, a widely known published ...
4
votes
1answer
121 views

The move Bg4 in the Pirc defense

I am having trouble understanding a move studied in an opening book. The move is Bg4 in the Pirc defence in this position. What is the point of aiming to exchange the bishop on f3? The point d4 does ...
12
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8answers
4k views

Chess software to analyze games

My son is into chess and plays chess tournaments. I would like to know what good chess software is available to analyze his games. The software should analyze move-by-move and should point out weak/...
1
vote
2answers
144 views

Weakening the kingside with g5

I am having trouble deciding whether a move such like g5 (g4 in case it is White) is worth it or not. I am looking for advice on my particular position and if possible, a general explanation for any ...
3
votes
1answer
141 views

Python-chess : Are the move scores enough to rank moves from the most to least likely moves played by an engine?

My goal is to make a script to finding the most and least likely move an engine will play, and then make a list it. I tried using the scores to make such a list, with the best score equalling the most ...
4
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1answer
113 views

Leaving the score aside, what are the criteria allowing Stockfish to choose its “best move”?

I'm trying to understand how a chess engine like Stockfish works. I use Stockfish 10 directly, without an UI. For example, for this position (white to move)... r3n1k1/1bpp2pp/pp2p3/2P1P3/R2P4/3B1rPq/...
19
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2answers
4k views

The Game of the Century - why didn't Byrne take the rook after he forked Fischer?

I'm guessing that there's a pretty simple explanation for this, but I can't seem to see it. [White "Donald Byrne"] [Black "Robert James Fischer"] [fen ""] 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5....
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0answers
40 views

SCID vs. PC: Multi-Engine Analysis

Is it possible to configure SCID to output the annotating engine in the variation itself? For example; Ne5 (Stockfish: -0.01 / +0.32 25. Bc4 ...) (Engine2: +0.20 / +0.48 25. 0-0 ...) (Engine3:...
2
votes
1answer
112 views

What are these chess.com figures from my English Opening game?

I am asking something that chess.com shows about the English Opening, based on a game that I recently played on chess.com Chess.com showed the following figures: 1.c4 e5 .. 2.g4 e4 9.6 5.8 -White:...
1
vote
1answer
83 views

How to stop Stockfish analysis?

I am using Chessbase 13. I would like Stockfish to stop analyzing until I make it start again. What happens now is that I make it stop, and as soon as I go on to the next move, it starts analyzing ...
4
votes
2answers
166 views

Strategy for next move in a crowded situation

White is in the presumably better position in the situation below. However, under such conditions (e.g. there are tight formations of many pieces on the board), I find it usually hard to 'breach' the ...
8
votes
2answers
2k views

What is the most suitable position for a bishop here?

Recently I played a game with White whose link is: https://lichess.org/pAoAUp4O/white#42 and reached this position: I am having a hard time finding why the moves I played next (22. Rxe8+? Rxe8 23. ...
2
votes
1answer
164 views

What is this opening/position called, and what is white’s best move?

[FEN "r1bqk2r/pppp1ppp/2n2n2/2b3B1/4P3/8/PPP2PPP/RN1QKBNR w KQkq - 0 1"] Do you know the name of this opening/position? Additionally, please tell me what white’s best move is in this position. I ask ...
1
vote
3answers
178 views

Is this KBPP vs. KR position a draw or a win with perfect play?

I played a game on Lichess today as white, and me and my opponent reached this interesting endgame position. Note: It is black’s turn currently. The board is shown from White's point of view. [Title ...
6
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2answers
216 views

How to evaluate and comment moves in PGN format?

I want, with Python-chess, to evaluate any movement of some game and generate the PGN with analysis, as Chess.com does in its analysis. For example, i played one game with fools mate and they ...
3
votes
3answers
715 views

Why was castling bad for white in this game, and engine strongly prefered trading queens?

I'm a novice player, trying to improve. In the following game I played as white recently on chess.com, I analysed afterwards and my worst move of the game was apparently when I castled. The engine ...
-1
votes
1answer
137 views

Why did the (Black) computer play 9. … Ke7 here?

Not having played chess in ~5 years, I started playing against the computer on my phone at ELO~800 (I've since reached ~900). I do not know what engine the app uses (Chess for iPhone by Mastersoft Ltd)...