Questions tagged [analysis]

Questions relating to the objective assessment of a position. The assessment may entail which side has the advantage, or what the best move might be.

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3
votes
1answer
249 views

Why this exchange

I’m reading a book saying that now black Knight at b4 is under attack so need move away. However Stockfish app suggests take the white c3 Knight first using f6 Bishop , then black will Rcxc3 take the ...
0
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2answers
187 views

A deceptively simple eight piece endgame

I am in the dark about the following endgame, with white to move. May someone with FinalGen (or a powerful engine) give me a response? Is it a White win or a draw? [FEN "8/1k6/5R2/P7/1KP4p/5P2/8/...
8
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3answers
493 views

Are there consumer-level game play analysis systems that overlay the analysis on the board real-time?

An example of what I mean would be Thinking Table, though the Thinking Table is not a consumer product: Thinking Table is a series of works that explore the invisible, elusive nature of thought. ...
0
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0answers
82 views

Did Geller resign in a drawn position vs Spassky in a 1959 game

Did Geller resign in a drawn position vs Spassky in 1959 ? Or could White win ? The famous controversial position is the following : [FEN "6k1/6p1/7p/7P/2q1B1P1/Kp3P2/1B6/2N5 b - - 0 1"] ...
7
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2answers
475 views

Why don't engines show explicitly that a certain move takes to a threefold repetition (instead of just showing 0.00)?

I get that from the point of view of the engine there's no difference; equal is equal. But for a human analyzing with an engine, I find quite important to note that a move takes to a balanced position ...
4
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2answers
344 views

Engine's 2nd best move

Especially for checking studies (maybe also for teaching), it would be helpful to have an engine finding the second best move and assess it (or even give refutations of all alternatives). For a ...
4
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1answer
186 views

Queen versus rook endgame: to check or not to check?

Most tutorials the K+Q versus K+R endgame claim that at some stage, the key is to force the rook away from the king, then it is supposed to be easy: give a series of checks and fork/skewer the rook. ...
13
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4answers
3k views

Endgame - pawnless Queen + Rook vs Queen

Today, when I was playing end game I had a queen, a rook and a king (no pawns). My opponent had just a queen. It was his turn (the board was pretty blank) and he started giving continuous checks. I ...
7
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3answers
3k views

Why is this king and two passed pawns vs. king and rook endgame not drawable?

I aways thought that the king and passed pawn vs. king and rook endgame was always drawn. But I had two passed pawns in the below game,with Black to move, I was unable to draw the game. Why is that? ...
11
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2answers
4k views

Can I win this Rook and Pawn vs Bishop endgame?

I'm playing white and I've been unable to get the black king out of the corner. Does black have a guaranteed stalemate or is there some way to force him out the corner? [fen "5K1k/6R1/7P/8/8/8/2b5/8 ...
7
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2answers
2k views

How does white stop the three pawns and win this?

I arrived to this position, black, me, to play, in a tournament game, with plenty of time to think on both sides. Stockfish gives initially +55 and finally mate in 27 for white. Fortunately for me, my ...
1
vote
1answer
167 views

Bishop and queen endgame from a computer chess game

[FEN "8/6pk/p4b1p/2B5/P3q2P/6P1/5P2/3Q2K1 w - - 0 1"] 1. Ba7 (1. h5) This position happened in TCEC Season 15 Superfinal Stockfish vs Leela. In the game Stockfish played Ba7 and the game ...
1
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1answer
55 views

Erenburg vs Nakamura 2004

Did Erenburg operated a winning exchange sacrifice vs Nakamura in the Reykjavik 2004 game , Sicilian Najdorf opening ? Or could Nakamura have defended the position ? I analyzed the following position ...
6
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1answer
95 views

In French Defense Advance Variation, why does white play an early f4?

Game. First five moves: [FEN ""] 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. f4 Why did white play f4? My guesses: To defend e5 in the case d4 falls. Pawn pointing theory seems to indicate ...
13
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10answers
10k views

Can luck be used as a strategy in chess?

Consider below games where white looses a clean rook quite early in the opening but fights on hoping that they will be lucky and escape. Lucky enough, they escape and win the clearly lost game. [Event ...
-3
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0answers
72 views

Why is Ng4 bad but Nh5 good in Grob Opening?

I was playing a game that I eventually won but while analyzing, I found that this move is considered weak. Is there something obvious that I'm missing? Positions on board: I did Ng4 after this as I ...
8
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2answers
3k views

Is there an online chess evaluation engine with a REST API?

Is there an online chess evaluation engine with a REST API? I'd like to be able to send a game or position (with castling ability presumably) to a simple REST API and get back the positional ...
3
votes
1answer
52 views

Where can Botvinnik's analysis of Botvinnik - Gligoric, Tel Aviv 1964 be found?

I have seen an old post in a chess forum referring to Botvinnik's own analysis of the game presented below. I have searched, but did not find it. Where can the analysis be found? If you can provide a ...
7
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1answer
211 views

Why is the immediate ...d5 in the 4. d3 Italian not played?

The line may seem suspicious at first, but after a few precise moves (some may say artificial moves) by Black an interesting middlegame position is reached. I did some analysis on my own and probably ...
3
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1answer
276 views

How is c4 the best move in this position?

[FEN "rn2r1k1/pp2qpp1/3b1nbp/2pp4/6PP/1B1PBP2/PPPQNK2/RN2R3 b KQkq - 0 14"] 14... c4 15. dxc4 Nxg4+ I set up the above position in Stockfish and the initial analysis was that c4 was the ...
13
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2answers
4k views

Why does Stockfish suggest h4 here?

Analyzing my latest game on chess.com, Stockfish says that h4 is the best move here: I followed the line, but I failed to understand the reasoning of this move. Is it for some long-term advantage? ...
8
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2answers
3k views

Why is g3 a bad move here?

Why is the last move by white, g3 on the board below, considered a bad move? It was in a game that I played recently and my idea was to protect the bishop in f4 and give the other bishop more space to ...
16
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6answers
3k views

Why does the engine dislike white in this position despite the material advantage of a pawn and other positional factors?

After a trade that sacrified a bishop and a knight for two pawns and a rook, the game reached the following position: (White to move.) [FEN "2r2qk1/1b1n1pb1/p4n1p/1p4p1/4P3/1BN2P2/PPP3PP/R2Q1RK1 ...
5
votes
4answers
268 views

Why does Stockfish give an evaluation of +7.42 here?

[fen "r3k1nr/pppqn2p/5p2/b5p1/3PP3/1BP2QBP/PP1N2P1/R3K2R w KQkq - 3 14"] This game was played by me on chess.com recently. (I am white). The material balance is +1 (for white). Then why is ...
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1answer
63 views

Jobava vs Milton 2005 Skandemborg game

In the following position, from the above game, the book ROOK vs Minor pieces endgame give AN almost easy win for White. Yet I tried on my Houdini 6.02 and got a draw instead. The position is WHITE ...
21
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2answers
3k views

Why is ..Kh8 so much worse than ..Kg7 after Nf6?

I just "failed" this Lichess exercise. Main line is Stockfish's, secondary is mine's. [FEN "r5k1/3N1p1p/2p1p1pb/3pP3/p2P3q/5P2/PP2QP1P/R4RK1 b - - 2 19"] 1...Bf4 2. Nf6 Kg7 {-5.4 ...
2
votes
1answer
103 views

Rook vs Bishop endgame

In the following endgame position, from Dautov vs Heinemann, from the book FUNDAMENTAL CHESS ENDING, what happens with perfect play? [FEN "R7/5pkp/4b1p1/3p4/8/5P2/5KPP/8 b - - 0 1"] The ...
2
votes
1answer
140 views

A suggestive opposite color Bishop ending

The following position appeared to drive even modern engines crazy! [FEN "8/8/b1kP2p1/P5P1/8/BK6/8/8 b - - 0 1"] BLACK to move will get the following results: Komodo 24.1 64-bit depth 61= 3....
8
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1answer
168 views

Reanalyzing old chess books

Computers were demolishing analyses way before they became God (see e.g. here), but latest at ELO 3000 or so it became humiliating. Do you know instances of chess books explicitly rewritten years ...
52
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8answers
32k views

How would you determine that the player is cheating in online chess?

There are a lot of online websites, where players can play chess in real time with each other. Most of the games are 5-10 minutes long. With the availability of chess software one can take an ...
-1
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1answer
144 views

A rook endgame from a classical book

From the game Kozul-Kurajica, Sarajevo 1998: [FEN "2r3k1/5pp1/1p5p/3p4/8/P5P1/1P3PKP/4R3 w - - 0 0"] In the above position; Stockfish 12 at a depth of 42 evaluates the position the position ...
0
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1answer
96 views

Position Analysis - Win or Draw - Efimeko v Rublevsky 2009

Is the current position winning or equal , and with the perfect play what would be the resulting position. [Event "Karpov Poikovsky"] [Site "Poikovsky RUS"] [Date "2009"] ...
0
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0answers
120 views

Is the following position a win for White or a draw?

The deceptively simple 11 piece position is hard to decifrate. In a Sicilian Defense, Paulsen variation, the following position appeared on the board: Grandellius vs Andreikin, Black to move. What ...
-2
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1answer
67 views

King's Indian Attack position analysis

So, after some 20 moves, we have reached this position. Who is better ? What should be the ideal plan/threat for both white and black ?
23
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2answers
9k views

Why does chess.com consider this promotion a blunder?

I've just played a game on Chess.com, and I'm surprised that the engine considers a promotion that I made a huge blunder. Like, my position was rated -62.8 (basically a won game), and after I promoted ...
2
votes
1answer
121 views

Is it possible to measure play strength by analysing games of a player?

I am thinking on a way, most ideally on a software tool, what could get one of more games of a player, analise them, and gives an estimate on his play strength (as Elo/Glicko rating). Is it possible? ...
6
votes
4answers
236 views

Why exchange the knight for the bad light-squared bishop?

Here is a recent game in the King's Indian I had as Black: [Event "Rated Rapid game"] [Site "https://lichess.org/za0zcaTi"] [Date "2021.08.23"] [White "tomx2"] [...
5
votes
1answer
295 views

Why is the King's Indian often used to play for a win against 1. d4 when it allows an early queen trade?

Lichess's opening explorer database shows a 49% win rate for White wins compared to Black's 41% in the King's Indian, Exchange Variation. Meanwhile, the Master's database shows a whopping 64% draw ...
1
vote
1answer
109 views

How do I convert a move from coordinate notation to algebraic notation?

The following Python code gives the best move in coordinate notation: import chess import chess.engine sfEngineTxt = "E:\Chess\Stockfish\stockfish_14_x64_modern" sfEngine = chess.engine....
5
votes
3answers
186 views

Tiniest readable board and pieces design

Has anyone developed a graphic design format for representing boards within a very tiny amount of space? I'm thinking along the lines of how sparklines were developed to allow a line chart to be ...
2
votes
1answer
135 views

How do I get Stockfish to write its analysis to a file using a batch file on Windows?

I can get this to work in a Windows Command Prompt window as follows: stockfish_14_x64_modern.exe uci ucinewgame position fen rnb1kbnr/ppp1pppp/8/3q4/8/8/PPPP1PPP/RNBQKBNR w KQkq - 0 1 go depth 17 ...
4
votes
1answer
112 views

Karkops,M vs Dautov R. Is this a win really?

Karsten Müller analyses this position as win for black. 8/R4p2/6p1/4k2p/p6P/r5P1/5PK1/8 b - - 0 44 He thinks 44.. Kd5! is the only move to win. I tried to follow his suggestions whilst playing ...
4
votes
1answer
151 views

Why don't masters play 7...e5 against the Fianchetto Variation of the King's Indian?

In the Lichess database, this is the most popular way to play against the Fianchetto Variation of the KID: [FEN ""] 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nc6 7.O-O e5 But at ...
1
vote
1answer
45 views

Python-chess : How to make infinite analysis in multiPV mode?

I need to run infinite analysis in multiPV mode. How to do it right? My code doesn't work. original_fen = "7k/1b1r1pp1/3Bp1np/1p2P1q1/8/1PQB2P1/2R2P1P/6K1 b - - 3 23" original_board = chess....
3
votes
1answer
99 views

Pattern Recognition - Chess Tactics

I have a collection of ten thousand games of a player. Is there a way to look which kind of tactics does the player miss on most often? Which tactics does he need to focus on?
4
votes
1answer
210 views

In the shown position, should I push pawns or trade material?

In the following (now finished) game, I was unsure at this point how to proceed. One thought was to take the pawn at d4 with the rook, in order to entice a rook/rook trade since I'm up on material. ...
3
votes
1answer
274 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. ...
10
votes
2answers
2k views

Three way fork-Why take the rook instead of the queen?

I just finished off a game and decided to do some analysis because I had a position that I was thinking about for a little bit. I ran the game through Stockfish and the move I was thinking about was ...
41
votes
13answers
27k views

Is there any free software to automatically analyze and annotate games?

I'm looking for free software that automatically analyzes and annotates chess games (post-mortem), preferably marking blunders, suggesting good alternatives, pointing out missed tactics (forks, pins, ...
4
votes
1answer
284 views

I can't understand this puzzle

I came across this puzzle and even after I learned the answer I couldn't quite understand what's going on. I understand that we amaterial advantage by capturing the knight with a pawn, but I can't ...

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