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0answers
9 views

When to use Clear Hash

I am developing a program that analyzes games sequentially, i.e. one game after another. Below are the parameters. Engine: Stockfish 10 Threads: 2 Hash Table: 4000 Depth: 30 My question is about ...
4
votes
4answers
365 views

Why not 1.d4 Nf6 2.d5?

Why isn't 1.d4 Nf6 2.d5 a good move? It gains space in the center. As beginners we are told that after 1.d4, 1...d5 directly opposes White's ambitions in the center, stopping d4-d5 (similarly, in some ...
1
vote
1answer
40 views

What kind of checkmate pattern is this?

I played this game and was wondering, is this a checkmate pattern with a name?
4
votes
4answers
2k views

Is this really played by 2200+ players?

I came across the following game and was surprised to find that it was played between players with 2200+ ratings: How do players of level 2200+ lack the very basics of opening principles to play a ...
2
votes
1answer
38 views

How do I make arrows and colored squares using Chesstempo's viewer?

I am using Anki to study chess. I use Chesstempo's viewer. My question is: How can I make arrows and squares with color on the board?
17
votes
1answer
2k views

Did Bobby Fischer actually write “Bobby Fischer Teaches Chess”

Did Bobby Fischer actually write his bestseller primer “Bobby Fischer Teaches Chess” (1966, 978-0553130539), or was it written by a ghost writer? I often ask myself this question because it seems ...
9
votes
2answers
1k views

Why is 1.e4 c5 2.Nf3 b6 so unpopular?

Why is the Sicilian line with 1.e4 c5 2.Nf3 b6 almost never played at any level, nor considered in books and similar? It seems logical to me, and after the usual 3.d4 cxd4 4.Nxd4 Bb7, the Bishop is ...
3
votes
1answer
71 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
1answer
45 views

Should the Laws of Chess have an overseeing board independent from FIDE?

Why are the laws of chess still being overseen by the same political-governing body called FIDE and not by an independent autonomous body like in other major sporting codes such as football where IFAB ...
1
vote
2answers
58 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
869 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 ...
1
vote
0answers
59 views

Is there any game where AlphaZero wins against Stockfish thanks to a knight pair?

I have seen some of the games that were published in the match between AlphaZero and Stockfish. In many games, as when it beats Stockfish as black playing the Berlin Defense, AlphaZero appears to ...
0
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0answers
73 views

Carlsen blinks during Banter Blitz [on hold]

I was watching a YouTube video in which Magnus Carlsen plays on an online blitz game. Why does Carlsen blink a lot during the game?
3
votes
5answers
137 views

When can king and pawn win against another king and pawn?

Assume such a situation: Both players (Black and White) only have two pieces, that is a King and a Pawn. They have the liberty of placing them according to their wishes on the first row of their side ...
0
votes
1answer
70 views

What are the maximum number of pieces that can be checking a king at once [duplicate]

Was just thinking about this. It's easy to have two pieces checking the king via a discovered double check, but three is where it gets interesting. Finegold said in a video he was TDing for a game and ...
0
votes
2answers
133 views

List of famous, but incorrect, chess problems

Surely it has happened, that a famous chess problem turned out to be incorrect because some move was overlooked. Maybe a chess engine found out that a classic problem was bad! Is there a collection of ...
10
votes
5answers
3k views

Trade a bishop in the opening

In several openings white or black trades a bishop for a knight (Ruy Lopes exhange, Sicilian Rossomilo, Nimzo Indian etc). I have learned the bishop pair is worth a half pawn, and I have difficult to ...
2
votes
1answer
75 views

How Many moves can be expressed with algebraic chess notation?

I am wanting to write a chess engine (see here: Creating chess engine, machine learning vs. traditional engine?). The first step I am doing is taking a position in as an FEN and converting this ...
4
votes
2answers
96 views

Position-jugdment problems simulating actual play

I'm interested in collections of chess problems where we are not told beforehand what is happening in the positions presented, but we have to decide by ourselves, whether something clear exists (a ...
2
votes
2answers
114 views

How can I set up en passant in Popeye engine?

I want to solve a problem with Thomas Maeder's excellent Popeye engine, and to specify that a possible en passant in the diagram is ok. How can I do this please? The documentation seems opaque. Thanks ...
-3
votes
0answers
28 views

Stockfish 10 arm64-pgo getting teminated [closed]

Please tell me how to avoid termination of Stockfish-10-arm64-pgo, where as the other 2 are working on my phone. I have arm64-v8a instructions set and achitecture arm 64.
2
votes
2answers
141 views

Top players strongly in favor of 1.e4

Which are some top players known to be strongly in favor of 1.e4 in the opening? In this respect I find interesting a comment by Fischer on Alekhine: "there is nothing light or breezy in his style". ...
2
votes
3answers
53 views

Are USCF regular ratings more accurate than quick or blitz ratings in regards to quick or blitz games?

I recently went to a USCF tournament. Although it was quick/blitz rated, regular ratings were used for the purposes of pairings and prizes. This led me to wonder: are regular ratings actually better ...
4
votes
3answers
139 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 ...
3
votes
1answer
79 views

Does pawn's initial double square move have a special name?

Does pawn's initial double square move have a special name? Something like en passant?
31
votes
6answers
10k views

Do you say “good game” after a game in which your opponent played poorly?

Suppose you win a game in a noncompetitive way, when you know your opponent cannot feel good about his play. Maybe he dropped his queen early, to a simple tactic that should have been evident for a ...
3
votes
3answers
144 views

What is it about Soviet born players that makes them winners in the brutal 128-player knockout format of the World Cup?

Teimour Radjabov has just won the World Cup. The first two FIDE World Cups, in 2000 and 2002 had 4 groups of 6 players with the 2 group winners going into an 8-player knockout. They were both won by ...
3
votes
2answers
63 views

Online Correspondence Chess Competition

Please tell me of a free and easy to use website for organizing an online correspondence chess competition for kids. Thank you very much.
25
votes
3answers
3k views

Is there an engine that finds the best “practical” move?

A standard chess engine will find the move it considers best assuming best play from both sides. But this move might lead to an insignificant advantage or a tricky line that can easily result in ...
3
votes
2answers
92 views

How does an engine choose between two moves of equal evalulation?

In many positions, different moves are functionally the same, and an engine should return the same evaluation. For example, in a KR vs. KR endgame, (almost) every move that does not lose the rook ...
17
votes
3answers
12k views

Why is coffee provided during big chess events when it contains a banned substance?

Why is coffee provided for free during big chess events like the Olympiad despite the fact that it contains caffeine, which is a banned substance according to the World Anti Doping Agency (WADA)?
4
votes
3answers
88 views

Are there any online public chess databases I can upload my own games to?

Does there exist any online public chess database that I can upload my own games to (so that others can look at them)? I know that sites where you can play online will store games (that you played on ...
2
votes
1answer
137 views

How to tweak a chess engine like SF to return a variation which is only slightly better than your moves?

By default, engines return the strongest variation(s) they calculate. I was wondering if there is a way to tweak an open source chess engine to show a move from their MultiPV which is slightly better ...
14
votes
2answers
3k views

Do “chess engine in the cloud” services exist?

And if so, what interfaces can connect to them, and how do they do that? I want to analyze with Lc0, but I don't have a computer with a GPU; I could rent one for a short time period at various cloud ...
17
votes
4answers
5k views

Creating chess engine, machine learning vs. traditional engine?

I am both an avid chess player and computer programmer. I would say that playing chess and programming are the two things I spend the most time doing. Naturally, I am wanting to create my own engine ...
3
votes
0answers
51 views

Adding time to game played with chess engine

Are there any chess engines out there that will allow me to add arbitrary amounts of time to their clocks as the game progresses? I am interested in experimenting with two engines playing each other ...
6
votes
1answer
744 views

Does permanent loss of castling rights reset three fold repetition

Threefold repetition requires that the same "potential for moves". For example, if a En Passant could be played in one position but not another, it does not count as the same position. With respect ...
13
votes
1answer
3k views

How did the Fried Liver Attack get its name?

Many chess openings get their name from a player who invented it and/or played it and/or documented it. Place names are also frequently used, denoting where an opening was first played or became ...
2
votes
0answers
43 views

Chess 960: what is the optimal arrangement? [closed]

Chess 960 is a version of chess where the pieces are arranged behind the row of pawns. The same random arrangement (with the constraints of the king being between the rooks, and the bishops being on ...
1
vote
1answer
50 views

Opening the e-file in King's Indian Defense?

I'm reading about KID in "The Complete Book of Chess Strategy" by Jeremy Silman, and I don't understand one of his points. He gives the following moves (which is the "Averbackh Variation"): 1.d4 Nf6 ...
3
votes
0answers
55 views

Opening systems that enable strong tactics [duplicate]

First off I'm not looking for a gimmick / trap, but rather I'm looking for a new opening system for white / black that could enable more tactical options. For the last year or so I've been playing ...
2
votes
2answers
165 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
172 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")
6
votes
2answers
679 views

Caro-Kann c5-c4 push

I am having trouble understanding why the push c4 here is incorrect for Black. After 9. Qc2 b5 10. a4 a6 11. axb5 axb5 12. Rxa8 can be recaptured with the Queen and the pawn chain is stable. What is ...
1
vote
1answer
72 views

What is the most efficient way to calculate attack squares in a chess engine?

I have made a chess engine, and it seems from cProfile that my most expensive function is the one that calculates attack squares for both players. Here is the cProfile results for a perft function I ...
9
votes
1answer
8k views

How is this situation not a checkmate?

According to the chess app I am using, this is not a checkmate against black: [FEN "1rk4r/1p6/3p3q/Q1pPbRnP/p1P3B1/P6P/1P4R1/7K w - - 0 1"] 1. Rf7+ How is it not? I think the black king is ...
1
vote
1answer
103 views

Does White have any feasible way to break through this positon?

I recently played as Black in a 1+0 blitz game on Lichess in which the below postion was reached. [FEN ""] 1. e4 Nf6 2. Nc3 e6 3. d4 d5 4. e5g Nfd7 5. f4 Nb6 6. Nf3 Nc6 7. Bb5 Bd7 8. O-O g6 9. Bxc6 ...
3
votes
1answer
97 views

Interactive Chess Whiteboard

I am a coach at a small high school. We are starting a chess club. We have Epson BrightLink projectors with the interactive boards. Is there a way we can have a chess board displayed on the whiteboard ...
2
votes
1answer
52 views

Speed of minimax with alpha beta pruning in chess engines

Can a minimax function with just alpha beta pruning really evaluate 1.8 billion chess positions (3 ply = 356) in just a second? My chess engine, which uses minimax with only alpha beta pruning, takes ...
8
votes
5answers
2k views

How to study endgames?

There are lot of recommendations on what endgame books you should read and study. But reading is just passive learning, and not so efficient. If the book doesn't contain exercises, what is the best ...

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