All Questions

3
votes
1answer
109 views

Any online site with limited number of games per day like chess.com or chess24

I have a problem that when I start to play I cannot stop, and I am looking for some good online chess web site that have limited number of rated games per day for, lets say non premium user, or ...
1
vote
1answer
61 views

Morozevich variant in the Tarrasch french

I am confused with the Morozevich variant. I've seen quite a few funny games where they played ...g5, which gives very interesting moves, but I'm surprissed at not having seen any game in which white ...
4
votes
1answer
142 views

Heavy piece endgame with 2 extra pawn, how to convert?

1r6/5pk1/2q1p1pp/3p4/r2P4/2P4P/PPQ2PP1/R3R1K1 w - - 0 1 White to move. White is 2 passed pawns up, but black is very active. I'm sure objectively white is winning, but how? Black will attack and ...
0
votes
1answer
39 views

Is any tool which allow analyse EPD file and add evaluation score per I want specify depth/multi PV

I tested some tools which allow analysis EPD files but they not work like I want: I can use Arena but it will not annotate back EPD - it create protocol file. I can use SCID vs PC but it will not ...
1
vote
2answers
110 views

Why play 7… Nxd5 instead of 7… exd5 in the QGD?

I'm currently following the rapid game Caruana-Nakamura in the London Chess Classic, and I have a basic question about the opening moves. Why play 7... Nxd5 instead of 7... exd5? Is the idea to trade ...
15
votes
1answer
2k views

Was the value of thorn pawns fully appreciated in decades past?

Many videos on YouTube channel "Kingscrusher" which discuss the play of new neural-net engines like Leela Chess Zero focus considerable attention upon the development of "thorn pawns" which are pawns ...
1
vote
2answers
118 views

In a tournament game, what should a player do if he find that his opponent's position is impossible, which was caused by an earlier illegal move? [duplicate]

For example, if a player realises that his opponent has two bishops of the same colour after a certain legal move (and assuming that it is clearly not caused by any pawn promotion), which implies that ...
4
votes
1answer
163 views

Why did this game end with a draw?

This game starts with f4 e5 g4 IMO, black has a winning position here. How did it end with a draw?
-2
votes
1answer
144 views

What is the fastest way to an en passant checkmate AFTER all other possibile en passant have been made?

I want to know what the quickest way to an en passant mate is for either side, after all other possible en passant moves by both sides have been made. This is a very complicated question, so it is ...
1
vote
1answer
90 views

What is the most number of en passant moves possible, and the fastest way to that?

I have previously asked how many passed pawns can be gotten. So this time I am asking how many en passant moves can be done overall by both sides theoretically. I also want to know what is the ...
1
vote
1answer
50 views

Is there a Open Source or Shareware Legal Move Checker Executable?

Background: I wrote and use a custom macro in the NoteTab Pro text editor to convert PGN position analysis to XML. The resulting XML is used on my website to display chess puzzles. I need to check ...
1
vote
3answers
445 views

The games AlphaZero lost

AlphaZero lost 6 games to Stockfish in a 1000-game match from the starting position, at least one of which was with the white pieces: A game A0 lost with white. For some reason, these games haven't ...
1
vote
1answer
69 views

How is MultiPV enabled in general?

I looked at the "Description of the universal chess interface (UCI)" dated April 2006, and did not find a command or option that seemed to address how a GUI might enable MultiPV (I assume that PV ...
0
votes
1answer
119 views

Blitz games managment

Here is the problem : when I have the time, i usually find the right move. Meaning, in a longer time frame games (more than 10min) I'm doing better. I feel like struggling with 5 min. games and I don'...
2
votes
1answer
173 views

Is AlphaZero deterministic?

AlphaZero searches for moves using Monte Carlo Tree Search (MCTS). As I understand MCTS, it takes the root position, goes to a child node, and then plays random moves until one side wins. Since the ...
0
votes
1answer
67 views

Scid vs PC, how to get ECO data ?

Installed SCID vs PC. Can this give a count or frequency distribution of the ECO codes of the games ? So far unable to do this. Under the Tools tab there is a selection "Opening Report". This gives a ...
1
vote
1answer
70 views

Tablebases for variant where stalemate is a win?

Since time immemorial, some people have suggested that stalemate be declared a loss for the player who is unable to move. This proposal is sometimes called "abolishing the stalemate rule" although I ...
29
votes
9answers
7k views

Are there any gambits involving sacrificing a piece?

My impression of the word "gambit" is the sacrifice of a pawn or several pawns at the opening stage of a chess game. However, based on the definition on Wikipedia, a gambit (from ancient Italian ...
1
vote
1answer
167 views

Rules: Is this position a draw?

Is this position a draw? [fen ""] 1. Nf3 Nf6 2. Ng1 Ng8 3. Nf3 Nf6 4. Ng1 Ng8 I don't mean to ask the age-old question "is Chess a draw?"; four moves have been played here, returning to the starting ...
5
votes
2answers
473 views

Alpha Zero vs Lc0 - time for self-play

Alpha Zero defeated Stockfish after only 9 hours of self-play. On the other hand, Lc0, has been training for several months and while attaining impressive strength (to say the least...) it's still not ...
9
votes
6answers
384 views

Is it possible for a move to be recomended by engines but rejected by professional human players?

Am wondering if it is possible for a move to be considered "good" by engines but is rejected by professional human players. One possible reason that I can think of is that the in order for this move ...
1
vote
1answer
138 views

In King's gambit, is Fisher's conclusion that “3…P-KN4 … is inexact” inexact?

I was reading A Bust to the King's Gambit by Bobby Fischer. The game starts with 1 P-K4 P-K4 2 P-KB4 PxP 3 N-KB3 [FEN "rnbqkbnr/pppp1ppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R b KQkq - 0 3"] Bobby ...
0
votes
1answer
62 views

How to define a countergambit?

Am wondering if there is a definition of a countergambit. My understanding is, a countergambit happens when one side plays a gambit, instead of capturing the pawn, the other side also sacrifices a ...
0
votes
2answers
73 views

Why white retreats the knight at the beginning of the game?

This is one variation from Bird's Opening: f4 e5 2. e4 exf4 3. Nf3 d6 4. d4 g5 5. h4 g4 [FEN "rnbqkbnr/ppp2p1p/3p4/8/3PPppP/5N2/PPP3P1/RNBQKB1R w KQkq - 0 6"] The most popular move is Ng1 ...
1
vote
1answer
140 views

Explanation of my game. Can someone explain the “why” to me?

Ok, here's a game that I won. I was playing vs someone on chess.com, and playing as black. My PGN is as follows (with comments from the analysis engine): [fen ""] 1. d4 e5 2. Nf3 {MISTAKE (-0.26) The ...
6
votes
2answers
387 views

Question about the move h5

I recently played a chess game whose link is: https://lichess.org/pCFw1h2w/black#5 After running a computer analysis, I found that in this position: I know that even though Stockfish does not tell ...
0
votes
1answer
63 views

What would you suggest I play vs. the Ruy Lopez, if I already play the Two Knights Defense vs. 3. Bc4?

I play the Two Knighs Defense as Black vs. 1. e4 e5 2. Nf3 Nc6 3. Bc4, in the spirit of counterattack. What would you suggest I play as Black vs. the Ruy Lopez?
1
vote
1answer
108 views

Kasparov's Immortal: Why didn't he play 10.Qg7?

Ok, I'm looking at his game to try to improve my own. I'm "mediocre" at best, but I enjoy a good game of chess. At the end of the 9th move by both players, Kasparov has his queen on Qh6. Now, I'm ...
0
votes
1answer
56 views

Would a classic full time armageddon tiebreaker be balanced?

I think that classic chess and rapid chess are two quite different kinds of sport. The classic chess title was undecided this year 2018. Why not use the armageddon rule, that black wins if tied in ...
1
vote
1answer
156 views

How to use nodestime option in Stockfish 10?

By looking at the uci option file of Stockfish 10 I found this line: o["nodestime"] << Option(0, 0, 10000); How exactly does one use nodestime?
0
votes
2answers
131 views

Can my pc calculate to depth 125 in 15 seconds, if a chess engine is programmed well?

I have a PC, an AMD RYZEN 7 2700 with minimal graphic card and 8 GB RAM. It has 8 cores and 16 threads. If a chess engine is programmed well will it be able to calculate to a depth of 125 in 15 ...
11
votes
3answers
1k views

A rook up, can black end the checks and thereby win (LiChess.org puzzle 74754)?

A LiChess.org puzzle ends at this position with white to move. Apparently, black has a win here, but running through moves with LiChess's Stockfish, I can't seem to figure out how to end the checks. ...
2
votes
1answer
146 views

What is the average number of legal moves per turn?

For example in the first turn there are 20 possible legal moves (16 pawn moves and 4 knights moves). This number increases in the middlegame and then decreases in the Endgame. Are there some ...
1
vote
1answer
154 views

Looking for a Python chess engine

I am looking for a Python chess engine package. It must be fully contained in Python, I don't want to download separate files for the engine itself and link them up somehow. All I want it to be able ...
3
votes
3answers
170 views

Do the King's side and Queen's side pieces have different values because of which square color they start on?

I wonder if the Bishop and Knight that start out on the same color square as the opponent's King, is worth more than it's twin on the other flank. And if that is of significance when making choices ...
2
votes
1answer
107 views

Python Engines to Beat to Take the Crown

Since Python is extremely slow, chess engines are almost never written using it. I've been building a Python engine to avoid this issue (through JIT compilation), and want to compare my engine ...
1
vote
1answer
77 views

Blindfold game records of chess and xiangqi

According to Wikipedia, Timur Gareyev played 48 opponents with a mask before his eyes and sitting on an exercise bike, resulting in 35 wins, 7 draws, and 6 losses. On the other hand, the record for ...
1
vote
1answer
212 views

Why is Stockfish giving me this weird move?

When I ask for the best move for this FEN: 1rbq1rk1/b4p2/p2p3p/3Bp3/P3P3/2P4P/R2Q1PP1/4K2R w -- - 0 30 [FEN "1rbq1rk1/b4p2/p2p3p/3Bp3/P3P3/2P4P/R2Q1PP1/4K2R w - - 0 30"] Stockfish (via Python) ...
4
votes
3answers
1k views

What makes game 5 of the World Championship a draw?

I was watching recently the excellent ChessNetwork commentary of the 5th game of the WCC 2018 between Magnus Carlsen and Fabiano Caruana. The end position looked like this and players shook hands ...
0
votes
2answers
77 views

Testing an engine (UCI) against an older version of itself

I am making modifications to a chess engine. I want to get quick feedback on whether the modified version seems stronger than an unmodified version or not, by fighting the older version multiple ...
0
votes
1answer
65 views

Open source engine that doesn't lose on time

I'm looking for an open source engine (doesn't have to be very strong) that can be loaded with python chess uci module and can play at very fast time controls (few seconds plus tens of milliseconds of ...
5
votes
2answers
714 views

Next world chess championship

When and where is the next world championship? Also, when is the candidates? Where can I find the important chess tournaments online?
1
vote
2answers
146 views

Why isn't the objective of chess to capture the opponent's king? [duplicate]

The objective of chess is to put the opponent's king in a position where it cannot evade capture. Why not go all the way? Short of tremendous blunders of moving into check, chess would be completely ...
9
votes
3answers
292 views

Why isn't chess played with flat pieces?

I was wondering why Chess isn't played with flat pieces, like Shogi is, or like how Chess itself is represented online (where people mostly play with flat 2d pieces even though most sites also have a ...
3
votes
1answer
158 views

Strategy according to the pawn structure in the Caro-Kann

I have long been playing the Caro-Kann but I have never been able to come up with a plan according to the pawn structure in the games. After playing d5 (and entering the Pawn exchange variation or ...
9
votes
3answers
191 views

How to improve on the early endgame?

The late middlegame/early endgame is by far my weakest point. I often get some kind of advantage in the opening, but then struggle to convert. I do study endgames, for example I am currently reading ...
4
votes
1answer
179 views

Am I actually playing against a 1425 rated player?

I am using Deep Shredder 13 and somewhat struggled with the engine at 1400. I then managed to defeat 1425 with great ease. The game went as follows [FEN ""] 1. d4 e6 2. Bf4 Nf6 ...
3
votes
1answer
53 views

Are there any engines that present evaluations based on probability of finding moves?

All engines I'm aware of focus on finding the best moves to win the position. I'm curious whether there are any that exist that attempt to present an honest evaluation of a position, with human ...
3
votes
1answer
174 views

What is the idea behind h2-h3?

The pawn move from h2 to h3. I do not understand the reason behind this.
16
votes
8answers
7k views

Why is Carlsen being praised for his tie-break play, when Caruana made several game-losing moves?

I followed the three games live on chess24.es (for live commentary from GMs) and chess.com (for actual real time computer analysis). As per my understanding: Game 13 was mostly balanced until 19... ...

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