All Questions

1
vote
0answers
9 views

Why doesn't white play Bd2 after this …Qa5+?

I was looking at an analysis which shows this position ( from Bacrot - McShane 2018). At this point Black just played ...Qa5+, and the only moves that are analyzed for white are Kf2, c3 and Qd2. This ...
0
votes
0answers
35 views

Are a pair of bishops of the same colour usually worth less than a pair of bishops of different colours?

People have been discussing about the value of a pair of two bishops. I am wondering if two bishops are of the same colour, are they generally worth less than a pair of bishops of different colours? ...
0
votes
1answer
53 views

Is my representation of the Pirc Defense correct?

I tried to represents all the main lines of the Pirc Defense to play at a 2000 ELO level. Am I right with the following tree? What I mean by right is I wonder if I do not miss any popular line or ...
3
votes
1answer
207 views

Advancing the c6 pawn in the Caro-Kann

I am having trouble understanding when Black should move c5 in The Advanced Variation of the Caro-Kann. I have posted two games of mine below: In this first game, after the seventh move of White, ...
2
votes
0answers
32 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 ...
0
votes
1answer
33 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 ...
3
votes
1answer
108 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
18 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
84 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 ...
12
votes
1answer
1k views

Was the value of thorn (“fawn”) 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
90 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 ...
3
votes
1answer
133 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?
-6
votes
0answers
43 views

What is one way make 16 passed pawns and then checkmate?

I was thinking and thought of the following scenario. What is one way to get 16 passes pawns, BUT, on the last move, the 16th pawn becomes past AT THE SAME TIME that checkmate occurs. It may be a bit ...
-3
votes
1answer
126 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
68 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
42 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 ...
0
votes
3answers
232 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
27 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 ...
1
vote
1answer
93 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
116 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
25 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 ...
0
votes
1answer
55 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 ...
26
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
127 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 ...
2
votes
1answer
142 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 ...
6
votes
5answers
176 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 ...
0
votes
0answers
61 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
56 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
67 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 ...
0
votes
1answer
112 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
371 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
56 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
90 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
46 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
0answers
33 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
114 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
134 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
65 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
157 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
99 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
63 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
192 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
54 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
61 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 ...
0
votes
0answers
24 views

Linux 64 Arena doesn't start

When I updated my system Arena wouldn't start, saying it needed the Adwaita theme. Now after installing updates when I open Arena in console, Arena doesn't show errors but the window doesn't open.
5
votes
2answers
625 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?
0
votes
2answers
128 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
258 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 ...

15 30 50 per page