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3
votes
1answer
489 views

Why does the black king evade to f8, and not to h7?

First time here, I'm sorry if I'm asking in the wrong place. I'm trying to practice with the app https://f-droid.org/en/packages/jwtc.android.chess Why does the black king go to f8, and not Kh7 ...
2
votes
1answer
62 views

What happened to CCLA?

Did the CCLA get folded into ICCF or USCF or just go out of business? Did it merge with yet some other chess group? What did happen to CCLA?
0
votes
0answers
34 views

Are there any others sponsoring postal chess after FIDE USCF ICCF CCLA?

Is there a list of all the people sponsoring 'postal' chess? USCF and ICCF seem to be the two main ones. Does FIDE do it? Does CCLA still exist? I would guess that some web sites could be doing it ...
7
votes
3answers
938 views

Beating the King's Indian Defense: strategic ideas?

I'm a Queen's Gambit player and quite often I find myself against the King's Indian Defense. Usually all the lines of the QG that lead to a closed center with white playing d5 (King's Indian, Benoni, ...
5
votes
1answer
292 views

Does FIDE or USCF allow ICCF type numerical notation instead of the so called algebraid?

ICCF uses pure numerical notation counting each square by row and column eg 11 to 88. So Pd4 often written just d4 - would be 2224 so there can never be any confusion should two pieces be able to ...
0
votes
3answers
128 views

Why is it called a draw?

There's no information as to why it's called a draw. Some of my students start to take out a pencil and paper and literally draw in the middle of the game. Why is it called a draw?
4
votes
1answer
2k views

Chess.com's daily problem-Why doesn't 1…Nf8 win the Nh7?

Shouldn't 1...Nf8 win here too? Why not?
3
votes
2answers
218 views

If a Woman Grandmaster (WGM) transitions to a man, does he retain the WGM title?

If a Woman Grandmaster (WGM) transitions to a man, does he retain the WGM title? Related, but not part of this question: Are there any rules for transgender players in chess? which establishes that ...
3
votes
3answers
291 views

Chess Position Trainer on Linux or Minimax on Linux

Chess Position Trainer allows you to do leaf node evaluation and then minimax the results after that. Is it possible to install Chess Position Trainer on Linux? (I tried under mine, but couldn't), or ...
2
votes
4answers
2k views

Queenless Imbalanced Middlegame

I was analyzing the following position for one of the correspondence games that I am playing. In the position, white is up 2 pawns and with my limited understanding, I can't see any real compensation ...
1
vote
2answers
132 views

ICCF rule for analyzing position with another human

I do know for certain that on ICCF engines are allowed, but the question is whether analyzing the position with a human is allowed? I know that on chess.com if you let someone play on your profile you ...
0
votes
1answer
60 views

Are there any papers that highlight the problems with rating systems?

Ratings are a paradox. Mathematically they seem to dependent on other factors than ability. Yet people are obsessed with their rating as if it defines them as a person somehow. Are their any ...
3
votes
1answer
1k views

Illegal move or checkmate? [duplicate]

I was playing chess with an opponent. He had his queen in front of his king. I attacked the queen and he moved her, exposing his king directly to my rook. It was my turn to move, not his. We couldn't ...
10
votes
5answers
1k views

Level the field when letting computers play against each other

I just read this question and it made me wonder: when setting up such a game/comparison - shouldn't you try to level the computing capacity field? Or at least limit how much energy each "player" is ...
3
votes
3answers
67 views

Are there any books pamphlets or articles on how to train to play at GM level?

CL&R had an article about how Fischer trained at a spa in the adirondacks for an upcoming match. One thing he did was swim and also hold his breath for as long as he could. Not sure that ...
3
votes
1answer
53 views

Are there any current studies on the physical effects of playing chess?

In the 50s Eliot Hearst printed the results of a study in "Chess Life and Review" (A private publication by I A Horowitz editor later merged into the USCF's monthly magazine, and later renamed "Chess ...
9
votes
3answers
1k views

Knowing that AlphaZero beat Stockfish 8 (28 wins, 0 losses, and 72 draws), what would AlphaZero's rating be?

I found three different questions here on SEC that asked what Stockfish 8's rating was for the match against AlphaZero, but none that asked what AlphaZero's rating should have been after (if it had ...
5
votes
5answers
333 views

1. e4 e5 2. f4 exf4 3. Nf3 c5 — Sicilian Defense to King's Gambit?

[FEN ""] 1.e4 e5 2.f4 exf4 3.Nf3 c5 What's the refutation of Black's unusual third move, or anyway the best way to play against it? Which is stronger, the Open Variation 4. d4 cxd4 5. Bxf4, or the ...
2
votes
1answer
35 views

Best way to loop through all possible moves (Alpha Beta)?

Essentially I'm just trying to create a somewhat efficient chess ai using an Alpha Beta Pruning approach for a future neural network to train against. I know I could use an existing program but this ...
2
votes
1answer
145 views

What was one shortcoming of alpha zero that Kasparov noted?

I [kasparov] can look at AlphaZero’s games and understand the potential weaknesses. And I believe it has made some inaccurate evaluations, which is natural. The reason he says that is alphazero ...
1
vote
0answers
53 views

Games with three en passants

Games with two en passants in them are are uncommon, and games with three are exceeding rare, and four has never been achieved as far as I know. I only know of four games with three en passant ...
1
vote
1answer
115 views

What was it that AlphaZero did that dazzled experts?

Wired magazine recently said Most remarkably, AlphaZero uncovered new approaches to the game that dazzled chess experts. Just what was unique about alpha zero that was so dazzline?
1
vote
1answer
38 views

Searching for a position in the mega database 2020 with ChessBase 15

The setup is ChessBase 15 with the mega database 2020. I look in it for the Najdorf starting position [FEN "rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq - 0 1"] as follows : I double ...
1
vote
2answers
47 views

Alpha-beta add variance/handicap

I want to implement a handicap for my engine and Im struggling with it. I using alpha-beta pruning. In my current approach I set a variance variable in centipawns and let the engine choose a move in ...
2
votes
1answer
96 views

Castling - “king & rook must be on the same rank” = “Only original rooks can do Castling”?

According to Wikipedia, one of the conditions of Castling is: The king and the rook must be on the same rank (Schiller 2003:19). It's because Without this additional restriction, it would be ...
4
votes
5answers
158 views

Programmatic method to determine if a move is passive or aggressive

I'm currently trying to determine if a player on average plays more aggressive or defensive games. To do this I wanted to look at a game from that player, then average the amount of aggressive moves ...
10
votes
2answers
2k views

Is there a horizontally mirrored London System, and what is it called?

London System is an opening for white, that goes d4, Bf4, e3, Nf3, Nd2, c3. The move order generally doesn't matter too much and there are lots of ways to transpose into this. However, what I want to ...
11
votes
6answers
5k views

How to play against higher rated (much stronger) players?

I am about to play a master. That is an important game, and I want to win that game. What should I do and how to prepare? Is there something special I can do, like special opening, sharp lines,...
0
votes
2answers
100 views

What is it like to be a Twitch chess streamer? [closed]

I want to make a Twitch stream channel with my friend, and I want to know what the experience is like. Can explain it better to me or share their knowledge and experience?
4
votes
2answers
177 views

The difficulty of finding the exact losing move

Are there examples of chess games where the exact losing move has been found only with the help of engines? Better still, games where the exact losing move cannot be found even by the best current ...
0
votes
0answers
52 views

Examples of moves only probably losing [closed]

What are some examples chess moves that seem to be "weak" only because they seem to be refuted by sacrificial maneuvers lengthy and practically impossible to thoroughly calculate? The context can be ...
2
votes
1answer
59 views

How does Stockfish calculate advantage? [duplicate]

Recently when I was on Lichess, somebody pointed out in chat that Stockfish calculated advantage based on what it considered as the best move for both sides. However, when we play the best moves (...
5
votes
2answers
126 views

Why did Kasparov avoid the Marshall Attack?(With White)

I read that during Kasparov's long chess career he always avoided the Marshall attack with Anti-marshalls(h3 and a4). This seems very counter-intuitive to me since the positions that arise from the ...
3
votes
1answer
54 views

Did any other language than English ever use Descriptive notation? Which languages have always used Algebraic?

Descriptive notation seems to be limited to certain languages like English, and I found a Wikipedia article that mentions Spanish and French. I have never seen a Russian book that uses Descriptive, ...
30
votes
4answers
10k views

Is Stockfish 11 (level 20) beatable?

I have heard many people saying, “Hah! I beat Stockfish,” and one saying, “I am the best chess player ever! I beat Stockfish.” So I wonder if it is possible, just to know whether I should try to beat ...
1
vote
0answers
45 views

Are there studies showing that descriptive notation is easier to use for blindfold than algebraic notation?

What studies have compared effectiveness for thinking by chessplayers using descriptive vs algebraic notation?
0
votes
0answers
43 views

Is calling moves by initial letters better for calculating? [closed]

Is calling moves by initial letters better for calculating? By better, I mean saying Qe5 in your mind, instead thinking of Queen to e5, for one example. This is not that much of a subjective question ...
1
vote
0answers
57 views

What effects would being able to capture while castling have?

Capturing an enemy piece while castling has been illegal for many decades, and the concept has been solidified in chess history. But what effects would it have if it were allowed? First, some ground ...
4
votes
2answers
1k views

Mosquito Gambit?

[FEN ""] [startply "5"] 1. d4 e5 2. dxe5 Qh4 3. Nf3 I reached this position after following the line for the Englund Gambit. Lichess says that this is known as the Mosquito Gambit. Is it a joke ...
8
votes
3answers
2k views

Why don't we see more Kings Indian Defenses in top level chess?

One of the most interesting openings, in my opinion, is the Kings Indian Defense (KID). 2-4 decades ago it used to be very popular at the top level with Bobby Fischer and Garry Kasparov using it ...
2
votes
2answers
103 views

What is an “artificial” move?

Sometimes I see a move or serial of moves described as "artificial" What does this mean? Here is one example, comments by Kasparov on move 10. ..cxd4. Taken from "Garry Kasparov on Garry Kasparov, ...
2
votes
1answer
53 views

What do DTM, DTZ, DTC, DTR, DTZ50, and DTZR mean?

I need help clarifying the abbreviations and acronyms used in endgame tablebases. Just what do DTM, DTZ, DTC, DTR, DTZ50, DTZR mean?
15
votes
2answers
4k views

How to indicate that “I need more time to consider your draw offer” in a formal game?

When my opponent makes a draw offer, I will consider whether to accept this draw offer or not and this consideration could take very long, say 20 minutes or more. What is a good etiquette now to ...
3
votes
1answer
90 views

What is the longest wait before a draw offer is accepted?

If I understand correctly, once player A makes a draw offer, the opponent player B retains the right to accept the draw offer as long as player B does not rejected it verbally, or touch a piece with ...
14
votes
2answers
5k views

Why is offering draw not recorded but giving a check recorded?

In recording a game, one typically does not record offering draws (if yes, how and is it required?) while one does indicate that a particular move gives a check by using + (or ++ for double checks). ...
3
votes
2answers
82 views

Export KPvK endings positions (up to black/white symmetry) from ChessBase 15 using python-chess

I have the megadatabase 2020 from chessbase and chessbase 15. I am using chessbase 15 to search the megadatabase 2020, my seach criterion being all games ended through a KPvK (king and pawn vs king) ...
6
votes
4answers
809 views

Flexibility over solidity? Defending against 1. e4

When defending against 1. e4, I'm a French Defense player. I enjoy the French Defense very much, and my win rate with it is fairly good. Lately, though, I've been wanting to explore new defenses, only ...
2
votes
1answer
100 views

Chess variants-Anyone recall the name for one that has a “superpiece” with the movements of the queen and knight?

What is the name of the chess piece in a variant game where there is a piece that moves like the queen AND a knight? Is there a name for this variant?
22
votes
4answers
6k views

Is there a name for a chess variant where you are allowed to capture your own pieces?

I occasionally think it might be fun to play a chess variant that is exactly the same as regular chess, except that it is permitted to capture your own pieces as well as your opponent's pieces - so, ...
7
votes
1answer
470 views

Your time is up on an online correspondence game but your oponnent has only his king; is it a draw?

If your time is up on a timed game, but your oponnent has only a king, the game is drawn. Does this rule apply to online correspondence games?

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