Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [theory]

Theory commonly refers to the erudite study and the philosophy behind the moves in chess (like opening or endgame theory) but this tag can also be used for questions about the game theoretic study of the game itself.

1
vote
4answers
145 views

Why aren't 1.e4 g6 2.d4 Bh6, and 1.e4 b6 2.d4 Ba6 considered by theory?

As the title above, why aren't 1.e4 g6 2.d4 Bh6, and 1.e4 b6 2.d4 Ba6 (or eventually beginning with 1.d4) for Black not even considered by theory? Isn't the eventual early trade-off of White's strong ...
1
vote
0answers
74 views

If every move is made completely randomly (yet legally), how many possible different games are there (assuming 50 move rule)? [duplicate]

If both sides make moves completely randomly but legally, how many different games are there? Since 50 move rule applies, this number should be finite (but HUGE). For example, there are 20 possible ...
-1
votes
1answer
116 views

Is this the longest possible series of consecutive captures?

Quite simply, is this the longest possible series of consecutive captures in a legally reachable, legal game? I composed this particular party myself. [FEN "q1kr2q1/1qnqnb2/2prp3/q2pK3/2P1P3/1QNQNB2/...
3
votes
5answers
140 views

Is learning the English Opening helpful for learning the Sicilian Defence? How about vice versa?

Is learning the opening 1. c4 e5 as white helpful in learning the opening 1. e4 c5? How about vice versa? Are the ideas behind the Sicilian Defence as black very similar to the ideas behind the ...
5
votes
1answer
196 views

What is the longest possible sequence of double checks?

Note: My frequent edits are to either upgrade what I have found or to fix an illegal position or a flaw. It is a known record for most number of mutual checks in a row. This made me wonder what the ...
5
votes
0answers
256 views

What are the shortest possible games with a) 20 Bishops, b) 20 Knights, and c) 20 Rooks?

The 18 queeens chess problem has already been brought up one CSE: Shortest possible game with 18 queens? That is a game where all 16 pawns are promoted to Queens. But nobody who asked this yet: What ...
6
votes
1answer
102 views

Comparing 9…a6 to 9…b6 in the Panov-Botvinnik Attack

This question is motivated by a recent LiChess game where I was black where I played the Caro-Kann and white played the Panov-Botvinnik Attack: [fen ""] [Site "https://lichess.org/J9cdDkL5"] [Date "...
0
votes
4answers
143 views

Can someone make a puzzle in which a KNN vs. K checkmate is forced in the end?

No, I am not asking if a KNN vs. K can be forced if those are all that's on the board. It is well known that this is impossible. (I wasn't quite sure om if I should have put this in here or in the ...
4
votes
2answers
223 views

Piece And Pawn Only Massacre Games

Just another theory thought of mine. I believe I have found the fastest way for each variation. Am I right or am I wrong? EDIT: Now a sub-category of Piece Massacre is open in which pawn captures are ...
1
vote
2answers
190 views

Is this the quickest way to clearing the board to two kings?

Is 21 moves the least needed to get board down to 2 kings? My findings: https://www.apronus.com/chess/pgnviewer/?m=...
1
vote
1answer
118 views

Is there a faster way to do horizontal castling checkmate?

See my former question about vertical castling here. Horizontal: wherein the rook attacks down a rank. I have composed horizontal castling checkmates for both the queenside and kingside (links below....
2
votes
3answers
140 views

What is the fastest vertical castling checkmate for both the kingside and the queenside?

Vertical: wherein the rook attacks down a file. Since I like to know fast ways to do theoretical objectives in chess, I wish to know the fastest possible castling checkmate, for both queenside and ...
2
votes
2answers
134 views

What should be defined as an en passant checkmate?

Is there a general consensus amongst top chess players, composers, analyzists, and organizations, such as FIDE, for what exactly defines an en passant checkmate? Is there any history for it? As far ...
-5
votes
2answers
177 views

Is 6 the limit for the most pawns possible on a single file?

As far as I can calculate, 6 is the limit for the most number of pawns on a single file possible. Is 7 possible at all, ignoring promotion? I only took into account using the edge of the board, not ...
4
votes
3answers
201 views

On the board: white king vs. black king with knight and rook. Could checkmate be done without the black king’s help?

Just something I randomly came up with. Sorry if it is a duplicate.
1
vote
3answers
160 views

What are the quckest helpmates delivered by rook, knight, bishop, and pawn?

What are the quickest helpmates, which is where both sides help administer checkmate to one side, delivered by the rook, knight, bishop, and pawn? Said piece has to deliver the checkmate on the final ...
4
votes
2answers
195 views

Can anyone recommend a Chess platform that, well, you better read further

I thought I might take a minute to share a project I started about 20 years ago. Essentially, I used my ChessMaster program to make a "Chess Explorer". In 1998, I noticed I could add notes into ...
1
vote
3answers
214 views

How does one know if a position is not reachable from a series of legal moves from the starting position?

If one of the following is true, a position is not reachable from the starting position by a series of legal moves: One side has two or more kings or one side has no kings; One side has a total of ...
18
votes
5answers
3k views

What is the theoretical maximal material difference of a dead draw which is not a stalemate?

I have noticed the following example, which should be a dead draw: I am wondering what is the theoretical material difference of a dead draw which is not a stalemate? (I am not asking about agreed ...
1
vote
0answers
37 views

Daily chess self-training plan? [duplicate]

Here I am asking suggestions on plans to systematically improve one's chess skills. I am aware of questions such as this one, but I am seeking advice based on the following criteria: I am willing to ...
3
votes
1answer
187 views

Is the queens gambit declined getting more popular than the slav?

Back when I used to study chess, like 10 years ago or so, all the text books and all the super GMs recommended either the slav or the semi slav against queens gambit, they said it's better than the ...
-4
votes
3answers
178 views

What are unsolved problems in chess? [closed]

What I want to know is: are there any problems in chess that remain unsolved?
-2
votes
2answers
69 views

Do someone found if there exists a ever winning side? [duplicate]

Have chess science advanced enough to determine if there is a a chess side that always win if both sides are given unlimited time to think for the next move? Note the question Is not dumb as might ...
11
votes
1answer
3k views

What is the least number of knights needed to cover the entire board?

I’ve seen the solutions to the lowest amount of queens, bishops, and rooks are needed to cover an entire board, as in they can attack all squares and are the only type of piece on the board. What is ...
3
votes
3answers
181 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 ...
4
votes
1answer
309 views

Would a chess game go on indefinitely if both players played the absolute best move each turn?

Just as the title says: Would a chess game go on indefinitely if both players played the absolute best move each turn? (assuming there is no draw) Or is it white that's going to win? Is it even ...
28
votes
3answers
4k views

Why is the Ruy Lopez a sensible opening for white?

As an amateur, I prefer the Scotch game as opposed to Ruy Lopez, since I feel that White loses tempo and Black seems to gain tempo with queenside counterplay in the main line. [title "Ruy Lopez"] [...
3
votes
1answer
238 views

2 Knights against 1 pawn (endgame)

Why is it important to leave the opponent's pawn in this situation? From over 7kk games only 426 ends with KNN against KP, of which 286 games (67.1%) is draw. In the two knights endgame, how should ...
9
votes
2answers
408 views

Why isn't 3.e4 more popular in the QGA?

According to the chess.com DB, 3.e4 is the third most popular reply in the Queen's Gambit Accepted - but why isn't it the most popular by a long shot? Isn't the entire point to remove black's central ...
5
votes
3answers
168 views

Theory: Things NOT to do in a concrete opening

My sources of opening theory are mostly focuses on things to do in it, and some ideas about why. What are good sources about things to avoid, and ideas that can't be developed in an opening?
7
votes
6answers
1k views

Feeling cramped in the Najdorf

I played this game recently at a tournament, and lost pretty decisively. I thought about it a bit, and I think it's representative of something that happens somewhat often in my games when I play the ...
6
votes
0answers
190 views

What is the longest variation analysed in opening theory? [closed]

There are many openings with long variations, more or less forced, in their body of theory which are recognized as playable by both sides : Marshall Attack and Schliemann Defense in the Ruy Lopez, ...
2
votes
2answers
173 views

Modern defense Benoni setup with Ne7

I saw a DVD with GM Roman Dzindzichashvili, where he recommended, when white avoids the Dzindzi-Indian by playing 3. e4, that black adopt a Benoni setup but with the important difference of playing ...
11
votes
4answers
3k views

Are there rules for categorising all pawn-only endgames into won/drawn/lost?

If a situation containing only pawns and kings is displayed is there a simple set of rules for determining if the position is won/drawn/lost? I know for single pawn and double pawn endgames this is ...
4
votes
3answers
320 views

What is the theory behind Bishop's Opening, Philidor Counter-Attack?

What is the theory for this opening for black? [FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"] 1. e4 e5 2. Bc4 c6 I've started playing the Bishop's Opening because it is something ...
2
votes
1answer
120 views

Main Ideas behind Spanish Game, Cozio Defense

I've been practicing the Spanish Game so I can have better tournament results with it, Spanish Game 1. e4 e5 2. Nf3 Nc6 Spanish Game, Cozio Defense and I asked my friend to play the Cozio defense, ...
25
votes
8answers
4k views

Is preventing an opponent from castling considered an advantage?

All else being equal, if you have forced your opponent to move their king, thus preventing castling, would that be considered an advantage?
4
votes
1answer
413 views

Four player chess (team): is there some opening theory written somewhere?

I am an active player on four player team chess on chess.com (my Elo is currently 2095). I am planning to write something about theory of opening of this chess variant. Question is, do you know if ...
-1
votes
3answers
305 views

What is zugzwang in chess?

What is the Zugzwang? I have read this term in chess book but the term not much clear to me. Anyone know to to use this and what are the advantage of this?
1
vote
2answers
1k views

What are weak squares in chess; how can they help to mate another player? [closed]

I read this concept in a book but I didn't understand much about the concept. Can anybody explain this concept with an example?
6
votes
4answers
275 views

Formulating a Precise Definition of “Space” in Chess

Premise I have always enjoyed playing recreational chess, so I know the basics and some general tactics / strategies. It was only recently though that I have gone more hardcore, so to speak, with my ...
-3
votes
2answers
588 views

To what depth has chess been solved? [closed]

Starting from the starting position, how many moves deep have we analyzed the possible continuations?
3
votes
1answer
120 views

How do you 'calculate' compensation in chess

Here is another very difficult subject for me that I can't even begin to understand [ incidentally, although I've been playing chess for over 50 years, my current ELO rating is only 1300, hence these ...
18
votes
5answers
5k views

What is 'space' on a chessboard?

I know, I know, this sounds like a ridiculous question, but bare with me. As an example of my lack of understanding, let's take the advanced variation of the French defense. e4 e6 d4 d5 e5. The ...
4
votes
2answers
281 views

How to analyse an endgame quickly?

I am a relatively new player (less than 1 year, ungraded) but I feel I have made good progress so far. I am playing competitively with players in the 1300-1500 region and would like to continue my ...
6
votes
9answers
2k views

1. c4 vs c3 Sicilian

I am a chess player ranked at around 1400. As white I play 1. e4 and am confident playing against most responses except for the Sicilian. I don't want to go into the main lines so I am studying the c3 ...
2
votes
0answers
71 views

Chess RSS feeds

Would anyone have any recommended RSS feeds for chess strategy? Specifically tactics, middle game and end game strategies. When I look on Google search I see a decent amount come up and would prefer ...
7
votes
2answers
408 views

In the Giuoco Piano, why is 4.0-0 currently so popular at top level?

[FEN ""] 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.0-0 In recent years, the move 4.0-0 has taken over from 4.d3 almost entirely -- in my database of TWIC games, if I look at 2750+ games from the last year, I ...
4
votes
1answer
130 views

Are certain tactics always good or does it really depend on the game?

I've recently joined chess.com at the suggestion from chess club. Something I've always struggled to understand with chess is why certain moves are "good" and why others are "bad" I got thinking ...
7
votes
3answers
1k views

Maximum number of pieces on board in dead position

It is possible in a chess game to have a dead position in which both players have all eight pawns, one bishop, and a king--20 pieces total. If the two players' pawns are interlocked in "zig-zag" ...