All Questions

12
votes
2answers
381 views
+50

Can an Irwin Cheat Detector catch a user who is using a Leela chess bot for cheating?

I’m a big fan of chess cheat detection apps, like Irwin that was created by lichess.org. But I heard that there is a new bot called Leela that is teaching herself how to play chess, and to think in a ...
2
votes
1answer
78 views

What is the most suitable position for a bishop here?

Recently I played a game with White whose link is: https://lichess.org/pAoAUp4O/white#42 and reached this position: I am having a hard time finding why the moves I played next (22. Rxe8+? Rxe8 23. ...
6
votes
4answers
2k views

Is it possible to capture en passant twice with the same pawn?

I am still confused about the en passant rule. There are two possibilities that I am not clear about. [FEN ""] 1. d4 d6 2. d5 c5 3. dxc6 b5 ( 3. c4 e5 4. dxe6) Scenario 1 :: The main line above Is ...
3
votes
3answers
318 views

Can a pawn that performed an en passant capture promote at all?

So let's say I capture en passant with a pawn. Using the same pawn, I get to the 8th rank. Can I promote that pawn into anything else? I've heard of this restriction in various ways. Some say it can ...
11
votes
6answers
2k views

King or Queen-Which piece is which?

I recently bought a set of wooden chess pieces, which I liked for it's simplicity. However, I'm not sure which one is supposed to be the king and which one is supposed to be the queen. I would say ...
1
vote
0answers
30 views

How to search for exact position (FEN) in CQL 5?

I am using CQL 5 port in SCIDvsPC 4.19, my basic working query in CQL search window currently looks like this: cql () initial {player white "Anand" result 1-0} How would one include FEN string ...
1
vote
1answer
27 views

Fairy endgame statistics for KDDDDvKN (D=dabbaba; '2,0' leaper)?

The dabbaba is a '2,0' leaper fairy piece, only able to ever reach a quarter of the squares on the board. According to the linked Wikipedia page, a quartet of them can apparently "easily" force mate ...
2
votes
1answer
33 views

How to use the Ponder option in stockfish / UCI

I'm trying to understand stockfish Ponder functionality. I'm very interested to let stockfish think when the opponent is thinking. From what I understand you can do it as follows $> uci $> ...
5
votes
2answers
138 views

Looking for an iPhone app for working out chess problems

I'm looking for an iPhone app that will allow me to set up a chess problem and work out its solution. I've seen apps that present me with a battery of chess problems but don't allow me to set up my ...
7
votes
5answers
220 views

Why does Fishtesting test Stockfish against itself, not other engines?

As I understand the so-called Fishtesting, people write patches, then try the patches against the current version of Stockfish. If the new version performs better, it's promoted to be the main version;...
2
votes
0answers
55 views

Draw rates in classical chess between elite players?

I'm looking for detailed statistics exhibiting draw rate for elite players. I did find this and this publications, however, they only contain aggregated data for 2600+ players, and arrive at a figure ...
1
vote
2answers
195 views

Long algebraic notation-piece promotion

I am building a chess engine with the use of Artificial Intelligence, and i am almost done as long as the AI and the internal game mechanics are concerned. Currently i am training the AI and i want ...
22
votes
5answers
2k views

Least number of moves to achieve a complete switchover of nonpawns in starting setup

[fen "RNBQKBNR/8/8/pppppppp/PPPPPPPP/8/8/rnbqkbnr w - - 0 1"] During a comp, my friend an I had a team kill and we decided to make this position(legally) before drawing. Then we continued to find ...
4
votes
1answer
298 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 ...
8
votes
3answers
1k views

THE longest problem ever (much longer than the mere 517 mover…)

The "Fireside Book of Chess" by I. Chernev and F. Reinfeld includes the following diagram [fen "3nk3/3NN3/3PP3/3BB3/3PP3/3PP3/3PP3/2RQKR2 w - - 0 1"] Composed by J.N. Babson for Bretano's Chess ...
3
votes
1answer
118 views

Where can I find these mentioned chess problems?

In his article on “The Horse Concoction", Tim Krabbe mentions retrograde analysis questions that center around checkmate and involve 10 rooks, knights, and bishops. The 10 rooks problem is one that he ...
1
vote
1answer
47 views

Chessbase: how to efficiently use two reference database simultaneously

In Chessbase I use the Mega Database as my reference database when in a board. However, I recently downloaded a Correspondence database and would like to look up positions in it as well. Is there a ...
5
votes
1answer
256 views

Shortest sequence of moves to create biggest material imbalance

What is the shortest game with the largest material imbalance? This of course means that one side will have 9 queens, 2 rooks, 2 bishops, 2 knights, and a king, and a bare king on the other side. From ...
2
votes
3answers
134 views

Longest sequence with only moves to draw without a repitition

What is the longest known sequence of moves with upto 6 pieces where each move of both sides is the only move drawing the game (any other move would lose the game) ? There should not occur any ...
2
votes
3answers
238 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=...
15
votes
4answers
2k views

What is the longest known sequence of forced moves leading to a checkmate for one side?

With forced move, it is meant that the player has only one legal move. [fen "7k/q5Q1/p4PPK/6PP/8/5P2/8/8 b - - 0 1"] 1... Qxg7+ 2. fxg7+ Kg8 3. f4 a5 4. f5 a4 5. f6 a3 6. f7# is an example with 10 ...
3
votes
3answers
191 views

Sicilian Defence, Dragon Variation

[FEN ""] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. O-O-O d5 10. exd5 Nxd5 11. Nxc6 bxc6 12. Bd4 What is White's plan & idea behind 12. Bd4 move?
1
vote
3answers
136 views

Ruy Lopez, Exchange Variation

[FEN ""] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3 f6 Theory recommends 5. ... f6. Why? What is the specific reason behind this move? How this move helps Black? Other than 5. ... f6, are ...
9
votes
2answers
926 views

Why is Na5 not played in this line of the French Defense, Advance Variation?

I find Na5 a good resource for black in this line of the french, profiting from the fact that white's b-pawn is binned to the bishop. As far as I can understand this position with my limited chess, I ...
8
votes
2answers
230 views

White's Response to the Norwegian Defense

In the Norwegian Defense of the Ruy Lopez [FEN ""] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5 Neil MacDonald suggests 6. O-O as a response. Why isn't 6. d4 suggested in the book? Edit: 6......
-12
votes
2answers
173 views

Why are masters so bad at endings? [closed]

The other day I witnessed a National Master fail to checkmate using a queen vs rook. I witnessed some of the worst technique known to man by a 2200+ player. It's clear he didn't know Philidor's ...
7
votes
2answers
395 views

Did Richard Teichmann fail to take his “bishop pair” idea to its logical conclusion?

Playing Black in a game against J.R. Capablanca, Richard Teichmann accepted an isolated queen pawn as the price for getting a bishop pair On move 20, White played Nf5, attacking his black squared ...
2
votes
2answers
172 views

Longest series of mutual “!” moves

Normally I'd pester the/a computer chess forum, but I couldn't register yet... On a problem chess forum (MatPlus), the following came up. Both White and Black are on the brink of losing because the ...
4
votes
1answer
165 views

Are there any attempts at writing Stockfish MCTS?

As of time of writing, there is one major traditional engine using Monte Carlo Tree Search for its search algorithm - Komodo. The MCTS version of Komodo started out weak but gained strength quickly, ...
2
votes
4answers
748 views

How many windmills types exist in chess?

I'm interested in chess patterns similar to the windmill. If you think there are none more than the ones that I'm listing I'm interested in a proof that satisfies me to stop looking for more of them. ...
10
votes
4answers
4k views

Is White controlling this game?

Which side is in a better position here : white or black ? Is White controlling this game as all rook, knight, bishop, queen are in open position now ? What are the chances for black to come back ? [...
8
votes
2answers
197 views

Did predecessors of modern chess use dice to determine which piece to move?

According to the Wikipedia article of Magic: The Gathering, creator Dr. Richard Garfield has compared the evolution of the game from luck to skill as being similar to that of chess. According to Dr....
3
votes
4answers
206 views

Casual chess meet up in London UK

I’m a (predominantly) online chess player. My rating is roughly FIDE 1800-1900. I’m travelling to the UK next week for work. Is there a place or club or cafe in the inner or outer London area where I ...
1
vote
2answers
71 views

Options for following the Norway Chess tournament live

I've heard a new tournament format is being adopted in the new series of Norway Chess, where each drawn classical game is followed by an Armageddon game in order to conclude with a decisive result for ...
5
votes
2answers
173 views

Leela Chess Zero - UCI engine

What is current use status of Leela for practical player? Is it already working well as UCI? Could anybody give some insight on strength with various thinking times, especially in analysis mode? As ...
12
votes
5answers
3k views

What are the benefits of learning to play chess as an adult (30s) if any?

I played chess when I was a child, but never got into it seriously (I didn't know it was possible at that age). Nowadays I'm playing regularly as a hobby and I'm interested in how this can affect my ...
7
votes
0answers
85 views

Historical origin of the queen as a chess piece

As far as I know, chess was introduced at Europe from Arabia by a Spanish king: Alfonso X. I recently read an article in Spanish press saying the queen was also introduced as a piece in Spain. The ...
5
votes
0answers
76 views

Chess database software for variants

For regular chess, I use SCID and it works well. Database searches, position searches, player stats, and a nice compact file format (i.e. not PGN, which is inefficient and big.) Is there any similar ...
2
votes
6answers
245 views

What is the reason (if any) for 1.e4 c5 2.Nf3 d6 3.Nc3?

As title above, what is the point of playing 3.Nc3 (before d2-d4) after 1.e4 c5 2.Nf3 d6? Compared to the “normal” 1.e4 c5 2.Nf3 d6 3.d4? [fen ""] [Variant "Standard"] [ECO "B50"] [Opening "Sicilian ...
7
votes
3answers
4k views

Engine not necessarily playing strong but “attractive”

Does anyone know a chess engine that is not programmed to be as strong as possible, but to play "attractive" chess ? The program should have an aggressive style and play for mate attacks, even if ...
21
votes
5answers
6k views

Should an arbiter claim draw at a K+R vs K+R endgame?

I was asked for first time to help at a non federated tournament for kids to arbitrate their games, played at 30 minutes with no increment time. It was a scholar tournament and they made mistakes as ...
5
votes
1answer
264 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 ...
4
votes
2answers
135 views

What should I do when the announcement of a tournament is violated by the… chief arbiter?

Some months before an official national tournament is held, there is an announcement of it which contains who can participate, some rules (e.g. no draw offers until the 30th move), etc. Since I was ...
16
votes
2answers
2k views

What should the arbiter and what should have I done in this case?

Recently, an official (FIDE-rated), tournament was held, where I participated, too. At the last round, the most critical one, I was black and my opponent white. Suddenly, in the middle of the game, ...
9
votes
3answers
753 views

Why is c4 bad when playing the London against a King's Indian?

Recently I (rated ~1900 "classical" on Lichess) played the following opening: 1.d4 Nf6 2.Bf4 g6 3.e3 Bg7 4.Nf3 O-O 5.Nbd2 d6 6.c4 [FEN "rnbq1rk1/ppp1ppbp/3p1np1/8/2PP1B2/4PN2/PP1N1PPP/R2QKB1R w KQ - ...
-5
votes
3answers
174 views

What are the rules of chess in a nutshell?

I believe the question How to start learning chess? is actually two questions only one of which is a duplicate. This question is a fixed up version of it which asks only the other one of those ...
4
votes
3answers
3k views

Is takeback allowed in real chess?

Is takeback allowed in real chess? All chess engines allow take backs, but that's not important, it's just a computer, we make mistakes and correct them. My question is about real chess, is it ...
8
votes
2answers
181 views

Openings in King of the hill

As you probably know, "King of the hill" (KOTH) is a variant of chess where one can win either like in classical chess or by putting the king in the central squares, namely d4, e4, d5 and e5, by a ...
18
votes
1answer
6k views

If a chess board is disturbed, can the game continue?

Let's say I'm playing a game that has technically begun (white has moved) and then the board is disturbed: say a minor earthquake shakes the pieces off the table or something. Clearly no-one has ...
14
votes
5answers
5k views

What are good openings for bullet chess?

It is evident that bullet chess has a different set of strategies from regular chess. It follows, therefore, that certain openings will be better or worse relative to their normal chess counterparts. ...

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