ETD
  • Member for 9 years, 8 months
  • Last seen more than a week ago
  • Pittsburgh, PA
How do you calculate your Tournament Performance Rating?
1 votes

This answer spells out the actual calculation of performance rating for USCF tournaments, as in the June 2017 Rating Estimator that Fred Knight's answer points to. If you view the page source at that ...

View answer
Can you identify this game with a mate in 12?
Accepted answer
12 votes

I can't find the actual game neither in my database nor at, say, chessgames.com. However, the position appears as puzzle 210 -- with the apt description "Running around like a squirrel in a cage&...

View answer
Is this endgame position a draw?
Accepted answer
17 votes

Yes, it seems to be drawn. First consider the following variation, but in particular the position after 2.Kxh5 first: [FEN "8/8/8/3k3p/3P3K/2P3R1/8/7r w - - 0 1"] 1.Rh3 Rg1 2.Kxh5 Rg8 3.Rf3 Kc4 4....

View answer
Chess Tempo #97369 - Is the problem's solution wrong?
Accepted answer
16 votes

I believe black can do no better than a draw from the starting position. First I'll give my own reasoning for it (and everything I'll say I've checked with Houdini, to rule out silly oversights on my ...

View answer
How can one determine the opening or transposed opening from the existing pawn formation/structure?
Accepted answer
8 votes

In one sense, I would simply say, "Yes, the pawn structure would be the first indicator that one has entered/transposed into a given opening." But since there's no other answer here as of yet, I'm ...

View answer
Alternatives to chessbase on OS X
Accepted answer
16 votes

I highly recommend Scid ("Shane's Chess Information Database"). Here's a screenshot of the Mac version (more to be found at Softpedia): It is completely free, has lots of functionality, and is fast (...

View answer
About forcing a checkmate
Accepted answer
10 votes

White to play and mate in 4, while forcing the black king to capture on each move: [fen "1r2qrnk/3R1bRp/pp2nBpp/p3P3/4B3/5PPQ/PPP3N1/1K6 w - - 0 1"] Solution:

View answer
Computer evaluations: How trustworthy are they?
15 votes

Different engines have different "scales" for their numerical evaluations. For instance, in a typical middlegame position with plenty of play left, when Houdini says +2.00 or better, it is highly ...

View answer
Bird's Opening and the Dutch Defense
9 votes

Looking at some results drawn from 2,000,000+ games, we have these winning percentages for the two openings: White Draw Black ----- ---- ----- Bird's 34 25 41 Dutch 42 30 ...

View answer
Strategy in middlegame from boring positions
36 votes

"Tactics is knowing what to do when there is something to do. Strategy is knowing what to do when there is nothing to do." -- Savielly Tartakower What follow are the most salient features of the ...

View answer
What Chess Software allows creating a chess Ebook?
15 votes

This may or may not be your cup of tea, but if you are a LaTeX user, then SCID's LaTeX export feature produces ready-to-compile LaTeX source that yields rather nice (IMO) PDFs quickly and painlessly. ...

View answer
Formulating a Precise Definition of "Space" in Chess
Accepted answer
2 votes

Considerations such as yours for a definition of "space" have long been a part of computer chess, and I suggest looking to that literature for ways to approach a precise, quantitative definition. The ...

View answer
A purely self-trained chess AI
21 votes

It's worth revisiting this question in light of the recent striking success of AlphaZero against Stockfish 8. A further evolution of DeepMind's AlphaGo and AlphaGo Zero programs, AlphaZero finished ...

View answer
How can I find games from grandmasters that end in threefold repetition?
6 votes

If you have a collection of games in PGN format, you could probably search for threefold repetitions using the Chess Query Language. In particular, you might look in the "Matching positions: the ...

View answer
Free chess match database
Accepted answer
15 votes

Million Base 2.5 (available from a link here) and ICOfY Base are two free options that more than meet your given criteria, each providing millions of games in PGN format to draw from as you please. In ...

View answer
Drawn R+2P vs R endgame
Accepted answer
11 votes

I don't know the game you have in mind, but the following is one example of such a drawn position in this ending (as can be verified with a tablebase query): [fen "8/8/1r4kP/6P1/2R2K2/8/8/8 w - - 0 1"...

View answer
Bobby Fischer and the U.S
Accepted answer
7 votes

It is not so much that Fischer got exiled as much as it was that he chose to exile himself (though yes, out of a certain necessity). He was indicted by a U.S. court for ignoring sanctions against ...

View answer
SCID not recognising transpositions
2 votes

Chess Position Trainer recognizes transpositions in exactly the way that you're after, as it stores its opening books in a way that's designed to address this issue. Whenever two variations (like your ...

View answer
Is chess a solved game?
Accepted answer
34 votes

Because of the observation you make, that the tree of possible game paths for chess is finite, chess is indeed solvable in exactly the same sense that tic-tac-toe is. So optimal strategies for chess ...

View answer
Kasparov quote reference
5 votes

The following passage is from Botvinnik's foreword to his 100 Selected Games. The text here doesn't single out one's own games as the specific object of analysis, but it leaves no doubt about ...

View answer
What is the result of this pawn-endgame with perfect play by both sides?
1 votes

Analysis of this general endgame appears in Staunton's Handbook, in the section "King and Three Passed Pawns against King and Three Passed Pawns." In the preceding section of the book, "King against ...

View answer
What are some examples of promoting a pawn to a rook or bishop?
13 votes

Here's another example each of a rook promotion and a bishop promotion from actual play. Neither specific promotion was quite absolutely necessary (you'll see what I mean), but neither one was at all ...

View answer
Evans Gambit b4 loss
5 votes

Compare the position after 3...Bc5 to that after 4.b4 Bxb4 5.c3 Bc5 6.d4. [fen ""] 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4` It's true that the Black bishop has simply returned to c5 and ...

View answer
Why is g4 the best move in this Queens Gambit accepted line?
8 votes

I suppose you have some source that claims 1.g4 is the best move from the diagram position, but which doesn't give any reason for it. I won't try to weigh in on whether it is in fact the best move ...

View answer
Is this endgame a draw? 2 Bishops + 4 Pawns vs Queen + 1 Pawn
Accepted answer
20 votes

Black is winning handily from the diagram position, and has a fairly straightforward strategy going forward: force the b-pawn's advance to b2 with the support of the bishops (starting with 1...Be6 to ...

View answer
Wording of Troitsky line rule
2 votes

I believe that GloriaVictis' answer addresses your first position very well, in that the pawn is not actually securely blockaded in that case; Black can force the further advance of the pawn. Your ...

View answer
Professional match where neither player castles?
Accepted answer
11 votes

It won't be terribly common, but it's not unheard of either. Here are a few examples involving well-known grandmasters: Ivanchuk-Csom (1989): [fen ""] [Event "Yerevan"] [Site "Yerevan"] [Date "1989.?...

View answer
Lowenthal-LabourdonnaisSicilian Kalashnikov Variation
3 votes

While it's a somewhat dated source by this point, I'm certain that Neil McDonald's 1995 book Winning with the Kalashnikov covers this 6.Bg5 variation to some extent, and I'm nearly certain that he ...

View answer
Why do houdini and stockfish give this seemingly stupid move?
Accepted answer
13 votes

In the given position, Black ultimately has no way to avoid an impending checkmate, hence is lost no matter what. The engines you're consulting are just trying to push that unavoidable mate as far ...

View answer
What is the maximum DTM with K+J vs K?
5 votes

I don't know the exact answer for the 10x8 board (used e.g. in Capablanca Chess, where your Janus is called the Archbishop), but I have something that could get you well along toward an exact answer, ...

View answer
1
2 3 4 5 6