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I don't know how famous it is, but here is a study shown to be incorrect by computers: [Title "J. van Reek, 1987. White to play and draw."] [FEN "8/5n2/5N2/3K4/8/3p4/Rn6/1k6 w - - 0 1"] 1. Ra3 d2 2. Rd3 Nxd3 3. Ne4 d1=N! 4. Ke6 Nd8+ (4... Nh6!) 5. Kd7 Nb7 6. Kc6 Na5+ 7. Kb5 Nb3 8. Nc3+ Nxc3+ 9. Kc4 Kc2 1/2-1/2 The intended solution ...


Some of the corresponding squares are quite easy to work out, especially if you write things down (not allowed in a real game). First of all, it is clear that a5 corresponds to c6. Black can move from c6 to g4 in 4 moves. The only square that stops black's invasion and is 4 moves away from a5 is e2, so e2 corresponds to g4. The squares on the paths in ...


Endgame studies are a particular form of tactical problem. I think variety is always good here, but, most importantly, since consistency is critical for improvement at chess, I would suggest you to focus on the type of exercise you enjoy most! (You won't train for too long if it's a sacrifice rather than a pleasure.) I disagree with the "tactics can lead to ...


If a study contains only a small number of pieces it is always possible to check for accuracy. (Right now the number is six, with seven in the works.) See for example:


And one last one from a real game. Black to move and win. [Date "2003.??.??"] [White "Ibrahim"] [Black "Ibarra"] [FEN "3q4/1p1n1pk1/p1r1p1p1/2P1Pn1p/1P1N1P2/B5rP/5RPK/Q3R3 b - - 0 1"] 1... Nxd4 $1 2. Kxg3 (2. Qxd4 Rxa3 3. Rd1 Qh4 {is just up a piece.}) 2... Qh4+ $3 3. Kxh4 Nf5+ 4. Kg5 Nf8 5. g4 {and there is no defense to....} Nh7#


White to win. L Kubbel 1927 [FEN "8/8/1p6/kp3p2/p7/1PP1p2B/5p2/5R1K w - - 0 1"] 1. Ra1 $1 {Threatening Bf1 stopping the pawns.} e2 2. Bf1 $1 e1=Q 3. Rxa4+! bxa4 4. b4#


Your question is fairly opinion-based, but I will try to answer in reference to common chess thought: "Learn chess backwards" I don't know who first said it, but I think it is well regarded that one should learn chess starting with the endgame and working back toward the opening. Simple looking endgames can be incredibly complex and full of nuance; ...


A missed variation from the game Najer-Nepomniachi, Moscow 2006. Black to move and win. [FEN "5rk1/3R1p2/4p2p/4P1pP/2q4r/P1n1BQ2/2P2PP1/4R1K1 b - - 0 1"] 1... g4 2. Qg3 Qf1+ $3 3. Rxf1 (3. Kxf1 Rh1#) 3... Ne2#


My semi-educated guess at a solution:


There is The Flanders Panel, a crime novel written in 1990 by best-selling Spanish author Arturo Pérez-Reverte. The plot revolves around an old painting, where a chess position between two players appears incidentally in the background. Upon close inspection the position reveals mysterious things that I won't spoil.


Here is a study that has been busted. Perhaps it is not a famous one (it seems not to be in PDB or YACPDB). Tim Krabbé featured it in entry 376 of Open Chess Diary. Tim reported that Olli Heimo busted it. The annotations are Tim's. [Title "B. Badai, Shakhmaty v SSSR, 1965. Draw"] [fen "5k2/8/7P/6pP/8/8/8/4K1n1 w - - 0 0"] 1.Kf2 Nh3+ 2.Kf3! (2.Kg3? Nf4 3....


If you're an expert player (>2000 Elo) there is nothing wrong with taking your time on each exercise; you will get most of them eventually if you put in some serious effort. However, if you're rated 1700-1900 Elo (or even lower) you will most likely fail on most exercises in the Dvoretsky book, even if you spend lots of time on them. In this case you could ...


White to move and draw. Y. Afek 1978 [FEN "8/5N1p/8/b6p/7P/6KP/7R/4kr2 w - - 0 1"] 1. Ne5 $1 {Rf7 and Bc7 are both threatened.} Bc7 2. Rh1 $3 Rxh1 (2... Bxe5+ 3. Kg2 Rxh1 4. Kxh1 {And while black is up a piece, and can win all of white's pawns, this is a known drawn position since the white king cannot be ousted from the corner of the "wrong" bishop.}) 3....


Both are important but I believe tactics are more fundamental. That is, tactics can help to understand certain endgames but endgames aren't really going to help you understand tactics. Sure, there are isolated endgame positions where you might learn a tactical trick but how much of that is applicable to the rest of your game?


Two corrections are involved in the following very famous study. Its complete history, including how it was adapted from the conclusion of a game, are beyond the scope of this answer, but may be read on web pages from Wikipedia and the archive of Tim Krabbé's Open Chess Diary. When first published in study form, it was a draw-study as follows: [Title "G.E. ...


[TITLE "chess position from The Flanders Panel book"] [FEN "1nb5/pp1p4/PRP5/pR6/k1K1P3/2P5/2qP1P2/1NrnQB2 w - - 0 1"] For the retro logic in the "The Flanders Panel" to work, there are two assumptions required: (1) there were no promotions (2) the black queen was royal, i.e. could not have been left exposed to attack. The solvers also assume that it was ...

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