Examples
Richard RétiOstrauer Morgenzeitung, Dec. 4th 1921
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The first study, by Richard Réti, is one of the most famous of all time. It is White to play and draw (see Réti endgame study). At first sight, this seems an impossible task: if White tries to chase after Black's pawn he can never catch it (1. Kh7 h4 2.Kh6 h3 etc. is clearly hopeless), while it is clear that Black will simply take White's pawn if he tries to promote it.
White can draw however, by taking advantage of the fact that the king can move in two directions at once: towards Black's pawn and towards White's own. The solution is 1.Kg7! h4 (1...Kb6 2. Kf6! h4 3.Ke5! transposes) 2.Kf6! Kb6 (if 2...h3, then 3.Ke6 h2 4.c7 Kb7 5.Kd7 allows white to promote his pawn) 3.Ke5! Now, if 3...Kxc6, then 4.Kf4 stops Black's pawn after all, while if 3...h3 4.Kd6 allows White to promote his pawn. Either way, the result is a draw. (Also see King and pawn versus king endgame, the section Rule of the square.)
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Not all studies are as simple as the above Réti example. The study to the right is by Kasparyan (first published in Magyar Sakkélet, 1962). White is to play and draw. The main line of the solution is 1.Ra1 a2 2.Ke6 Ba3 3.Bf4 Bb2 4.Be5 a3 5.Kd5 Bg6 6.Bd4 Bf7+ 7.Ke4 Bc4 8.Rg1, but there are various alternatives for both sides. For example, White could try 1.Bf4 on one's first move, with the idea 1...Bxa2 2.Bxd6 and 3.Bxa3 is a draw, but Black can defeat this idea with 1...Bxf4 2.Rxa3 Bc2, which wins. To understand why one move works and another one does not requires quite advanced chess knowledge. Indeed, it will not be obvious to many players that the position at the end of the given line (see the diagram below on the right) is a draw at all.
Another study is shown at the Alexey Troitsky article. For what is sometimes reckoned to be the most famous study of all, see Saavedra position.
Read more about this topic: Endgame Study
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