puzzle number 6
35 minutes ago
|Haria -- Wang, High Wycombe Open|
|Ibrahimova -- Leolko, Moscow Open|
|Moreno Carretaro -- Perez Manas, Catalan Team Championship|
|Vuckovic -- Fedorovsky, European Individual Championship|
|Pokhlebin -- Kalinin, Moscow Championship|
|Screenshot of CI 112 Combinations|
|Solving Screen in Chess Informant Expert|
|After 23...Rxb2 Draw agreed|
|Black gave up|
|Highest:||2400 (11 Jun 09)|
|Lowest:||1444 (28 Jul 08)|
|Total Time:||33.3 hrs|
[R]esearch by Chase and Ericsson (1982) on the effects of practice on a specific task measuring the capacity of STM [short-term memory] has shown that through extended practice (more than 200 hours), it is possible for subjects to improve performance by more than 1,000%.
K. Anders Ericsson and Neil Charness, “Expert Performance” (1994), 735.
[Sarratt] introduced his generation to the work of the older masters, Damiano, Lopez, and Salvio, in a series of translations. That, as we now know to be the case, these translations were careless, inaccurate, and incomplete, did not rob them of their value at the time they were made, though this discovery has had a very damaging effect on his reputation as a writer. It is unfortunate that the badness of this portion of Sarratt's literary work should have prevented his successors from recognizing the importance and real merit of his other services to chess.Among Sarratt's contributions cited by Murray was his advocacy that stalemate should be a draw. Through this advocacy, the London Chess Club adopted a rule that was already standard in other countries.
Murray, A History of Chess, 874.
Beyond the mode in which this collection of End Studies is presented to players, little originality is claimed by the compiler, as most of the positions are found in larger works on the royal game.He acknowledges two major sources: Stratégie Raisonnée des Fins de Partie du Jeu d'Echecs by Philippe Ambroise Durand and Jean Louis Preti, and Theorie und Praxis der Endspiele by Johann Berger. These texts as well as Blake's are available as free ebooks through Google Books, as well as in various print editions through a range of outlets.
3. Complete my Pawn Endgame flash card project.I selected one card at random, and it was sufficient to keep me busy for over an hour. First I set up the position on a chess board. Then, without moving any pieces I recorded observations and variations in a notebook. Finding a critical position that required more thought, I moved the pieces to it and recorded more. There were a few false starts, but I thought that I had worked out the main lines. Without leaving the table, I set up the initial position in tChess Pro on the iPad and played against the computer at full strength (est. Elo 2500). Success. I tried against a stronger engine on the iPad: Shredder (est. Elo 2600) with more success. Then, I set up the position on my notebook computer and played against Rybka 4. I wrote about the exercise in "Opposition and Outflanking."
Two years ago, I created cards that contain all the blue diagrams of the first chapter in Mark Dvoretsky, Dvoretsky's Endgame Manual. I review these cards regularly--they contain no answers--with the intention of being able to know in an instant when looking at each how the position should be played. See the last paragraph of "GM-RAM: Essential Knowledge."
See "New Year's Resolutions"
1382 puzzles: 10858/13820 points 78%In addition, I solved the first 30 exercises that are part of the Chess-wise iPad app. It comes with 300 exercises. No timer, no points. Realistic positions that might occur in play. Add the dozen I worked on in Alburt's text, and that's more than 90 problems the past week.
last 10 puzzles: 87/100 87%
|Endgame article by Jan Drtina|
"Tady to sice neni oposice (Here it is not opposition) ... 1.Ke6 neb i odtud dosahne kritickeho pole d7 a tu je jeste jedna take-take-oposice (1.Ke6 because thence to a critical field d7 and there is still a take-take-opposition)."Taking the opposition is insufficient to win, one must seize a critical square. There is some indication in a few things that I have read that the theory of critical squares was developed by Jan Drtina independently of Abbé Philippe Ambroise Durand, Stratégie Raisonnée Des Fins de Partie Du Jeu D'Échecs (1871)--half a century earlier (see discussion at chessgames.com by Gypsy). Such work adds fundamentally to Berger's discussion of the opposition.
Drtina, "Theorie pĕšee proti králi," 137.
|White on move wins|
|The player with the move wins|
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