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A lot of lessons in the category "Rook and Other Endgames" are duplicates. That probably explains why there is 250 puzzles in that category, when it's probably around 50 being duplicated 5 time each.
For example the following are the same puzzle:
You can also see it for other puzzles if you start at the beggining of the category and you skip the lessons quickly, you'll notice a lot of puzzles are repeated.
Hey Silex777; I agree, some lessons are duplicated for retention purposeses; but not all are. In some problems, they want you to play white. Then the same position comes up later, and they want you to play black
Sam Loyd's puzzle
by BenGab a few minutes ago
Titled Player being a "Sore Loser"
by With_every_step 3 minutes ago
How many chess games are possible ?
by SilentKnighte5 5 minutes ago
Did I have a winning position ?
by Similaresoldofa 8 minutes ago
10/21/2016 - Marathon Mate
by human_robot 19 minutes ago
Are you afraid of trading pieces
by SilentKnighte5 22 minutes ago
School Chess Program proposal
by DaGrizz82 26 minutes ago
Express if you like or do not like the new version of the site
by DDD12 41 minutes ago
How many openings should be in a tournament chess player's repertoire and why?
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Weird opening ay..?
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