Well guys, to explain my point a bit better I bring you this example:
http://es.lichess.org/training/55237
This problem was categorized as hard not long ago. The fact of the matter is that it's been played more than 40.000 times, and due to multi-accounters and anonymous players that learnt it and memorized it, its score has decreased significantly.
We need the computer to select puzzles that are less voted so they are played from time to time and this stops happening.
http://es.lichess.org/training/55237
This problem was categorized as hard not long ago. The fact of the matter is that it's been played more than 40.000 times, and due to multi-accounters and anonymous players that learnt it and memorized it, its score has decreased significantly.
We need the computer to select puzzles that are less voted so they are played from time to time and this stops happening.