@PaTrIpErO Please don't make puzzles only +1/-1. I am a very poor player!!! I like to play the puzzles when I watch TV so I don't spend a lot of time on each one nor a lot of effort.
Anyway, I have a suggestion. There are a plethora of pgn games out there. It's really interesting (for me) to go to "Tools" -> "Import Game" and paste something like:
[Event "Hoogovens"]
[Site "?"]
[Date "1999.01.20"]
[Round "?"]
[White "Kasparov, Garry"]
[Black "Topalov, Veselin"]
[ECO "B07"]
[WhiteElo "2812"]
[BlackElo "2700"]
[Result "1-0"]
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 Bg7 5. Qd2 c6 6. f3 b5 7. Nge2 Nbd7 8. Bh6 Bxh6 9. Qxh6 Bb7 10. a3 e5 11. O-O-O Qe7 12. Kb1 a6 13. Nc1 O-O-O 14. Nb3 exd4 15. Rxd4 c5 16. Rd1 Nb6 17. g3 Kb8 18. Na5 Ba8 19. Bh3 d5 20. Qf4+ Ka7 21. Rhe1 d4 22. Nd5 Nbxd5 23. exd5 Qd6 24. Rxd4 cxd4 25. Re7+ Kb6 26. Qxd4+ Kxa5 27. b4+ Ka4 28. Qc3 Qxd5 29. Ra7 Bb7 30. Rxb7 Qc4 31. Qxf6 Kxa3 32. Qxa6+ Kxb4 33. c3+ Kxc3 34. Qa1+ Kd2 35. Qb2+ Kd1 36. Bf1 Rd2 37. Rd7 Rxd7 38. Bxc4 bxc4 39. Qxh8 Rd3 40. Qa8 c3 41. Qa4+ Ke1 42. f4 f5 43. Kc1 Rd2 44. Qa7
Click the "Menu" below the Moves on the right and then click "Fast."
It's most likely that all the famous pgn games out there would be a sizable amount of data. Boris Spassky is my favorite player and when you download his pgn file for all games recorded in it, it is 1.4 MB extracted.
But if the size of the data of all the famous pgn files isn't a considerable issue, they could be systematically stored in a database because the format is somewhat consistent.
The inconsistencies between different pgns are only relevant in the header. The names may be stored differently (i.e [White "Spassky B V"] vs [White "Boris Spassky"]). If it's possible to find someone that has created all games with a really consistent format (including accurate dates) then it would be fairly easy to parse them into a format and load them in a database.
On the site, the headers of those games could be loaded in a grid view that you could filter and/or search on. You could click Play or Open and lo and behold - you can watch any famous game instantly.
It's just an idea. Lichess is certainly one of the greatest sites I've ever seen and most DEFINITELY the greatest chess site ever! I just learned about it a few months ago when I picked up chess again.
Cheers!
Anyway, I have a suggestion. There are a plethora of pgn games out there. It's really interesting (for me) to go to "Tools" -> "Import Game" and paste something like:
[Event "Hoogovens"]
[Site "?"]
[Date "1999.01.20"]
[Round "?"]
[White "Kasparov, Garry"]
[Black "Topalov, Veselin"]
[ECO "B07"]
[WhiteElo "2812"]
[BlackElo "2700"]
[Result "1-0"]
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 Bg7 5. Qd2 c6 6. f3 b5 7. Nge2 Nbd7 8. Bh6 Bxh6 9. Qxh6 Bb7 10. a3 e5 11. O-O-O Qe7 12. Kb1 a6 13. Nc1 O-O-O 14. Nb3 exd4 15. Rxd4 c5 16. Rd1 Nb6 17. g3 Kb8 18. Na5 Ba8 19. Bh3 d5 20. Qf4+ Ka7 21. Rhe1 d4 22. Nd5 Nbxd5 23. exd5 Qd6 24. Rxd4 cxd4 25. Re7+ Kb6 26. Qxd4+ Kxa5 27. b4+ Ka4 28. Qc3 Qxd5 29. Ra7 Bb7 30. Rxb7 Qc4 31. Qxf6 Kxa3 32. Qxa6+ Kxb4 33. c3+ Kxc3 34. Qa1+ Kd2 35. Qb2+ Kd1 36. Bf1 Rd2 37. Rd7 Rxd7 38. Bxc4 bxc4 39. Qxh8 Rd3 40. Qa8 c3 41. Qa4+ Ke1 42. f4 f5 43. Kc1 Rd2 44. Qa7
Click the "Menu" below the Moves on the right and then click "Fast."
It's most likely that all the famous pgn games out there would be a sizable amount of data. Boris Spassky is my favorite player and when you download his pgn file for all games recorded in it, it is 1.4 MB extracted.
But if the size of the data of all the famous pgn files isn't a considerable issue, they could be systematically stored in a database because the format is somewhat consistent.
The inconsistencies between different pgns are only relevant in the header. The names may be stored differently (i.e [White "Spassky B V"] vs [White "Boris Spassky"]). If it's possible to find someone that has created all games with a really consistent format (including accurate dates) then it would be fairly easy to parse them into a format and load them in a database.
On the site, the headers of those games could be loaded in a grid view that you could filter and/or search on. You could click Play or Open and lo and behold - you can watch any famous game instantly.
It's just an idea. Lichess is certainly one of the greatest sites I've ever seen and most DEFINITELY the greatest chess site ever! I just learned about it a few months ago when I picked up chess again.
Cheers!