About chess lessons for intermediate results of 10,000
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00:55
05:12
03:13
02:49
06:31
04:08
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13:17
13:08
10:36
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03:39
05:17
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06:50
01:31
02:00
04:24
11:44
03:17
12:46
01:12
08:06
11:08
61:08
00:44
01:58
20:56
02:16
01:36
04:59
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04:09
03:46
03:21
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09:30
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