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Regarding the lag on a single-core processor.
It turns out that the problem isn't the processor itself, but the operating system. On the same machine with a single-core processor, the mini-map doesn't lag in Windows Vista and Windows 7, but it does lag in Windows XP SP2. The most interesting thing is that even on Windows XP SP2, the lag disappears if you listen to music while playing (open WinAmp, etc.). Perhaps this problem has been fixed in the third service pack.
If there are no more ideas regarding the TE version, then we can start a mini-tournament on version 1.03. A one-month deadline for the tournament is too long. I don't want to play on other resources. It would be possible to hold tournaments more often if you have the time and desire. Those who don't play within two weeks won't play within a month either. The number of players (at least per game) doesn't depend on the time allotted for the tournament: you can count them on your fingers, and the nicknames are always the same in the final tables. If there isn't enough time, at least the deadline could be shortened. Ideally, a player needs two to three evenings for one tournament. And a week to gather their courage. But waiting half a month for the results is not pleasant for many. Moreover, by the end of the deadline, you already forget that you participated in the tournament. Accordingly, the interest in the results is no longer the same.