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CoG 2020 - race balance

I parsed the tournament manager’s detailed results log (text file of 5601 lines for 5600 games plus one header line) from CoG 2020 with my own software. Here is a crosstable which exactly matches the official results.

overallStarPurpBanaBetaMicrXIAOMcRaMeta
Stardust1223/1396
87.61%
171/199
86%
126/199
63%
153/200
76%
193/200
96%
190/200
95%
193/200
96%
197/198
99%
PurpleWave990/1398
70.82%
28/199
14%
83/200
42%
140/200
70%
168/200
84%
199/200
100%
177/200
88%
195/199
98%
BananaBrain971/1393
69.71%
73/199
37%
117/200
58%
134/200
67%
148/200
74%
195/200
98%
128/200
64%
176/194
91%
BetaStar718/1388
51.73%
47/200
24%
60/200
30%
66/200
33%
142/200
71%
93/200
46%
141/200
70%
169/188
90%
Microwave568/1400
40.57%
7/200
4%
32/200
16%
52/200
26%
58/200
29%
163/200
82%
83/200
42%
173/200
86%
XIAOYI512/1400
36.57%
10/200
5%
1/200
0%
5/200
2%
107/200
54%
37/200
18%
199/200
100%
153/200
76%
McRave443/1400
31.64%
7/200
4%
23/200
12%
72/200
36%
59/200
30%
117/200
58%
1/200
0%
164/200
82%
MetaBot152/1379
11.02%
1/198
1%
4/199
2%
18/194
9%
19/188
10%
27/200
14%
47/200
24%
36/200
18%

As usual, the results file is somehow different in every tournament. I got this table by excluding the 23 games in which the loser’s score is given as -1. 22 of these games are reported in the detailed results text file as NORMAL game end type, and in the HTML detailed results as NO_REPORT. It bothers me that the two sources do not match. The Starcraft AI Ladder documentation on game end states says “this could be caused by the Tournament Manager client crashing, or a network error, etc.” so it’s correct to exclude these games. The remaining game shows GAME_STATE_NEVER_DETECTED, where apparently neither side was able to start. The NO_REPORT results are not necessarily the fault of the bot, but in fact 2 of the games had Stardust as loser and the other 21 had MetaBot, so there is a strong correlation.

Here are the versus-race results. They are strongly skewed by protoss dominance, and of course there is only one terran participant. So these numbers are not much use.

botraceoverallvTvPvZ
Stardustprotoss87.61%95%81%96%
PurpleWaveprotoss70.82%100%56%86%
BananaBrainprotoss69.71%98%63%69%
BetaStarprotoss51.73%46%43%71%
Microwavezerg40.57%82%32%42%
XIAOYIterran36.57%-28%59%
McRavezerg31.64%0%32%58%
MetaBotprotoss11.02%24%5%16%

Next: Maps per player, in the same format as this post on AIIDE 2019. I need some updates to my software first.

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