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SSCAIT 2018 round robin is nearly over

It looks as though SAIDA and Locutus will tie for #1-#2 in this SSCAIT. SAIDA has suffered 6 losses, as few as any bot, and it has played all games so nobody can pass it. Locutus is the only other player with 6 losses, and its remaining 3 games are against weaker opponents, so it will probably finish without another loss.

Locutus scored 2-0 against SAIDA, so I’m guessing that Locutus will be assigned #1 for pairing purposes. If the same pairing system is used as last year, #1 will be paired against #16 in the round of 16, #2 against #15, and so on. The exact pairings make a big difference in a knockout tournament.

With few games left to play, places #15-#16 are likely to be a tie between Arrakhammer and XIMP by Tomas Vajda, both with 44 losses. There is a small chance that one of them might lose and bring about a tie for place #16.

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Bruce on :

This year ties are being broken by ELO rating at the start if the tournament instead of performance during the tournament (per a FB post by Certicky). Although it does seem a bit strange in cases where the lower-ranked bot won both games, I do like the fact that this provides a bit of encouragement for people to submit their bots earlier and maybe boost the level of play a bit in the general SSCAIT competition prior to the tournament.

Ecgberht on :

This year the rules for ties changed and now Its actually the ELO the bots had before the round robin started the metric used to decide the assignings.

Based on this new rule SAIDA will be #1 because It had more ELO than Locutus prior the round robin started.

MicroDK on :

this is what Certicky wrote on the Facebook page:
https://www.facebook.com/groups/bwapi/

Hi everyone!
I have some SSCAIT 2018/19 related news and dates. The format for the tournament phase will be very similar to last year's with only a few minor changes. There will be two rounds:

(1) Round-robin (RR) with two games per each bot pair. There's one point for each win & draws aren't possible. 16 non-random bots with most points proceed to elimination bracket (random bots can’t proceed). Score ties in RR are broken based on ladder ELO (source: http://cachedsscaitscores.krasi0.com/eloRatings/). The match voting will be disabled in advance to keep the ELO fair. New bots with no ELO value will be assigned the lowest value in the list (this discourages last-day submissions). In case of equal ELO, ties are broken by mutual RR match result. If even that doesn’t help, we run an additional Bo1 decider match.

(2) Elimination bracket of 16 best bots from round-robin. We'll have a double-elimination bracket with Bo5 for all matches except the grand finals - that will be Bo7. The bracket pairings will be based on the RR placement. The 1st round will look like this: 1-16, 8-9, 4-13, 5-12, 2-15, 7-10, 3-14, 6-11. The elimination bracket games will not be visible to the public until we release the videos.

We will not delete the bot’s I/O files at any point during the tournament. Whatever a bot learns during the RR will be available in the elimination phase as well. Other than that, the usual rules described at https://sscaitournament.com/index.php?action=rules apply.

Schedule: The submissions will be closed on 20th of December, 23:59:59 CET. This doesn't mean that we'll start the round-robin right away. After we close the submissions, we'll need a day or two for preparations, filtering out the bots that don’t qualify for some reason (for example “clone” bots), etc.

Jay Scott on :

Ah, several days are not long enough for elo without voting to stabilize for fairness, but whatever. It’s not a bad idea. The details of tiebreaks matter, but the details of tiebreaking rules are not as important.

Jay Scott on :

To me it does seem poor practice to announce details on a platform that is in the news for bad practices, especially one which some people actively avoid. But it seems nearly universal.

Anon on :

M. Certicky announced about
Tie break rule :
#1 Frozen ELO score
#2 Mutual RR result
#3 1 more match
SAIDA is higher ELO than Locutus, so RR #1 is SAIDA.

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