KAN's blog

Codeforces Blitz Cup 2025
By KAN, 19 months ago, In English

Hi Codeforces!

As announced earlier, we’re holding an individual competition, the Codeforces Blitz Cup 2025, to celebrate 15 years of Codeforces. The tournament features PvP matches in a novel Blitz format, where every second (literally!) counts. In a 40-minute match, the opponents rush to solve each consecutive problem quicker than the rival. One needs to come up with a correct solution, think over the optimal implementation, and code cleanly: only the first one to get a problem correctly claims the points.

Complete Blitz rules

We’ve selected 64 strong participants who compete against each other in a single-elimination bracket. The first round has just concluded, and we’ve already seen both head-to-head battles and incredible comebacks. You can see some of the exciting screencasts of Round 1 in the streams section. Complete results (also shown below).

Results of Round 1

Starting today until Friday, Round 2 matches are held. Here’s the lineup:

We will stream featured matches of Round 2, and we encourage the participants to stream on their own. We’ll update the lineup above with the start time of the matches, so you can come and cheer!

On the weekend, March 8th and 9th, we’ll stream top 15 matches of the Blitz Cup. The streams will feature both opponents coding side by side, as well as commentary and discussion. Find the schedule of the final matches here and stay tuned in the streams section!

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Comments Comments (33)
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19 months ago, hide # |
 
Vote: I like it +151 Vote: I do not like it

Wow, can't wait to see when tourist and conqueror_of_tourist meet one another in a Blitz round.

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19 months ago, hide # |
 
Vote: I like it +20 Vote: I do not like it

The type of game is very interesting. I like it very much.

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    19 months ago, hide # ^ |
     
    Vote: I like it +24 Vote: I do not like it

    I would say lockout was more interesting , in this one you are just trying to get AC as fast as possible. But they did a lockout tournament in the past so ig it is ok.

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19 months ago, hide # |
 
Vote: I like it +17 Vote: I do not like it

I'd like to see jiangly vs tourist in a Blitz round.That will be a wonderful game!

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19 months ago, hide # |
 
Vote: I like it +18 Vote: I do not like it

Each match lasts 40 minutes, with 7 problems of increasing difficulty (worth 2, 3, 4, 6, 8, 10, and 12 points).

Is this a typo for 1, 2, 4, 6, 8, 10, and 12 points? I only see 1, 2, 4, ... points on the score tables.

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19 months ago, hide # |
 
Vote: I like it +5 Vote: I do not like it

Will the blitz game be released publicly to codeforces users at any time?

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    19 months ago, hide # ^ |
     
    Vote: I like it 0 Vote: I do not like it

    I don't think that's possible since the old problems are used. And with the huge amount of low-rated users, there's no way to ensure the fairness (ie: make sure they don't violate the rule).

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19 months ago, hide # |
 
Vote: I like it +152 Vote: I do not like it

Justice for oursaco

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19 months ago, hide # |
 
Vote: I like it +19 Vote: I do not like it

Please make this blitz format a common thing. Would love it if Codeforces became like Lichess

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19 months ago, hide # |
 
Vote: I like it +39 Vote: I do not like it

In the competition, either my brain is too fast for my hands, or my hands are too fast for my brain—either way, they refuse to sync up!

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19 months ago, hide # |
 
Vote: I like it +119 Vote: I do not like it

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19 months ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

Will this concept be available for common use soon or later? or is it already available? I really would like to choose some problems and compete against my friends. If I can already do that can someone explain how to do it.

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19 months ago, hide # |
 
Vote: I like it +41 Vote: I do not like it

faker vs Bin

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19 months ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

Can`t wait

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19 months ago, hide # |
 
Vote: I like it -21 Vote: I do not like it

Where is dominator69

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19 months ago, hide # |
 
Vote: I like it +11 Vote: I do not like it

can we know the problem after the contest end?

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19 months ago, hide # |
 
Vote: I like it +18 Vote: I do not like it

why no stream for the errorgorn vs lexiyvv match :(

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19 months ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

We want Tourist vs conqueror_of_tourist :)

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19 months ago, hide # |
← Rev. 2  
Vote: I like it +16 Vote: I do not like it

Really want to see that if conqueror_of_tourist can conquer tourist!

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19 months ago, hide # |
 
Vote: I like it +25 Vote: I do not like it

Wow, tourist lost a round to golomb due to int overflow, I guess it happens even to the best of us

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19 months ago, hide # |
 
Vote: I like it +39 Vote: I do not like it

I'm thinking about the cool feature of this individual competition.

Can it somehow be made as a seperate function in Codeforces where we can compete with random users or chosen ones (Ex: friends, teachers,...)

But I cannot figure out how to ensure the fairness of each contestant (especially with random users)

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    19 months ago, hide # ^ |
     
    Vote: I like it +14 Vote: I do not like it

    That sounds great

    You don't really need to ensure fairness because you won't really do Blitz with random people

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19 months ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

Should there be a lower bracket? It means the 2nd chance for the under-performed times or some unlucky seeding (esp for whom got seed to 1v1 the literally champion).

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8 months ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

Will we have a blitz cup this year as well ??

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6 months ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

Hey KAN, Is there a way to make CF Blitz style contest in mashup/GYM ?

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