Wild card

Repost of 2019. Also somewhat related to Overall best challenge from 2017.

For a deserving challenge, answer, or user that isn't a good fit for any of the other categories.

@SilvioMayolo's answer to Distinguish English and Spanish with regular expressions

(Nominated by @Dingus)

The original 60 % accuracy threshold for this challenge turned out to be a little loose . . . and this was the astonishing one-byte answer that proved it.

My answer to Hexasweep (part 1): The Solver

(Self-nomination by @RedwolfPrograms)

I usually don't do much answering on this site, so I'm kind of proud of this one. I ended up spending a weekend (and a pad of isometric grid paper) on it, as it'd been unsolved for nearly four years.

Also, if anyone wants to try answering it themselves my solution is definitely far from optimal!

My series of 12 challenges to commemorate John Conway

(Self-nomination by @Bubbler)

From Wikipedia:

On 11 April 2020, at age 82, [John Conway] died of complications from COVID-19.

Conway was a truly brilliant mathematician. He made numerous contributions in so may fields of mathematics, so much that Wikipedia had to have a dedicated page for the list of things named after him. Among them were three Turing-complete esolangs, which gave me the idea to start this series of Conway-themed challenges on Code Golf.

While I had the list of Conway's achievements, it was definitely not easy to find suitable ideas for Code Golf challenges. Some were mathematically prohibitive, and some didn't have suitable input parameters. Also, I wanted to include challenge types other than plain code-golf, which made things even harder. Fortunately I could pull out two atomic-code-golfs and one fastest-code in the theme.

Wild card

Repost of 2019. Also somewhat related to Overall best challenge from 2017.

For a deserving challenge, answer, or user that isn't a good fit for any of the other categories.

@SilvioMayolo's answer to Distinguish English and Spanish with regular expressions

(Nominated by @Dingus)

The original 60 % accuracy threshold for this challenge turned out to be a little loose . . . and this was the astonishing one-byte answer that proved it.

My answer to Hexasweep (part 1): The Solver

(Self-nomination by @RedwolfPrograms)

I usually don't do much answering on this site, so I'm kind of proud of this one. I ended up spending a weekend (and a pad of isometric grid paper) on it, as it'd been unsolved for nearly four years.

Also, if anyone wants to try answering it themselves my solution is definitely far from optimal!

My series of 12 challenges to commemorate John Conway

(Self-nomination by @Bubbler)

From Wikipedia:

On 11 April 2020, at age 82, [John Conway] died of complications from COVID-19.

Conway was a truly brilliant mathematician. He made numerous contributions in so many fields of mathematics, so much that Wikipedia had to have a dedicated page for the list of things named after him. Among them were three Turing-complete esolangs, which gave me the idea to start this series of Conway-themed challenges on Code Golf.

While I had the list of Conway's achievements, it was definitely not easy to find suitable ideas for Code Golf challenges. Some were mathematically prohibitive, and some didn't have suitable input parameters. Also, I wanted to include challenge types other than plain code-golf, which made things even harder. Fortunately I could pull out two atomic-code-golfs and one fastest-code in the theme.

Wild card

Repost of 2019. Also somewhat related to Overall best challenge from 2017.

For a deserving challenge, answer, or user that isn't a good fit for any of the other categories.

@SilvioMayolo's answer to Distinguish English and Spanish with regular expressions

(Nominated by @Dingus)

The original 60 % accuracy threshold for this challenge turned out to be a little loose . . . and this was the astonishing one-byte answer that proved it.

My answer to Hexasweep (part 1): The Solver

(Self-nomination by @RedwolfPrograms)

I usually don't do much answering on this site, so I'm kind of proud of this one. I ended up spending a weekend (and a pad of isometric grid paper) on it, as it'd been unsolved for nearly four years.

Also, if anyone wants to try answering it themselves my solution is definitely far from optimal!

Wild card

Repost of 2019. Also somewhat related to Overall best challenge from 2017.

For a deserving challenge, answer, or user that isn't a good fit for any of the other categories.

@SilvioMayolo's answer to Distinguish English and Spanish with regular expressions

(Nominated by @Dingus)

The original 60 % accuracy threshold for this challenge turned out to be a little loose . . . and this was the astonishing one-byte answer that proved it.

My answer to Hexasweep (part 1): The Solver

(Self-nomination by @RedwolfPrograms)

I usually don't do much answering on this site, so I'm kind of proud of this one. I ended up spending a weekend (and a pad of isometric grid paper) on it, as it'd been unsolved for nearly four years.

Also, if anyone wants to try answering it themselves my solution is definitely far from optimal!

My series of 12 challenges to commemorate John Conway

(Self-nomination by @Bubbler)

From Wikipedia:

On 11 April 2020, at age 82, [John Conway] died of complications from COVID-19.

Conway was a truly brilliant mathematician. He made numerous contributions in so may fields of mathematics, so much that Wikipedia had to have a dedicated page for the list of things named after him. Among them were three Turing-complete esolangs, which gave me the idea to start this series of Conway-themed challenges on Code Golf.

While I had the list of Conway's achievements, it was definitely not easy to find suitable ideas for Code Golf challenges. Some were mathematically prohibitive, and some didn't have suitable input parameters. Also, I wanted to include challenge types other than plain code-golf, which made things even harder. Fortunately I could pull out two atomic-code-golfs and one fastest-code in the theme.

Wild card

Repost of 2019. Also somewhat related to Overall best challenge from 2017.

For a deserving challenge, answer, or user that isn't a good fit for any of the other categories.

@SilvioMayolo's answer to Distinguish English and Spanish with regular expressions

(Nominated by @Dingus)

The original 60 % accuracy threshold for this challenge turned out to be a little loose . . . and this was the astonishing one-byte answer that proved it.

My 8 answer cop-cracking tennis match with HighlyRadioactive - Print X without X

(self nomination by Lyxal)

This was a fun little exchange of cop and robber answers for which HighlyRadioactive provided cop answers in ><> and which I promptly cracked. The irony about this chain is that the intended answers were much shorter than what I came up with. I don't think anyone else engaged in such a long challenge chain.

Wild card

Repost of 2019. Also somewhat related to Overall best challenge from 2017.

For a deserving challenge, answer, or user that isn't a good fit for any of the other categories.

@SilvioMayolo's answer to Distinguish English and Spanish with regular expressions

(Nominated by @Dingus)

The original 60 % accuracy threshold for this challenge turned out to be a little loose . . . and this was the astonishing one-byte answer that proved it.

My answer to Hexasweep (part 1): The Solver

(Self-nomination by @RedwolfPrograms)

I usually don't do much answering on this site, so I'm kind of proud of this one. I ended up spending a weekend (and a pad of isometric grid paper) on it, as it'd been unsolved for nearly four years.

Also, if anyone wants to try answering it themselves my solution is definitely far from optimal!