lichess.org
Donate
Checkmate Against Stockfish Level 8

A New Beginning

Chess engineChessOff topic
I will no longer be using this account, but I will not delete it. I accomplished my last goal on this account. After months of trying, I finally beat Stockfish Level 8.

I copied and concatenated with minor edits my posts from the forum, and added a message at the end.

I FINALLY CHECKMATED STOCKFISH LEVEL 8!!!
After weeks of attempts at trying to beat Stockfish Level 8 by checkmate, with numerous prepared lines lasting more than 30 moves deep, I finally won. I won in a line that I had never seen before. It took me 731 games, excluding countless games where I used takebacks to erase the game from existence. The true number of attempts is probably more than a thousand.

https://lichess.org/FPhEqewB/white

And no, I didn't cheat. I used games in the Lichess database, which I have always used when playing Stockfish. Such games are available in all correspondence games, although when playing against Stockfish, you can individually examine a game.
Also, the CAPTCHA for my post was pretty funny.
https://lichess.org/BcnGtNyR#8

It's finally over.

After running a computer analysis on the game, the engine can't even figure out where it went wrong. It reports 0 inaccuracies, 0 mistakes, 0 blunders, 18 ACPL, and 96% Accuracy for me, and 0 inaccuracies, 0 mistakes, 0 blunders, 23 ACPL, and 93% Accuracy for Stockfish Level 8. I completely broke it.

I then ran a full server-side analysis on the game. This was a much deeper analysis than a simple computer analysis. It reported 0 inaccuracies, 0 mistakes, 0 blunders, 8 ACPL, and 98% Accuracy for me, and 1 inaccuracy, 0 mistakes, 0 blunders, 11 ACPL, 97% Accuracy for Stockfish Level 8. The one inaccuracy is 13...hxg5, where the engine recommends 13...Nh5 instead. However, that does not explain Stockfish Level 8's immediate total implosion.

I am not quitting chess. I am on the Chess Team at my college, and I still play chess. However, I am moving to a new account because...

I'm transgender.

My new full formal preferred name is Lillian Diana Fleming, but you can call me Lily. I use she/her pronouns. The first person I came out to was Mr. K., after my mental breakdown at the 2023 National High School Chess Championships. I came out to my parents later that night. A few months ago, after graduating high school, I decided I would come out to the rest of the Chess Club after I defeated Stockfish Level 8 in Correspondence.

I started using my new name and pronouns when I started attending college at Rose-Hulman Institute of Technology. I am in gender-inclusive housing, and I am wearing a skirt as i type this blog. I feel safe and loved at Rose-Hulman. My parents, my sister, and my professors, friends and classmates at college accept me.

My lichess username was concatenated from the school acronym and my preferred name at the time. Since I have a new preferred name, I will be using a new account that uses my preferred name. However, it would be absurd to delete this account and lose its countless studies and games, so I will keep it. Now that I have defeated Stockfish Level 8, I have accomplished the last goal that I hoped to accomplish on this account. I can now move on to a new account.

I hope to return to my high school and visit the chess club on Friday during my fall break, since I will not have school on October 5th and October 6th. If I visit, I will hopefully be wearing the outfit I am wearing right now, a shirt with my high school name and logo and a knee-length skirt.

Edit: I did that exactly as planned

Here's to a new beginning!