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Martin B. Justesen

@saychess.bsky.social
663 followers 201 following 171 posts

Writes about chess at saychess.substack.com

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Reposted by Martin B. Justesen
Peter Doggers @peterdoggers.bsky.social · 13/10/2025
I felt it was time for a new experiment. Introducing CHESSVIBES WEEKLY, a new podcast that covers the latest chess news. Hope you like it! (And hopefully soon on Apple and Spotify as well.) A retweet would be appreciated... Spread the word! www.buzzsprout.com/2546567/epis...
buzzsprout.com
ChessVibes Weekly
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Martin B. Justesen @saychess.bsky.social · 24/09/2025
23 rapid games 😳
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Martin B. Justesen @saychess.bsky.social · 14/09/2025
9 years ago today 💂
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Martin B. Justesen @saychess.bsky.social · 14/09/2025
Impressive!
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Martin B. Justesen @saychess.bsky.social · 14/09/2025
Nice! How old is your opponent though? 😯
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Martin B. Justesen @saychess.bsky.social · 14/09/2025
My knowledge is not up to date 😄
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Martin B. Justesen @saychess.bsky.social · 14/09/2025
🤔
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Martin B. Justesen @saychess.bsky.social · 13/02/2025
saychess.substack.com/p/part-ii-of...
saychess.substack.com
Part II of Mapping Checkmate Patterns with a 27-Dimensional Fingerprint
Last week I posted a try to find and organize checkmate patterns using a clustering algorithm combined with a focused look on the 3x3 squares around the checkmated King.
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Martin B. Justesen @saychess.bsky.social · 12/02/2025
Made a real breakthrough in my efforts to cluster checkmate patterns 🙌🏻
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Martin B. Justesen @saychess.bsky.social · 10/02/2025
Just an idea for FIDE, since they own the world and chess..
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Martin B. Justesen @saychess.bsky.social · 10/02/2025
There would only be the void if not for FIDE
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Martin B. Justesen @saychess.bsky.social · 08/02/2025
What do you mean about stalemates? I have only looked at checkmate positions from the puzzle database, so these are not in the data
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Martin B. Justesen @saychess.bsky.social · 08/02/2025
Thanks! Yes, the corner is a 2x2 if you remove the out of board area. I think some patterns are mirror images of each other, but not completely sure yet, so have to investigate it
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Martin B. Justesen @saychess.bsky.social · 08/02/2025
Ah yes, makes sense to avoid a pawn and a bishop to equal a knight etc.! Will make this improvement, thanks 🙏🏻
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Martin B. Justesen @saychess.bsky.social · 08/02/2025
Playing 27D-chess 🫨 open.substack.com/pub/saychess...
open.substack.com
Mapping Checkmate Patterns with a 27-Dimensional Fingerprint
Some days ago, I read in a blog post on Lichess that the kill box checkmate pattern had been added as a puzzle keyword.
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Martin B. Justesen @saychess.bsky.social · 30/01/2025
Both currently
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Martin B. Justesen @saychess.bsky.social · 30/01/2025
That’s what I’m missing then 😄
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Martin B. Justesen @saychess.bsky.social · 30/01/2025
What is your secret 👀
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Martin B. Justesen @saychess.bsky.social · 29/01/2025
Nice!
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Martin B. Justesen @saychess.bsky.social · 27/01/2025
youtube.com/shorts/3_pQQ... They walked away as legends..
youtube.com
3 DAYS of Tennis Madness! The Longest Match Ever! 🎾⏳#shorts #tennis
YouTube video by Sports Facts
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Martin B. Justesen @saychess.bsky.social · 26/01/2025
It now runs using this db instead of stockfish, which is quite an improvement
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Martin B. Justesen @saychess.bsky.social · 26/01/2025
Will try to implement this, thanks!
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Martin B. Justesen @saychess.bsky.social · 25/01/2025
Looks interesting! Then I could save a lot of engine time
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Martin B. Justesen @saychess.bsky.social · 25/01/2025
And how would you define repertoire coverage?
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Martin B. Justesen @saychess.bsky.social · 25/01/2025
Sure! I have used python and created the code using Replit.com I used the lichess api to connect to the opening database and retrieve stats. It takes about 2-3 hours to generate 20 lines due to analysing 1 position leads to retrieval of data and getting evals on all the moves played more than 5%
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Martin B. Justesen @saychess.bsky.social · 25/01/2025
Worked on a new way to make opening files based on Lichess data open.substack.com/pub/saychess...
open.substack.com
Building a Data-Driven Chess Opening Repertoire + FREE TEST REPERTOIRE AGAINST 1. e4
Today, we'll explore a new approach that combines database statistics and engine evaluation to build an opening repertoire.
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Martin B. Justesen @saychess.bsky.social · 20/01/2025
100 positions you need to avoid
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Martin B. Justesen @saychess.bsky.social · 20/01/2025
Premoved and lost my Queen in 3+0… won anyway 😆
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Martin B. Justesen @saychess.bsky.social · 12/01/2025
Nice! Good luck :)
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Martin B. Justesen @saychess.bsky.social · 12/01/2025
You are a serious adult improver when you have a team of coaches spearheaded by a head coach 😅
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Martin B. Justesen @saychess.bsky.social · 12/01/2025
It does seem like Chessable hasn’t evolved much. I just don’t understand why its not possible to combine user games with bought repertoires better in regards to stats and mistakes
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Martin B. Justesen @saychess.bsky.social · 11/01/2025
I’m a little active on discord.gg/P62r9twm but must admit discord is not my strong suit
discord.gg
Slut dig til The Chess Gym Discord-serveren!
Tjek The Chess Gym community’et ud på Discord - hæng ud med 178 andre medlemmer, og nyd gratis stemme- og tekstchat.
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Martin B. Justesen @saychess.bsky.social · 11/01/2025
discord.gg/amQ4b4cn there actually already is one, but not sure how active is
discord.gg
Slut dig til ChessPunks Discord-serveren!
Tjek ChessPunks community’et ud på Discord - hæng ud med 353 andre medlemmer, og nyd gratis stemme- og tekstchat.
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Martin B. Justesen @saychess.bsky.social · 10/01/2025
Looking forward to getting this!
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Martin B. Justesen @saychess.bsky.social · 06/01/2025
I also have a hard time wrapping my head around the logic behind the decision. Definitely wrong way to add value to their pro membership
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Martin B. Justesen @saychess.bsky.social · 04/01/2025
Seems like a small revolt is happening in the Chessable forums 😳
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Martin B. Justesen @saychess.bsky.social · 03/01/2025
Jeans, Foucault, FIDE and Freestyle chess all in one newsletter! open.substack.com/pub/saychess...
open.substack.com
Who Wears the Trousers in the Chess World?
Magnus Carlsen’s recent actions at the World Rapid and Blitz Chess Championships were not just controversial but a significant rebellion against FIDE.
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Martin B. Justesen @saychess.bsky.social · 03/01/2025
True, but I guess online platforms more quickly can change the product or paywall larger parts of it
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Martin B. Justesen @saychess.bsky.social · 02/01/2025
Learned a new word today..
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Martin B. Justesen @saychess.bsky.social · 02/01/2025
Won this game due to pure despite of my own play
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Martin B. Justesen @saychess.bsky.social · 02/01/2025
It seems like there is some disconnect between reality and their plan to make freestyle chess popular
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Martin B. Justesen @saychess.bsky.social · 02/01/2025
*Wants to play freestyle chess to avoid doing any preparation
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Martin B. Justesen @saychess.bsky.social · 01/01/2025
Okay, I just remembered it as being framed very positively. But yes, having the rules in place makes it more legitimate
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Martin B. Justesen @saychess.bsky.social · 01/01/2025
youtube.com/shorts/skxtO... When they had the rules in place beforehand it was seen as a great sporting event
youtube.com
CAN WE HAVE TWO GOLDS? 🥇🥇 #shorts
YouTube video by Olympics
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Martin B. Justesen @saychess.bsky.social · 01/01/2025
It makes it look like a New Year’s party or something was more important. Or it was just to make FIDE look stupid again
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Martin B. Justesen @saychess.bsky.social · 01/01/2025
Magnus Carlsen and Ian Nepomniachtchi Crowned Co-Champions After Agreeing Chess Is ‘Actually Kinda Boring’
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Martin B. Justesen @saychess.bsky.social · 30/12/2024
Planning to do something similar with the 15+10 games. Played the first one today
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Martin B. Justesen @saychess.bsky.social · 30/12/2024
skak.dk/images/skakb...
skak.dk
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Martin B. Justesen @saychess.bsky.social · 30/12/2024
Found an interesting Larsen article on the Russian chess school. Have you read it?
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Martin B. Justesen @saychess.bsky.social · 30/12/2024
Or maybe just the same jeans to make a point
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