Summary of recent findings for optimal play in FM24 & FM26

by GeorgeFloydOverdosed, Oct 31, 2025

When are you exporting the fixture? You need to do it on this screen:

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I tried both on this screen and on the screen before that since when I export the fixture on this screen I cannot sim it with customized seeds (error saying that fixture data has changed - don't remember exact prompt off the top of my head).

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If you're using the command-line, tacking `--keep-build` on to the end of the sims should fix it; if you're using the UI then latest version of the app has a checkbox called "Skip rebuild" with this option already selected. Let me know if you're still having difficulty.

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Sure thing, will give you a feedback once I get home and give it a try. Also, I'd like to ask you kindly to make the harness tool compatible with 24.2.2 (pre off-license patch) which I'm using on a daily basis and updated to 24.2.4 just to test things out. I'll send you probe output later on.

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If I can downgrade to that version in Steam then I will try. If I can't, and the match engine is different in that version (I target 24.2.0.0, per the Game Status screen) then it'll be impossible to map it out.

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The match engine is the same as everything else. The only difference between versions is licensing or rather lack of it in the last version. They pushed this update once it was official that FM25 won't happen and some licesing deals signed just for 24 meet EOL and weren't renewed. You can downgrade using steam console and keeping manifast file from the newest version to prevent automatic updates. Bit of a hassle for you if you ask me, I thought you need only FM24.exe build timestamp which I can easily deliver.

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Well to make it launch I only need the build timestamp, but if they've changed stuff too then there might be more to it. Fingers and toes crossed.

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I'm currently running an experiment in which I take the top 32 goalkeepers and pit them against each other in a league/knockout to see who is the best in the game.

Group A

1208 wins - Alisson
1206 wins - Ivan Provedel
1205 wins - Gianluigi Donarumma
1123 wins - Dorde Petrovic

Group B

1256 wins - Gregor Kobel
1189 wins - Sinan Bolat
1169 wins - Keylor Navas
1128 wins - Alphonse Areola

Group C

1239 wins - Emiliano Martínez
1231 wins - Thibaut Courtois
1176 wins - André Onana
1115 wins - Daniel Peretz

Group D

1230 wins - Wojciech Szczęsny
1184 wins - Jeremías Ledesma
1168 wins - Jan Oblak
1164 wins - Uğurcan Çakır

Group E

1352 wins - David De Gea
1165 wins - Diogo Costa
1128 wins - Manuel Neuer
1110 wins - Dean Henderson

Group F

1270 wins - Marc-André ter Stegen
1255 wins - Guglielmo Vicario
1158 wins - Ederson
1124 wins - Weverton

Group G

1268 wins - Yann Sommer
1226 wins - David Raya
1140 wins - Aaron Ramsdale
1103 wins - Niklas Hedl

Group H

1255 wins - Esteban Andrada
1240 wins - Mike Maignan
1192 wins - Rui Patrício
1085 wins - Sean McDermott

Two identical teams play each other using Knap's 4-2-4 (with Haaland, Mbappe, Salah and Vini Jr. up front) with only the goalie swapped out. They play each other 500 times twice (home and away, just in case I haven't completely ruled out any bias). The top two from each group advance through and they play two a two-legged 16-team knockout. I'm stunned by how close Group A was. I might have to try another version in the future with the groups shuffled.

Also the reason I'm tracking wins and not goals conceded is because a) winning is all you care about when you build a team and b) goalkeepers can indirectly contribute goals and I didn't want to overlook that.

EDIT: league phase done.

Knockout seeds
  1. David De Gea: 1352 wins
  2. Marc-André ter Stegen: 1270 wins
  3. Yann Sommer: 1268 wins
  4. Gregor Kobel: 1256 wins
  5. Esteban Andrada: 1255 wins
  6. Emiliano Martínez: 1239 wins
  7. Wojciech Szczęsny: 1230 wins
  8. Alisson: 1208 wins
  9. Guglielmo Vicario: 1255 wins
  10. Mike Maignan: 1240 wins
  11. Thibaut Courtois: 1231 wins
  12. David Raya: 1226 wins
  13. Ivan Provedel: 1206 wins
  14. Keylor Navas: 1189 wins
  15. Jeremías Ledesma: 1184 wins
  16. Diogo Costa: 1165 wins

David de Gea vs Diogo Costa: 462-178-360
Alison vs Guglielmo Vicario: 420-208-372
Gregor Kobel vs Ivan Provedel: 407-207-386
Esteban Andrada vs David Raya: 380-206-414
Marc-André ter Stegen vs Jeremías Ledesma: 390-224-386
Wojciech Szczęsny vs Mike Maignan: 415-207-378
Yann Sommer vs Keylor Navas: 400-202-398
Emiliano Martínez vs Thibaut Courtois: 390-213-397

David De Gea vs Alisson: 403-212-385
Gregor Kobel vs David Raya: 392-204-404
Marc-André ter Stegen vs Wojciech Szczęsny: 404-216-380
Yann Sommer vs Thibaut Courtois: 404-198-398

David De Gea vs David Raya: 415-230-355
Marc-André ter Stegen vs Yann Sommer: 388-221-391

David De Gea vs Yann Sommer: 406-216-378

Well I don't think anybody saw this coming.

Were there flaws in this test? For sure. I should have maximised each players' familiarity with the tactics. I shouldn't have used an overpowered corner tactic. I should probably spend 64,000 matches on every goalie playing each other rather than a knockout tournament format, but we live and learn.

Still though. David de Gea. And it wasn't even close.

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LightningFlik said: If you're using the command-line, tacking `--keep-build` on to the end of the sims should fix it; if you're using the UI then latest version of the app has a checkbox called "Skip rebuild" with this option already selected. Let me know if you're still having difficulty.

So actually I can't see anywhere "Skip rebuild" checkbox in UI version but I've managed to do it with console and now it actually works as intended. I also coded simple python script and batch file for automation to play desired seed ingame, so I'm attaching that in case anyone without debugger knowledge can use it. Also, I PM'd you with probe output for mentioned game version.



https://filebin.net/iqo7yi1xpxpkf3dq

put both files in the same directory and run "run_fm24_seed.bat" when you are on this screen: https://fm-arena.com/find-comment/54673/

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FREVKY said: So actually I can't see anywhere "Skip rebuild" checkbox in UI version but I've managed to do it with console and now it actually works as intended. I also coded simple python script and batch file for automation to play desired seed ingame, so I'm attaching that in case anyone without debugger knowledge can use it. Also, I PM'd you with probe output for mentioned game version.



https://filebin.net/iqo7yi1xpxpkf3dq

put both files in the same directory and run "run_fm24_seed.bat" when you are on this screen: https://fm-arena.com/find-comment/54673/


Let me know how this goes: v1.0.30

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