Oh, you're right. Bummer, I moved a 2-clue from C4 in the second grid to C6 in the first for aesthetic reasons because I thought they were equivalent. Must've overlooked something when re-solving.

Carlos, thanks for the two solutions given. There is also a 3rd solution:
_2134_
_4_132
413_2_
23__14
3_42_1
1_24_3.
Unfortunately, in such cases, points are not allowed.

Congratulations+to+the+winners+%E2%80%93+James%2C+Christian%2C+Paul+and+Ken%21%0D%0AThanks+to+all+participants%21%0D%0A

Thanks+Riad+for+creating+this+contest+for+us+again%2C+it+is+very+unique+on+the+puzzle+calendar%2E+%E2%9D%A4%EF%B8%8F%0D%0AI+had+spare+time+this+year+to+play+with+the+optimizers%2C+but+also+I+was+a+little+lucky+to+find+some+good+scores+quickly%2E+Everything+fit+together+nicely+%F0%9F%98%8E%0D%0A2+days+before+the+end+I+learnt+my+rules+were+wrong+for+two+of+them+%28I+had+an+unconnected+crossword%2C+and+two+unlinked+Easy+As%27s%29+but+was+able+to+find+better+solutions+luckily%2E+%0D%0AWell+done+to+Christian+for+fixing+his+crossword+and+still+having+the+best+of+all%2C+that+was+very+hard+to+find+any+solution+better+than+TIM%2FLIN%21

Thanks a lot for this annual contest, Riad, and specifically for this edition. The puzzles were amazing to solve (I think I spent most of the time on the Kakuro with stars), and I found the first two optimizers very fun to investigate.
Huge congrats for kiwijam, you were so close to have the best scores on all the optimizers! You really deserve your first place.
See you next year :)

Hi everyone, I am new to this platform. Can anyone tell me where can I find the solutions for all puzzles ?