Ouch!!

playstrategy.org/OmtfQyJF/p2#37

So close!

I missed the fact that my rook was also being attacked by his bishop

1

playstrategy.org/S9F5bkzCiAvs level 8 17 moves

2

Sorry @Nikitosik1708 winning on timeout isn't accepted for the weekly challenge. The bots are occasionally prone to timing out particularly in short time controls, but just moving quickly isn't the intention of the challenge. You've still got a couple of hours left to try again!

11

playstrategy.org/bOntF5tS level 1

13 move

Entries for Weekly Challenge 20 has closed. Thanks to all users who participated.

The winner is @e-pluszak who beat Stockfish level 6 in 41 ply: playstrategy.org/ALUzrqsC

Users are still welcome to attempt this challenge and post answers here, but the winner has been fixed. The next challenge can be found here: playstrategy.org/forum/weekly-challenges/weekly-challenge-21-connecting-sides