there was a post here on PF about a chess position created by mathematics professor Sir Roger Penrose which computers could not solve. unfortunately the thread was locked so I made a new thread. < Mentor Note -- this thread is different, so the re-post is okay > it was the following position. white to move and make a draw. although computers give a huge evaluation for black they will defend perfectly with white and eventualy make a draw. so they actually do ''solve'' the position even if they think black is winning. if instead you feed the computer the following position, it will choose the wrong plan and actually lose. humans are able to make a draw. can you see the right plan? white to move and make a draw.