Hint: Try writing each statement as 'finished before'.
Answer: Blake won...
...then Dale, Alex, Chris and Emery.
By placing the person who finished higher to the left we have:
1. Dale finished before Alex Dale > Alex 2. Emery finished after Blake Blake > Emery 3. Alex finished before Chris Alex > Chris 4. Emery finished after Dale Dale > Emery 5. Blake finished before Alex Blake > Alex 6. Dale finished after Blake Blake > Dale 7. Chris finished before Emery Chris > Emery
From 1 and 3:
Dale > Alex > Chris
Dale > Alex > Chris > Emery
Blake > Dale > Alex > Chris > Emery
Which is the final placing for all of the players, and can be double checked with the remaining clues.