160780

I chose a random coordinate to start with. Then I Looked at how many squares there were to the treasure. Say there were 6 steps away you would write down all the possible sulutions by clicking on the coordinates you think there could be. Then you would either get closer or further away to the treasure. You keep doing this until you start getting closer and closer to the treasure. You may get further away as you might put in the wrong coordinate but you keep going until you eventually reach the treasure! Once I had finished I tried again to see if I could get a better result than last go.