On Wednesday night I was solving a few puzzles in North Hampshire to pick up over the weekend and just as I was about to pack up noticed that these three puzzles had been published. So I had a quick look. This one was very frustrating. After twenty minutes I got quite excited as I had managed to find a way of getting the three most significant numbers out in a consistent manner, but whatever I tried with the others either gave nonsense or failed the checksum.
I had another look at lunchtime but didn't get any further - I was trying variations of my original idea that just had to be right. I had solved #3 last night but saw that Mellers had FTFed it early in the morning. No worries, its a fair journey down the A3 for me and I wasn't planning to collect them until I'd solved the full set. Anyway Bobcat was working late in Guildford and I had to pick him up at 8pm. He needed to eat after that as well, so while he did I had one a quick look at this puzzle again.
I had a thought - maybe the big idea from last night was completely wrong. With that out of the way and a clear head another idea immediately came to me and this time I knew it was right. So now I had the three puzzles solved but it was approaching a quarter to nine.
I checked to confirm that nobody had logged a find (and also Googled to see how long the journey was and when sunset would be). We had a quick debate on whether to try for the two FTFs and decided that we would. No delays on the A3 and it was still fairly light when we arrived. Bobcat found this one after I'd tried searching in a few wrong places. Really pleased on the two FTFs - we don't get many of them nowadays.