4 for a Boy: Near Field Cache/Winter Geolympix FTF Letterbox Hybrid

Released at the 2018 Winter Geolympix as part of the FTFrenzy. This cache may contain a voucher for £5, £10, £20 or £50 on publication. Locate the envelope in the box and follow the instructions on it CAREFULLY! Failure to do so may result in forfeiture of the FTF Prize. Please cache responsibly and courteously!

Boys like gadgets, right?

You will need a device which can read NFC (Near Field Communication) Tags to complete this cache. If you don't own such an item - many Smartphones have NFC built in - please post a note on this cache asking to team-up with another cacher or cachers who do. If you're able to help, please contact the cacher via the Geocaching site.

At the given co-ords you'll find a post. Wand your NFC-compatible reader over it until it gives you two possible sets of co-ords of the next stage. Only one is real. The other will take you to a similar item which has a significant difference. Repeat until you're taken to a point without a post close by. That's where the final is. The trail is approx. 2 miles/3Km in length if you make poor guesses, but there are other caches to do along the way (unless you've done them already!). If you make good guesses it's a fair bit shorter. Cross any roads with care.

Note the values for X, Y and Z in this cache to help you find FTFrenzy cache 10 for a Bird You Must Not Miss! - Please DO NOT remove the stamp or ink pad. Neither is a swap - They make this cache a LetterBox/Hybrid. Thank you!