Google launched a promotion for the firm's Nexus S smartphone by unveiling a series of puzzles on Twitter with winners obtaining their very own Android 2.3-powered smartphone.
Newly created googlenexus twitter account is posting the daily puzzles which can, apparently, be won by anyone in the US, Canada or the UK. The last challenge was to craft a Nexus S-themed haiku.
At time of writing the twitter account gave a preview of the nexus challenge, saying: "brush up your Android 2.3 SDK knowledge: this one's for coders."
In judging the answers, Google's rules said that accuracy of the answer and timeliness of the response were the key criteria although for other forms of challenge, creativity, humour and the "best use of limited characters" would play a role.
The competition is limited to one entry per day for each person.