Challenge via eMail -- Duel with a Ghost
In the previous section, we described Dokugram Facebook, an exciting new way to start a global Doku party with your Facebook friends. Never interested in Facebook? Maybe you use, at least, an email?
A small pistol button that appears at the end of a successful solo session allows you to email the Dokugram, the data package of the puzzle and your move-history, to your friends (including yourself). If your friend taps and open the dokugram that is sent as an attachment (assuming that Doku is already installed on the iOS device), Doku will start a simulated duel session. It pits your friend in a race against your former self, using the history of your moves made earlier on the same puzzle, replicating the audio-visual ambience you would have with a live opponent. (except for the weapons use, though) The dokugram also carries an abbreviated history of previous players' stats accumulated over time as it bounces among a circle of friends. When you beat the dokugram, you will see how you fared against previous players.
Just like the Facebook-based dokugram, if a dokugram that you had played earlier comes back to you, Doku transforms the puzzle into one that looks different, but has the same level of difficulty, so you can try it afresh. (Depending on the version of Doku, sending out a dokugram may consume one eCapsule.)
Tweet S.O.S!
In the Doku lab, our scientists briefly experimented with a real-time collaborative mode for solving a cipher. They concluded that it is rather annoying than fun as it dilutes the intellectual satisfaction of cracking a hard puzzle by one's own intellectual effort. A superior intellect should know when to seek help from a friend. Consulting the built-in hint (for levels Blue and up) is an option, but consider first posting the puzzle to your twitter followers. This option pops up when you pressing the resign button as part of the confirmation. Doku prepares an image of your board as is and posts the SOS tweet. Take some break, and wait until any of your twitter followers prove his loyalty to you.
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