Loren Brichter created Tweetie, the incredible iPhone app that eventually became the official Twitter app. He invented pull-to-refresh. And if you had asked me what kind of app he might release as his long-awaited follow-up to Tweetie, boy, I never would have guessed. Now I know the answer, and I'm as pleased with the result as I am surprised by it: It's Letterpress, a word game with a healthy serving of strategy to go along with it. It works on the iPhone and the iPad, and it's awesome.
As you'd expect from a Brichter-built app, Letterpress is beautifully designed, with a sparse, minimalist appearance. It's a two-player game; you can create games with random opponents, or play against your Game Center friends.
Because the game's approach is unique--sort of a clever mashup of Boggle and Strategery--it takes some time to explain (and master) the rules. Once you get them down, though, Letterpress is alarmingly addictive.
At the start of a game, you're presented with a five-by-five grid of assorted letters. On your turn, you can use any of the letters to build a word. The letter tiles needn't be adjacent; you can tap from anywhere. After you submit your word, the tiles you used turn blue. Then it's your opponent's turn to make a word. The tiles he or she uses to spell a word turn pink.
You can't reuse words that have already been played. If you play "escapes," your opponent can't play "escape," either; words that exist as prefixes of previously played words are rejected.
When it's your turn to build a word again, you can use tiles you've already turned blue, use unclaimed white tiles, or use the pink-colored tiles that your opponent played. As you play, then, some tiles will go from blue to pink to blue again, if you and your opponent keep spelling words with the same letters.
But there's one important exception: If you box in a blue tile with other blue tiles--that is, if you completely surround a blue tile with other blue tiles--it turns a darker shade of blue. Even if your opponent spells a word using such a tile, its color won't flip to pink. A key strategic element in Letterpress is thus attempting to box in your own tiles to lock their color, and simultaneously scheming to unblock your opponent's tiles.
Once all the tiles have been used (or after both players skip a turn), the game ends. Whichever player turned more tiles to his or her color emerges the victor.
I tested the game for several weeks, and I frequently had numerous games going. Letterpress is fun and compelling enough that I needed to remind myself to put my iPhone down and, say, eat.
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