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http://en.lichess.org/training/47796

How about think it through thoroughly and play the mate in three sequence?...

That said, there's no mechanism to "salvage" and change puzzles that have already been generated, so this request is moot.
Chesstempo has free training and allows alternates (well u get an extra shot to find the true solution). I think the implementation here is just fine.

you got 2 "not best checkmate sequence" in your line lol.

You got it wrong, u lose a couple rating points and you move on to "find the best move" in the next tactic. Why make these guys do all this extra work so that you can feel justified that your solution has value :-)

(at least u can find mate in 1.. otherwise you couldn't post here lol)

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