2 Players:

The first player throws 3 dice. If most of them are odd this player would be the EVEN player, otherwise he would be the ODD player.

The objective of the ODD player is to get a or a or a

The objective of the EVEN player is, as you can imagine, to get a or a or a

The game begins with the player who has thrown the first 3 dice (which form the starting position). At every turn the other 3 dice are thrown and the player has to do from 0 to 3 DiceShifts (as many as he want) which consist in exchange one of the throwed die for another one previously played which has the same punctuation ±1 (understanding that 6+1=1 and 1-1=6).

For example, if the current position is (the order doesn't matter) and the throwed dice show you can play like this:

→ »
→
→ » »

And obtain the final position

If you make 3 DiceShifts in your turn (as in the example above) you have another turn. If you can't (or just don't want) make 3 DiceShifts the next turn is played by your adversary.

If you reach one of the objectives of your opponent in your turn you have lost. Even if you still can make another DiceShift in this turn.

Solitaire:

Just play like both players trying to finish the game as soon as possible (you score 1 negative point for every turn until the end of the game).

You can find here the original (Spanish) rules.