There may be real or perceived advantages to playing the first (or last?) piece, so enough games should be played to allow each player a turn at starting.
The first player takes a pentacube from the 12 available and lays it on its face in the centre of the table. There is no score for this.
The second player takes a pentacube from those remaining and places it on its face so that one of its corners touches a corner of the first piece. Vertical faces of the touching corners should be at 90 degrees. There is no score for this.
The next player takes a pentacube and places it using only one hand in any orientation, above the first two pieces so that at least one unit face on the piece touches at least one unit face on each of the first two pieces, and no part of the third piece is below the tops of the first two pieces. The player scores one point for each face of his piece which touches a face of one of the first two pieces.
Play progresses with each player in turn adding a pentacube to the pile, using only one hand, in any unit face to face orientation. A player scores one point for each horizontal unit face of his piece which touches a horizontal unit face of one of the existing pieces, and two points for each vertical unit face of his piece which touches a vertical unit face of one of the existing pieces. It is forbidden to play a piece in such a way that one of its upper faces touches the underside of a previously played piece, as this could destabilise the pentacube pile.
After all pieces have been played, points are totalled for each player. New games take place until each player has taken a turn at starting. The highest-scoring player wins.
We’ll now go through a game step by step, highlighting scoring and illegal moves.
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