Piano polyphony

[Tomas Valusek]

Hello,

in piano music, there are often situations where temporary voices are 
introduced. It's not true polyphony, because the additional voices are 
temporal and are use only to mark prolonged notes. What is the simplest 
way to typeset the example shown in attachement? It was created using 
Lime and I wasnť forced to create additional voices, since Lime allows 
combining different note durations within a single chord. If there were 
no ties, it would be rather straightforward.

Tomas Valusek