Tactics trainer on Android phone

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Eaglefour

Hello,

 Since a few days, I am having a problem with the tactics tainer on my android phone. Very often it proposes this problem :

 

 

It won't let me move any piece and if I try to skip the pb or go to the next one, it is always this one which appear. If I try to see the solution, it shows strange and impossible moves.

Any help would be appreciated (I love doing tactics on my phone Smile)

kevins55555
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