Atacama - The Mining Conflict 2013

A tactical two players game. You need only two minutes to explain it. Each player alternatley place one of his 14 rigs of the same color on the 9 to 9 square board. Rigs may not be placed orthogonaal to existing rigs. Only rows and columns with at least 4 rigs are assessed. You have to now that only the fields with rigs on are revieuwd.
One player scores positive points for occupied gold and silver fields and negative for the copper fields in the vertical columms. For the other player, the horizontal rows are evaluated but for him/here count the gold and copper fields positively and occupied silver fields negatively.
Each ore is one (+ or - )point.
The rigs remind me of the game "Giganten"
Don't remember an other two players game with such idea.
I'm afraid that the replay value is low however when you lose don't you want a replay?