All together, these 3 documents are very rich of solving techniques.
IMHO, if interested => download the 3 ... not to miss some essentials.

Jean

Solve TREASURY_1.sm (25,42 KiB) descargado 1394 vez(es).

Solve TREASURY_2.sm (53,23 KiB) descargado 1320 vez(es).

Solve TREASURY_0.sm (116,61 KiB) descargado 1386 vez(es).