Solution of
Tres Ranas Enigma (Tres Ranas macho & Tres Ranas hembra) :
1, 2, 3, 4, 5, 6, 7 means position of a stone from left to right.
3-->4 means jump from stone 3 to stone 4.
step 1) 3-->4
step 2) 5-->3
step 3) 6-->5
step 4) 4-->6
step 5) 2-->4
step 6) 1-->2
step 7) 3-->1
step 8 ) 5-->3
step 9) 7-->5
step 10) 6-->7
step 11) 4-->6
step 12) 2-->4
step 13) 3-->2
step 14) 5-->3
step 15) 4-->5
or it is a mirror equivalent to start with brown frog 5-->4.