Two and three are both enchis. Is this a game or is help really needed?? Not to be rude but I just didnt understand if the OP knew the answer and was testing others or if they really needed help with the ID.. 2 and 3
1.0 Striped African House Snake "Marduk"
0.1 Striped African House Snake Ishtar
1.0 black phase Brown House Snake Seth
0.1 black phase Brown House Snake Nephthys
This question may not be able to be answered unless they are bred. We need more info. If they are CH babies, they could indeed have the same genetics as an Enchi, although you may say they are not. If they came from an Enchi clutch, they may in fact not be an Enchi(mainly ugly one) although they look like one. They would need to be bred.
So to answer your question. BG has no clue. He has seen animals like those purty ones that were captive hatched babies, but didn't produce babies that looked like them. BG has also seen some very ugly Enchis in his time that have produced nice ones. We will be waiting the answer to your question with "baited breath".