Just when you thought this is all but dead......
This challenge has only been verified on SNES Lemmings so far. However, it doesn't use any tricks that isn't already present in at least the PC and the Amiga version, and I've checked that the steel areas appear to be located identically on the PC version (and I believe the Amiga too but I should re-check) as in the SNES version, so it should work on those versions too. I'll verify them later in the future. Time-wise, I have 28 seconds left on the clock on the SNES (and the crowd can be released a little sooner for more time left), and the SNES's game speed appears to be similar to the Amiga (and SNES also has 100 lemmings like the Amiga), so hopefully you shouldn't run out of time in any version. (There are no radical changes with release rate so that's not an issue either.)
the challenge:
Mayhem 29: lose 3
without building to the west from the starting platformAlthough this doesn't break any record score-wise on the PC, this is noteworthy since for the first time, it allows for a lose-3 solution on other versions. If you recall, the PC version lacks the water, and the lack of water is critical in enabling the currently known lose 3 route.
This new solution still requires digging through steel though (elsewhere, of course), which is one reason why it's not possible to combine the two different tricks on the PC to get lose 2 (the other being that I think you'd run out of builders anyhow).
Definitely a very tricky solution to conceive of, and somewhat tricky to execute as well. To give you an idea, you need to have at least 4 builders + 1 digger left to handle the area near the exit (and it's probably not what you have in mind, whatever it is you're thinking
). This means you can only use a total of 9 builders to deal with the starting platform, since you need 1 builder to build to the column from the left edge of the top platform on the starting screen, and another builder to break the fall when you dig down from the column.
You need at least 7 builders (4 to the right then 3 to the left) to build to the top platform on the start screen. You also need one builder in order to be able to free (via bashing) a blocker used to contain the crowd while you're building 4 times to the right from the starting platform. I'll leave it to you to puzzle over how to deal with the crowd after that point with just 1 builder spare-able for the purpose, as well as what to do near the exit area that somehow allows you to use one less blocker than usual.