Stryfe
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As far as I know, in gosolo mode, the AI can do things that a human player couldn't do in a normal game – for example, cast area-of-effect spells on cursed ground... so, if we find ourselves in a hopeless situation and can't, for example, teleport home, it's worth pressing "gosolo" – and we're already in a good position. So, in a way, it's still a cheat.