Changes

[[File:DC2-ext Base.png|thumb|alt=|A DC2-extended variant]]

[[File:DC2-ext Base.png|thumb|alt=|A DC2-extended variant]]

The second core can be extended to a 3h sleep. People with high sleep requirements (especially in both REM sleep and SWS) may benefit from the extra sleep. The first core can also be delayed, starting possibly at midnight. However, DC2-extended has had few attempts, and virtually no success. DC1-extended and E2-extended are recommended instead, as both are easier to schedule, and no more difficult to adapt to.  

The second core can be extended to a 3h sleep. People with high sleep requirements (especially in both REM sleep and SWS) may benefit from the extra sleep. The first core can also be delayed, starting possibly at midnight. However, DC2-extended has had few attempts, and virtually no success. DC1-extended and E2-extended are recommended instead, as both are easier to schedule, and no more difficult to adapt to.  

===TC1-alike ===

===TC1-alike ===

[[File:Dc2tc1.png|thumb|A DC2 variant with TC1 structure]]

[[File:Dc2tc1.png|thumb|A DC2 variant with TC1 structure]]