ペイントで書きました。図汚くてごめんなさい。4層攻略中の外人さんのフレ用に、下手糞ですが英語を併記しています。
I wrote it in paint. I am sorry that the figure is dirty. Sorry for my poor english.
左がオレンジの時(When the left is orange)上半分を考える。3時から反時計回りに進む。
Consider the upper half.Proceed counterclockwise from 3 o'clock.
違う色(青)が0個なら3時が安置
違う色(青)が1個なら3時から1つ進んだ1時が安置
違う色(青)が2個なら3時から2つ進んだ11時が安置
・If there is 0 different color (blue), 3 o'clock is safe zone.
・If there is 1 different color (blue), A safe zone is 1 o'clock which went counterclockwise once from the 3 o'clock safe zone.
・If there are 2 different colors (blue), A safe zone is 11 o'clock which went counterclockwise twice from the 3 o'clock safe zone.
左が青の時(When the left is blue)下半分を考える。9時から反時計回りに進む。
Consider the lower half.Proceed counterclockwise from 9 o'clock.
違う色(オレンジ)が0個なら9時が安置
違う色(オレンジ)が1個なら9時から1つ進んだ7時が安置
違う色(オレンジ)が2個なら9時から2つ進んだ5時が安置
・If there is 0 different color (orange), 9 o'clock is safe zone.
・If there is 1 different color (orange), A safe zone is 7 o'clock which went counterclockwise once from the 9 o'clock safe zone.
・If there are 2 different colors (orange), A safe zone is 5 o'clock which went counterclockwise twice from the 9 o'clock safe zone.