click/drag ringshift+click ccw←/→ or R turn↑/↓ or / flipU undoC clear
Tip — every piece is solid, with the same number on both sides: white sticker on one side, grey on the other, so a grey number means that piece has been turned over. Click or drag the ring to turn it 30°. The cut runs left–right (the small arrows); click the PUCK half to flip the upper half over, which reverses those six pieces and shows their other sides.
σ ε
EvenOddCentre flipped
Apply a move sequence
Conjugates — record a sequence α, then undo it with α⁻¹nothing recorded