Ivory Detour
Trade the knights’ homes. Choose a knight, then a green landing. Try Courtesy exchange for alternating turns and partner-attack restrictions.
Knight moves & courtesy rules
Swap the two knights: white must reach cell 16 and black cell 1. Select a knight and then a destination. Only true chess L-moves onto empty cells are legal.
Courtesy exchange alternates white and black after every leap. A knight cannot finish on a square attacked by its partner. Green landing hints respect shape, barriers, occupancy and courtesy; both must still swap homes.
Yield turn lets a blocked knight pass to its partner without moving.
Courtesy starts black at r4c3. Both destination homes are protected sanctuaries.
How to play & accessibility
Swap the two knights: white must reach cell 16 and black cell 1. Select a knight and then a destination. Only true chess L-moves onto empty cells are legal.
Tap controls, or Tab then Enter/Space to activate every board cell and action. Arrow keys move where supported. R restarts. Z undoes in calm puzzles. B and W mark the destination homes. Green squares show legal landings. All controls are at least 44 pixels.
Source & original design
Compact original rules study inspired by the listed mechanic, not a full reproduction. New name, board layouts and CSS artwork; no source assets copied.
Source: Knight Swap