Actually a 13x13 board is necessary to show the full movement of the Rose. See Chess on a Really Big Board under 'Four Board Chess' for an ASCII diagram of the Rose's moves on a 16x16 board.
I prefer to use a Half-Rose (Ralph Betza's Halfling Rose) which makes at most 4 Knight leaps, travelling a half circle. Limiting the Rose to 6 successive Knight leaps, as in Irwell, can still produce strange results. I intend to present an example in my 12x12 variant.
Actually a 13x13 board is necessary to show the full movement of the Rose. See Chess on a Really Big Board under 'Four Board Chess' for an ASCII diagram of the Rose's moves on a 16x16 board.
I prefer to use a Half-Rose (Ralph Betza's Halfling Rose) which makes at most 4 Knight leaps, travelling a half circle. Limiting the Rose to 6 successive Knight leaps, as in Irwell, can still produce strange results. I intend to present an example in my 12x12 variant.