| 1 | p.boxed. |
| 2 | The board is divided into 16 square cells of size 2x2. |
| 3 | A piece must change cell at each move. |
| 4 | |
| 5 | p. |
| 6 | The board is decomposed into 16 little 2x2 squares, starting from |
| 7 | a1,b1,a2,b2 until g7,h7,g8,h8. When a piece moves, it must cross at least |
| 8 | one boundary: it cannot remain in the same cell. |
| 9 | So, pieces in the same cell don't attack each other. |
| 10 | |
| 11 | figure.diagram-container |
| 12 | .diagram |
| 13 | | fen:1r1kr3/3nbbQ1/6p1/4p3/1qp1p3/PR1P1NPP/4nP2/2B1KR1B: |
| 14 | figcaption. |
| 15 | The white king under check cannot take the knight, |
| 16 | and Rxb4 is not possible. |
| 17 | |
| 18 | p. |
| 19 | Pawns are Berolina pawns: they move one square diagonally forward and |
| 20 | capture one square orthogonally forward. |
| 21 | |
| 22 | h3 Source |
| 23 | |
| 24 | p |
| 25 | | This variant is mentioned in |
| 26 | a(href="https://www.jsbeasley.co.uk/encyc.htm") |
| 27 | | The Classified Encyclopedia of Chess Variants |
| 28 | | . |