--- /dev/null
+p.boxed
+ | The board is initially empty.
+ | Add a piece (not giving check) or move one at each turn.
+
+p.
+ The king can be added at any moment, but while he hasn't landed
+ no capture can be done. So you could move or land your king "into check"
+ if your opponent didn't land his king yet.
+
+p.
+ Giving check with a landed piece is forbidden
+ (assuming both kings are on the board).
+
+p.
+ Pawns can be landed on the four first ranks only. A pawn on the first
+ rank can jump two squares, and be captured en passant.
+
+figure.diagram-container
+ .diagram.diag12
+ | fen:8/8/3b2r1/3R4/k3Q3/3R4/8/8:
+ .diagram.diag22
+ | fen:8/8/K2b2r1/3R4/k1N1Q3/3R4/5q2/8:
+ figcaption.
+ Left: no white king, so the black king is safe.
+ Right: black to move, there is no way to avoid mate.
+
+h3 Source
+
+p
+ a(href="https://www.chessvariants.com/diffsetup.dir/unachess.html")
+ | Unachess II
+ | on chessvariants.com. Unachess I gives a too large advantage
+ | to white, in the few games I could play.
+
+p Inventors: Jeff Miller and Edward Jackman (1995)