diff --git a/docs/heuristic.md b/docs/heuristic.md
index 3b0b9ac5..e546b1e1 100644
--- a/docs/heuristic.md
+++ b/docs/heuristic.md
@@ -11,6 +11,8 @@ The chess variant as per these options.
 - `dunsany` is an asymmetric variant in which Black has the standard chess army and White has 32 pawns.
 - `losing` chess, the objective of each player is to lose all of their pieces or be stalemated.
 - `racing-kings` consists of being the first player to move their king to the eighth row.
+- `capablanca` chess incorporates two new pieces, the archbishop and the chancellor, and is played on a 10×8 board.
+- `capablanca-fischer` is a mix of Capablanca chess and Chess960.
 
 ## `movetext`
 
diff --git a/docs/start.md b/docs/start.md
index 1ea96130..1bbe156c 100644
--- a/docs/start.md
+++ b/docs/start.md
@@ -11,6 +11,8 @@ The chess variant as per these options.
 - `dunsany` is an asymmetric variant in which Black has the standard chess army and White has 32 pawns.
 - `losing` chess, the objective of each player is to lose all of their pieces or be stalemated.
 - `racing-kings` consists of being the first player to move their king to the eighth row.
+- `capablanca` chess incorporates two new pieces, the archbishop and the chancellor, and is played on a 10×8 board.
+- `capablanca-fischer` is a mix of Capablanca chess and Chess960.
 
 ## `mode`