diff --git a/game/grid.go b/game/grid.go
index 43adb71..f215d8d 100644
--- a/game/grid.go
+++ b/game/grid.go
@@ -30,3 +30,12 @@ func (g Grid) Tile(x, y byte) graphics.Tile {
 func (g *Grid) Set(x, y byte, c Block) {
 	(*g)[uint16(x)+(uint16(y)*GRID_WIDTH)] = c
 }
+
+func (g *Grid) IsRowFull(y byte) bool {
+	for x := range byte(g.Width()) {
+		if g.At(x, y) == BLOCK_EMPTY {
+			return false
+		}
+	}
+	return true
+}