Undertow Citadel
Rescue seven citizens (♟) from the citadel. Tap a column to insert ballast into its LOWEST empty cell. Completing ANY row triggers undertow: only the BOTTOM TWO rows are swept away, and everything above drops two levels. Citizens in swept rows survive only in lit harbor lanes: 1/3/5, then 2/4, alternating each tide. Shift either rescue row right to align them first. Every shift or placement raises pressure; reach a tide before pressure 4. Ten ballast blocks are available.
Tap tiles, or use Tab and Enter. Arrow keys move board focus.
Challenge notes & source
Watch the game-specific limits in the status panel. A completed or failed run locks input; Reset restores the original puzzle.
Round 2 redesign: Rescue seven citizens (♟) from the citadel. Tap a column to insert ballast into its LOWEST empty cell. Completing ANY row triggers undertow: only the BOTTOM TWO rows are swept away, and everything above drops two levels. Citizens in swept rows survive only in lit harbor lanes: 1/3/5, then 2/4, alternating each tide. Shift either rescue row right to align them first. Every shift or placement raises pressure; reach a tide before pressure 4. Ten ballast blocks are available.
Original compact interpretation, not a recreation. Source study: Sinking Spire. No source code, music or artwork copied.