A vigil game using sowing with stacks. After every turn you must still see the board centre. Mix forward movement, capture, and sowing so armies can grow.

Inventor: João Pedro Neto

See BoardGameGeek thread: Rules of Sentinel.

• Current engine version: 20260328 (2026-03-28). On Abstract Play since 2026-04-22.

• Vigil games require an uninterrupted line of sight to a designated point. Sentinel is the second recorded vigil abstract after 1892’s Kastellet.

• https://boardgamegeek.com/thread/3651706/rules-of-sentinel