ZARUBA
How to play
Two 10×10 boards, hidden ships and a search for the opposing fleet. Take turns firing, and keep your turn whenever you hit.
Place your ships
Each fleet has ten ships: one four-square ship, two three-square ships, three two-square ships and four single-square ships. Place them horizontally or vertically. Ships cannot overlap or touch, even diagonally. Drag and rotate your ships or use random placement.
Invite your opponent
Create a room. The large waiting-room button copies the full invite link; the room toolbar copies only the code. Your friend signs in and opens the link or enters the code. Both players then confirm their fleets are ready.
Fire and read the result
Choose a square on the enemy board. A miss means empty water and passes the turn. A hit damages a ship and gives you another shot. Hitting every square of a ship sinks it and also lets you shoot again. You cannot fire at the same square twice.
Win and play again
Sink every enemy ship to win. The final board reveals the opposing fleet. Offer a rematch; once your opponent accepts, place your ships for a new battle.