Help & Documentation

Each tile contains a real competitive programming problem from Codeforces. When a team member submits a correct solution, that tile is automatically claimed.

Classic mode: The first team to complete a full row, column, or diagonal wins. Claimed tiles stay claimed permanently.

Replace mode: When a tile is claimed, it is immediately replaced with a new problem so the board stays full — matches run longer with no downtime.

Solve problems to push the rope toward the opponent's side. Each accepted solution adds that problem's rating as points to your side.

Classic: One problem at a time. Reach the threshold to win.

Grid: Multiple problems active at once. Dominate more cells. Team with rope advantage when time runs out wins.

Solve problems to earn coins. Spend coins to claim train routes on the map. Complete destination tickets for bonus points.

The team with the most points when time expires wins.