Risk Rolls
Rectangle Partition
Prime Distance
Network Rumour
Nonempty Rectangles
Educational Codeforces Round 146 (Rated for Div. 2) B. Long Legs
Codeforces Beta Round 3 C. Tic-tac-toe
Codeforces Beta Round 7 C. Line
Codeforces Beta Round 15 B. Laser
Codeforces Beta Round 16 (Div. 2 Only) C. Monitor