3D Chess is a complete chess game rendered on a three-dimensional board, with four computer difficulty levels and a two-player mode for playing someone across the table. The rules are full standard chess — castling, en passant, promotion and all.
The 3D board is a matter of taste; some players read a perspective board more naturally, others prefer flat. What matters is underneath: the difficulty levels are graded well enough that a beginner has somewhere to start and an experienced player still has to think at the top setting.
Yes — the two-player mode shares one board and screen, with each player using the mouse in turn.
There are four levels. Level 1 is designed for beginners and level 4 will punish casual mistakes, which is a reasonable range for a browser game.
Yes — tap a piece then its destination. Nothing to install.