Firefox Chess. You can use this addon to preview chess games in PGN format. Select the PGN of the game in any page, right click and RoattaWaaayyyy!!!!!
These are samples of games you can select and play:
1. e4 e5 2. Bf1c4 Bf8c5 3. Qd1h5 Qd8f6 4. Bc4xf7 Ke8d8 5. Bf7xg8 Qf6xf2
6. Ke1d1 Qf2f1 0-1
Start from a random position sample:
[Event "white to move"]
[FEN "rn2r1k1/ppq2pb1/2pp2pp/8/2PQn1b1/1PN2NP1/PB3PBP/3RR1K1 w - - 0 17"]
17.Qxg7 Kxg7 18.Nd5 Kf8 19.Nxc7
This is sample of FEN position you can select and preview:
rn2r1k1/ppq2pQ1/2pp2pp/8/2P1n1b1/1PN2NP1/PB3PBP/3RR1K1 b - - 0 17
To rotate board click on the bottom left corner of the board.