I have selected 12 in all but only some will be used in the tournament, as determined by a random draw.
The Danish Gambit: 1 e4 e5 2 d4 exd4 3 c3 dxc3 4 Bc4
This was Mike's big favourite as White. Black can keep on capturing pawns but at the risk of granting White such superior development that a quick attack could finish the game.
King's Indian Defence: 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7
Mike usually - and typically - aimed for dynamic play against d-pawn openings and the King's Indian Defence certainly suited his style.
Modern Benoni: 1 d4 Nf6 2 c4 e6 3 Nc3 c5 4 d5 exd5 5 cxd5 g6
Mike enjoyed the Modern Benoni too. It was never easy keeping the lid on his tactical tricks.
Nimzo-Indian Defence: 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4
One of the more positional parts of his repertoire. Mike tried this a few times early on his chess battles (mid to late 1980s) before it was replaced by the King's Indian and Benoni.
The invited players should have plenty of fun on both sides of the board if these openings are utilised in the tournament.