A complete description of the system played by Bocchi-Madala and now several other Italian partnerships, 110-page PDF and word doc.
Big Bang Bidding System
A complete description of the system played by Bocchi-Madala and now several other Italian partnerships.
The key feature is difference in structure when NV and V; highly-detailed relays (and Gazzilli) as would expect from an Italian system; and moving the Mexican 2D to 2C allows better auctions for those (at the cost of some GF hands).
This is a 110-page PDF (and editable word doc to accompany), no illustrative hands from real tournaments.
This is one of the two “families” of Italian bidding systems used internationally (the Lauria-Versace system is played by the rest of Italian internationals).
The Big Bang system has changed a little since 2014 when this was written (and they stopped playing the weird jump overcalls), but it’s generally the same. Play it as it was then, in this document, for maximum damage to the opponents, likely they stopped using odd preempts because, well, Bocchi gets bored fast (and with all the players playing it, the system had to get a bit easier to learn).