The other option was one heat of nine and two of eight and with Inter Dominions usually having at least one or two horses pull out during the first week, three heats per night could have seen at least one seven-horse heat by Friday week.
While the reduction to two heats will annoy some, it has resulted in a rarity in competitive betting races, helped in no small way by yesterday's draw for Friday's heats.
The traditional Inter Dominion format of three heats may be storied in history but the reality is in recent years they have seen some very short-priced favourites, dominant winners and uncompetitive racing.
But this Friday promises to be different because of the larger fields and their even composition.
For the opening two rounds a pass mark to be on track to make the $500,000 final will be a top six finish but horses settling back in the field are going to struggle to make that top six unless they move mid-race.
That alone should ensure some aggressive driving and even more so because most of the favourites in the pacing series have drawn awkwardly on opening night.
NZ Cup winner Cruz Bromac and Victoria Cup winner Bling It On, the two series favourites with the NZ TAB, has drawn second line and wide respectively, with Thefixer, Classie Brigade and Our Uncle Sam all also drawn on the second line.
Bling It On is joined in the wide draws by Queensland star Colt Thirty Eight while the only really favoured runner in the pacing series with a good draw is NZ Free-For-All winner Chase Auckland.
The trotting series has two heats of 11 starters and the crunch heat of the night sees Marcoola drawn barrier one over 2200m but on a fast front line that includes NZ Trot Free-For-All winner and fast beginner Tough Monarch.
If Marcoola returns to his best for new trainer Barry Purdon he could shorten dramatically for the final but if he is beaten from the ace draw the market will go the other way.
The other heat sees Dominion winner Habibi Inta drawn well at barrier four but no certainty to lead so the first heat of the series will start the uncertainty which could be the story of an intriguing fortnight.
Open night
• The Inter Dominions kick off at Alexandra Park on Friday night.
• There will be two trotting and two pacing heats of $30,000 over 2200m mobile.
• Many of the pacing favourite have drawn poorly which should ensure some even betting races to open the two-week carnival.
Friday fields
Fields for the opening night of the Inter Dominions at Alexandra Park on Friday.
• Race 5, 8.04pm: Breckon Farms Trot Heat, 2200m — Big Jack Hammer (1), C K Spur (2), Valloria (3), Habibi Inta (4), Massive Metro (5), Kenny's Dream (6), Pres The Belle (7), Didjabringthebeers (8), Paramount King (9), Monty Python (10), McLovin (11).
• Race 6, 8.33pm: IRT Pacing Heat, 2200m — Solid Gold (1), Ashley Locaz (2), Chase Auckland (3), My Kiwi Mate (4), San Carlo (5), Ultimate Sniper (6), The Devil Own (7), Colt Thirty One (8), Mach Shard (9), Conviction (10), Our Uncle Sam (11), Henry Hubert (12), Check In (13).
• Race 7, 9.03pm: What The Hill Trot Heat, 2200m — Marcoola (1), Destiny Jones (2), Woodstone (3), Credit Master (4), Temporale (5), Sertorius (6), Tough Monarch (7), Bonnie Highlander (8), Majestic Man (9), Ronald J (10), Winterfell (10).
• Race 8, 9.40pm: Downbytheseaside Pacing Heat, 2200m — Atomic Red (1), Sicario (2), A G's White Socks (3), Triple Eight (4), On The Cards (5), Star Galleria (6), Bling It On (7), Dance Time (8), Thefixer (9), Cruz Bromac (10), Classie Brigade (11), Another Masterpiece (12).