This game vexes me. But, I do enjoy figuring out the theoretical limits of what's possible. And since I've been a little sick lately, I took a look at the current All Time High Scores to see what correlates best to achieving a 42,000+ score.
1. The biggest factor in the top scores is the bonus. The bonuses for the all time high scores are: 1- 16, 2- 18, 3- 16, 4- 16, 5- 15, 6- 14, 7- 15, 8- 14, 9- 13, 10- 12. Without a bonus of at least 14, I doubt breaking the high score record is a reasonable goal.
This makes 1's and 2's the most valuable #s in the game.
2. Not surprisingly, all the high scores got a disproportionate # of 6's. In your nine rolls of the dice, you should average 7.5 6's (and every other #). Among the top ten high scores, the average # of 6's was 12.1.
Surprisingly, the #1 all-time score had the fewest 6's on the high score list with just nine. It was offset by the +16 bonus and a record thirteen 5's.
3. A strong second chain of 5's is the third biggest factor. Though, in two cases (Zac's #3 45,696 and Mikus' #8 42,420), the second chain was 4's. Only in two cases (cavdaddy's #1 47,744 and Mikus' #8 42,420) was the 5's/4's chain longer than the 6's chain.
4. I'm putting this 4th, but arguably it could be #1 on the list. Getting few 3's is critical. The high score list averaged just 4.0 3's and only one score (Luke's #6 43,162) got as many as six 3's.
3's are absolutely useless in this game.
5. A third chain (preferably of 4's) is very helpful. The best third chain on the high score list was worth 3,780 points (Dynasty's #7 43,155). A third chain which occupies three areas can rack up decent points. If you can manage to get a five area third chain it can be worth more than 10,000 points with a strong bonus.
Putting all this together, I came up with this theoretical, and somewhat ideal, diagram hoping to learn something.
This board is worth 51,000 points.
Chain 1: 1,200; Chain 2: 1,000; Chain 3: 800; Bonus: 17
It has four 3's, the average # of the high score board.
It has nine 1's and eight 2's, slightly above the average.
It has eight 6's, well below the average.
It has eight 5's, at the average.
It has eight 4's, above the average.
The reason this diagram has above-average 4's and below-aveage 6's is that I chose to create a diagram with three chains in five areas. A similar high score (50,048) could be achieved by changing four of the 4's to 6's, but keeping the 4's chain in three areas.
Perhaps the most important data I got out of this was how to properly place 1's, 2's, and 3's on the first four rolls.
This is where they should go.
In the first four turns, it would be an error to place a 1 on the outer edge/center square. That would prevent you from using any of the adjoining squares for future 1's. You'll likely need to place two 1's in the four outer areas in order to achieve a record breaking score.
Likewise, placing a 2 on the outer edge/center square is necessary so that you can easily place a 2 next to it in Rounds 5-8. Don't rush to pair your 2's in the early rounds. If you get exactly four 2's in the first four turns, you should place one 2 in each of the four outer areas. Pair them up in rounds 5-8.
3's are worthless. So, the priority is to keep them out of the way. It surprised me that putting them in a middle row/edge was the best way to do this. I had instinctively put them as far from the center as possible whenever I got a 3. But, doing so can disrupt the harmony of the 1's and 2's.
Keep a lookout for my upcoming book which has a couple working titles:
Triplechain for Advanced Players or
Dynasty on Triplechain.