Flat Chances Mat has a D4, D6, D8, D10, D12, D20, and D100. It also has a placement area to keep track of which stage of coin flip is either heads or tails.(The choice of black or white representing heads or tails is up to you.)
Flat Chances are series of handmade decision trees that utilize the randomness of flipping a coin to simulate different dice or other denominations of values.
With a Flat Chances decision tree, starting at the center circle flip a coin to navigate to each outer circle to reach your target circle group. Without a decision tree, divide the max number you want as a dice roll into 2 equal groups. If the grouping is not an integer(whole number), share the middle value with both groups to even it out. (I.E. ‘9’ is the max number. Dividing 9 by 2 would result into 4.5 in both groups. The first group being 1-to-4.5 and the second group being 4.5-to-9. Sharing the integer with both groups would make the first group 1-to-5 and the second group 5-to-9.) The first group is heads and the second group is tails. Keep dividing the groups into two equal parts with each flip of the coin until there is only one choice left. Each time if the group is uneven, share the middle value with both groups.
Other than a coin, you can use all sorts of different ways to represent a random choice between heads or tails.
| Component | Quantity | Photo |
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| Average Rating | 1 reviews |
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| Publish Date | September 06, 2025 |
| Edition | Third |
| Department | Games |
| Tags | {{tag.properties.name}} |
| More Info | Flat Chances mat web site |
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