What a 100 square pool is
The board has 100 squares. One team runs across the top as the column team; the other runs down the side as the row team. Before the draw, the number rows and columns are blank. Players claim squares by writing their initials or tapping an empty cell. When the board is full, the digits 0–9 are drawn once for each axis and written along the edges. At the end of each period, the last digit of each team's score selects a column and a row, and that square wins the period's prize.
Why the 10x10 grid is the default
The 10×10 grid is the version most offices, families and bars use. It maps every possible digit pair to exactly one square, so there are no grouped numbers and no lookup ambiguity. It also fits on one printed page, which makes it easy to post on a wall and easy to photograph after the draw. A 100-square board needs a crowd to fill it, but a full board creates the biggest pot at the lowest buy-in. That combination is why it has stayed the standard.
Fill all 100 squares
Selling 100 squares takes more organization than selling 25. Print the board and pass it around at a party, or paste a names list into the generator and let it place entries. If one person wants several squares, let them claim a block; just record every square and keep a paid/unpaid list if money is involved. Set a claim deadline before kickoff. If squares remain, decide in advance whether they stay dead or the pot shrinks to the number sold, and tell every player which rule applies.
Payouts for 100 squares
The pot is 100 × the price per square. At $5 that is $500; at $10 it is $1,000; at $20 it is $2,000. The standard split pays 25 percent at the end of Q1, halftime, Q3 and the final, or 20/20/20/40 when the final should be worth more. On a $10 board, the even split pays $250 per period and the weighted split pays $200, $200, $200 and $400. Print the dollar amounts in the header so nobody has to calculate at the two-minute warning.
100 squares vs 25 squares
A 25-square board uses a 5×5 grid and gives each row and column two digits, so every square covers four digit combinations. It fills faster and suits a small group, but the pot is smaller at the same buy-in. A 100-square board gives each square one digit pair and a 1 percent base chance, and it needs 100 entries to reach its full pot. Use 100 squares when the group is large and the party is the point; use 25 when the guest list is short.
Print it or run it online
The printed 10×10 board is the classic option: one page, one pen, one wall. An online pool gives remote players the same view and draws the numbers automatically when the host locks the board. The host enters the score at each period and the winning square is highlighted for everyone. The free plan covers one online pool at a time with up to 100 squares, which matches the board exactly. One credit removes a pool from the free limit and payment tracking for a season of games.