CONCENTRATION GRIDBENCHMARKS/TARGETS
3×3 grid < 5 sec
4×4 grid < 10 sec
5×5 grid < 15 sec
6×6 grid < 30 sec
7×7 grid < 1 min
8×8 grid < 1.5 min
9×9 grid < 3 mi
10×10 grid < 4 min
12×12 grid < 10 min
14×14 grid < 16 min
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