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MSISK / HTML-TableExtract-2.13 / t / gnarly.html 
<html><head><title>gnarly table</title></head><body><table border=1><tr><td colspan=4 rowspan=1>(0,0) [1,4]</td><td colspan=4 rowspan=2>(0,1) [2,4]</td></tr><tr><td colspan=1 rowspan=2>(1,0) [2,1]</td><td colspan=1 rowspan=1>(1,1) [1,1]</td><td colspan=2 rowspan=1>(1,2) [1,2]</td></tr><tr><td colspan=4 rowspan=2>(2,0) [2,4]</td><td colspan=2 rowspan=2>(2,1) [2,2]</td><td colspan=1 rowspan=1>(2,2) [1,1]</td></tr><tr><td colspan=1 rowspan=1>(3,0) [1,1]</td><td colspan=1 rowspan=1>(3,1) [1,1]</td></tr><tr><td colspan=2 rowspan=3>(4,0) [3,2]</td><td colspan=1 rowspan=1>(4,1) [1,1]</td><td colspan=1 rowspan=3>(4,2) [3,1]</td><td colspan=4 rowspan=4>(4,3) [4,4]</td></tr><tr><td colspan=1 rowspan=1>(5,0) [1,1]</td></tr><tr><td colspan=1 rowspan=1>(6,0) [1,1]</td></tr><tr><td colspan=4 rowspan=1>(7,0) [1,4]</td></tr></table></body></html>