At the 2006World Series of Poker Chen won two events, a $3,000 limit Texas hold 'em event with a prize of $343,618, and a $2,500 no limit hold 'em short-handed event with a prize of $442,511.[4][5] Prior to these events Chen's largest tournament win was for $41,600 at a no limit hold 'em event at the Bicycle Casino's Legends of Poker in 2000.[6]
Chen has been a longtime participant[7] in the rec.gambling.poker newsgroup and its B.A.R.G.E offshoot. He has also been a member of Team PokerStars.[8]
With Jerrod Ankenman, Chen coauthored The Mathematics of Poker, an introduction to quantitative techniques and game theory as applied to poker.
In February 2009, he appeared on Poker After Dark's "Brilliant Minds" week, finishing in 5th place after his A♦3♦ lost to Jimmy Warren's A♠A♥ after Chen pushed all-in on a flop of A♣3♣Q♦.[9]
As of 2017, his total live tournament winnings exceed $1,900,000.[2] His 38 cashes at the WSOP account for over $1,725,000 of those winnings.[1]