Email: evan  [at] evanchen•cc


  •  Résumé

Teaching (OTIS)


  •  Problems
  •  ELMO
  •  For beginners



  •  EGMO book
  •  Napkin (v1.5)
  •  Course notes


  •  Blog
  •  Facebook
  •  Youtube+Twitch



  •  FAQ's
  •  Rec letters

Buy Me a Coffee at

Twitch Solves IMO Shortlist

In early 2020 I created a Twitch stream that I stream on some (but not all) weeks. The series is informally titled Twitch Solves IMO Shortlist.

Content includes:

  • Working on IMO shortlist or other contest problems with other viewers.
  • Twitch chat asking questions about various things
  • Games: metal league StarCraft, AoPS FTW!, Baba Is You, etc. I have a preference for somewhat difficult puzzle games.

I also upload past broadcasts to YouTube.

Twitch schedule

You can find a schedule for the stream, also below. Friday night at 8pm Eastern is the usual time.

Streaming setup

Software used on the stream includes:

Here is a picture of my physical setup (click to enlarge).

Archive of past problems

I take problem requests at the start of each Twitch stream from viewers in exchange for channel points. (Channel points are earned by watching the live streams.)

Ep. 31BAMO 2003/5(youtube)
Ep. 31Brazil 2007/2(youtube)
Ep. 31Karthik Vedula(youtube)
Ep. 30IMO 2020/1(pdf)(tex)(youtube)
Ep. 30IMO 2020/2(pdf)(tex)(youtube)
Ep. 30IMO 2020/3(pdf)(tex)(youtube)
Ep. 30IMO 2020/4(pdf)(tex)(youtube)
Ep. 30IMO 2020/5(pdf)(tex)(youtube)
Ep. 30IMO 2020/6(pdf)(tex)(youtube)
Ep. 29China TST 2019/4/1(pdf)(tex)(youtube)
Ep. 29IMO 1999/4(pdf)(tex)(youtube)
Ep. 29SMO 2020/3(pdf)(tex)(youtube)
Ep. 28CAMO 2019/2(pdf)(tex)(youtube)
Ep. 28IMO 1981/3(pdf)(tex)(youtube)
Ep. 28KoMaL A744(pdf)(tex)(youtube)
Ep. 28SJMO 2020/3(pdf)(tex)(youtube)
Ep. 28SMO 2020/1(pdf)(tex)(youtube)
Ep. 27China TST 2012/1/2(pdf)(tex)(youtube)
Ep. 27IMO 1990/6(pdf)(tex)(youtube)
Ep. 27SMO 2020/4(pdf)(tex)(youtube)
Ep. 27SMO 2020/5(pdf)(tex)(youtube)
Ep. 26Brazil 2017/6(pdf)(tex)(youtube)
Ep. 26CNCM7(youtube)
Ep. 26SJMO 2020/2(pdf)(tex)(youtube)
Ep. 25Iran TST 2019/15(pdf)(tex)(youtube)
Ep. 25MODS 2019/2(pdf)(tex)(youtube)
Ep. 25SIME 2020/13(pdf)(tex)(youtube)
Ep. 24IMO 1988/3(pdf)(tex)(youtube)
Ep. 24Putnam 2019 A5(pdf)(tex)(youtube)
Ep. 24Shortlist 2009 C6(pdf)(tex)(youtube)
Ep. 24Singapore 2019/5(pdf)(tex)(youtube)
Ep. 23Iran 2010/2/6(pdf)(tex)(youtube)
Ep. 23SIME 2020/14(pdf)(tex)(youtube)
Ep. 23Shortlist 2009 C4(pdf)(tex)(youtube)
Ep. 22Croatia TST 2016/2/2(pdf)(tex)(youtube)
Ep. 22SIME 2020/15(pdf)(tex)(youtube)
Ep. 22Shortlist 1990/13(pdf)(tex)(youtube)
Ep. 21IMO 1979/3(pdf)(tex)(youtube)
Ep. 21Mexico 2019/6(pdf)(tex)(youtube)
Ep. 21Shortlist 1996 C6(pdf)(tex)(youtube)
Ep. 20Singapore 2017/J2/2(pdf)(tex)
Ep. 19KJMO 2012/1(pdf)(tex)(youtube)
Ep. 19Romania JBMO TST 2019/3.1(pdf)(tex)(youtube)
Ep. 18Shortlist 2002 C7(pdf)(tex)(youtube)
Ep. 17Shortlist 1981/11(youtube)
Ep. 17Shortlist 2004 G6(pdf)(tex)(youtube)
Ep. 16JMO 2020/1(pdf)(tex)(youtube)
Ep. 16JMO 2020/2(pdf)(tex)(youtube)
Ep. 16JMO 2020/4(pdf)(tex)(youtube)
Ep. 16JMO 2020/6(pdf)(tex)(youtube)
Ep. 16USAMO 2020/1(pdf)(tex)(youtube)
Ep. 16USAMO 2020/2(pdf)(tex)(youtube)
Ep. 16USAMO 2020/3(pdf)(tex)(youtube)
Ep. 16USAMO 2020/4(pdf)(tex)(youtube)
Ep. 16USAMO 2020/5(pdf)(tex)(youtube)
Ep. 16USAMO 2020/6(pdf)(tex)(youtube)
Ep. 15Shortlist 2006 C6(pdf)(tex)(youtube)
Ep. 14AMC 12B 2020/12(youtube)
Ep. 14Iran TST 2018/9(pdf)(tex)(youtube)
Ep. 13Grant Yu(pdf)(tex)(youtube)
Ep. 13IMO 1993/3(pdf)(tex)(youtube)
Ep. 13Iberoamerican 2001(pdf)(tex)(youtube)
Ep. 13Shortlist 2007 N5(pdf)(tex)(youtube)
Ep. 13Taiwan TST 2019/2J/2(pdf)(tex)(youtube)
Ep. 12EGMO 2012/4(pdf)(tex)
Ep. 12India TST 2019/2(pdf)(tex)
Ep. 12Japan 2019/4(pdf)(tex)(youtube)
Ep. 11USEMO 2019/4(pdf)(tex)(youtube)
Ep. 11USEMO 2019/5(pdf)(tex)(youtube)
Ep. 11USEMO 2019/6(pdf)(tex)(youtube)
Ep. 10USEMO 2019/1(pdf)(tex)(youtube)
Ep. 10USEMO 2019/2(pdf)(tex)(youtube)
Ep. 10USEMO 2019/3(pdf)(tex)(youtube)
Ep. 9Shortlist 2004 C5(pdf)(tex)
Ep. 9Shortlist 2012 A2(pdf)(tex)(youtube)
Ep. 8Shortlist 2008 C5(pdf)(tex)(youtube)
Ep. 8Shortlist 2008 G6(pdf)(tex)(youtube)
Ep. 8Shortlist 2009 A1(pdf)(tex)
Ep. 7Shortlist 2004 A2(pdf)(tex)(youtube)
Ep. 7Shortlist 2004 C3(pdf)(tex)(youtube)
Ep. 7Shortlist 2004 G3(pdf)(tex)(youtube)
Ep. 7Shortlist 2004 N2(pdf)(tex)
Ep. 6Shortlist 2005 C1(pdf)(tex)(youtube)
Ep. 6Shortlist 2006 A5(pdf)(tex)(youtube)
Ep. 6Shortlist 2012 G3(pdf)(tex)(youtube)
Ep. 6Twitch Ep6(pdf)(tex)
Ep. 5Shortlist 2004 N1(pdf)(tex)(youtube)
Ep. 5Shortlist 2006 G2(pdf)(tex)(youtube)
Ep. 5Shortlist 2013 A2(pdf)(tex)
Ep. 4Shortlist 2006 A2(pdf)(tex)
Ep. 4Shortlist 2007 G8(pdf)(tex)(youtube)
Ep. 3Shortlist 2005 G3(pdf)(tex)
Ep. 3Shortlist 2007 N4(pdf)(tex)(youtube)
Ep. 2Shortlist 2007 C1(pdf)(tex)
Ep. 2Shortlist 2007 G2(pdf)(tex)(youtube)
Ep. 2Shortlist 2009 C1(pdf)(tex)
Ep. 1Shortlist 2008 N2(pdf)(tex)
Ep. 1Shortlist 2012 C2(pdf)(tex)
Ep. 1Shortlist 2012 G2(pdf)(tex)
Last modified: Tue Oct 13 18:49:42 2020.