28 January 2019

• 16:5116:51, 28 January 2019 diff hist −2,186 1996 USAMO Problems/Problem 1 →Solution 3 (Very long and detailed)

20 June 2018

• 16:4216:42, 20 June 2018 diff hist +1,472 1975 Canadian MO Problems/Problem 2 →Solution current

22 August 2017

• 16:5016:50, 22 August 2017 diff hist +13 m 1983 IMO Problems/Problem 6 →Solution 1
• 16:4916:49, 22 August 2017 diff hist +2 m 1983 IMO Problems/Problem 6 →Solution 1

15 August 2017

• 22:1922:19, 15 August 2017 diff hist +2,186 1996 USAMO Problems/Problem 1 →Solution

11 August 2017

• 21:5021:50, 11 August 2017 diff hist −7 m 2006 AMC 12B Problems/Problem 15 →Solution
• 21:5021:50, 11 August 2017 diff hist 0 m 2006 AMC 12B Problems/Problem 15 →Solution
• 21:4921:49, 11 August 2017 diff hist +8 m 2006 AMC 12B Problems/Problem 15 →Solution 2
• 20:4220:42, 11 August 2017 diff hist 0 m 2004 AMC 10B Problems/Problem 25 →Solution

12 July 2017

• 22:5222:52, 12 July 2017 diff hist +31 m 2014 AMC 10A Problems/Problem 16 →Solution 4