12 June 2019

• 17:2017:20, 12 June 2019 diff hist +12 m 2012 USAJMO Problems/Problem 5 →Solution 1
• 17:1917:19, 12 June 2019 diff hist −76 2012 USAJMO Problems/Problem 5 →Solution 1
• 17:1817:18, 12 June 2019 diff hist +2,780 2012 USAJMO Problems/Problem 5 →Solutions

31 December 2018

• 01:3101:31, 31 December 2018 diff hist −14 m Expected value →Intermediate
• 01:3001:30, 31 December 2018 diff hist +27 m Expected value →Intermediate

16 February 2018

• 19:1219:12, 16 February 2018 diff hist −4 AMC historical results →AMC 12B
• 19:1119:11, 16 February 2018 diff hist −3 AMC historical results →AMC 10B

15 February 2018

• 20:3620:36, 15 February 2018 diff hist −79 AMC historical results →AMC 10B

12 February 2018

• 10:0310:03, 12 February 2018 diff hist +2 AMC historical results →AMC 10A