| 1958 | Bansho Tan'in | 6/19 | |
| 1959 | A boring problem | 6/30 | |
| 1960 | [USACO 2022 US Open Contest Bronze] Problem 1. Photoshoot | 1/5 | |
| 1961 | [USACO 2022 US Open Contest Bronze] Problem 2. Counting Liars | 3/7 | |
| 1962 | [USACO 2022 US Open Contest Bronze] Problem 3. Alchemy | 1/1 | |
| 1963 | [USACO 2022 US Open Contest Silver] Problem 1. Visits | 1/1 | |
| 1964 | [USACO 2022 US Open Contest Silver] Problem 2. Subset Equality | 1/1 | |
| 1965 | [USACO 2022 US Open Contest Silver] Problem 3. COW Operations | 1/1 | |
| 1966 | [USACO 2022 US Open Contest Gold] Problem 1. Apple Catching | 1/5 | |
| 1967 | [USACO 2022 US Open Contest Gold] Problem 2. Pair Programming | 1/2 | |
| 1968 | [USACO 2022 US Open Contest Gold] Problem 3. Balancing a Tree | 0/27 | |
| 1969 | [USACO 2022 December Contest Bronze] Problem 1. Cow College | 1/1 | |
| 1970 | [USACO 2022 December Contest Bronze] Problem 2. Feeding the Cows | 1/3 | |
| 1971 | [USACO 2022 December Contest Bronze] Problem 3. Reverse Engineering | 1/3 | |
| 1972 | [USACO 2022 December Contest Silver] Problem 1. Barn Tree | 0/34 | |
| 1973 | [USACO 2022 December Contest Silver] Problem 2. Circular Barn | 1/1 | |
| 1974 | [USACO 2022 December Contest Silver] Problem 3. Range Reconstruction | 0/13 | |
| 1975 | [USACO 2022 December Contest Gold] Problem 1. Bribing Friends | 1/2 | |
| 1976 | [USACO 2022 December Contest Gold] Problem 2. Mountains | 1/1 | |
| 1977 | [USACO 2022 December Contest Gold] Problem 3. Strongest Friendship Group | 1/1 | |
| 1978 | [USACO 2023 January Contest Bronze] Problem 1. Leaders | 2/7 | |
| 1979 | [USACO 2023 January Contest Bronze] Problem 2. Air Cownditioning II | 1/1 | |
| 1980 | [USACO 2023 January Contest Bronze] Problem 3. Moo Operations | 1/5 | |
| 1981 | [USACO 2023 January Contest Silver] Problem 1. Find and Replace | 1/2 | |
| 1982 | [USACO 2023 January Contest Silver] Problem 2. Following Directions | 2/2 | |
| 1983 | [USACO 2023 January Contest Silver] Problem 3. Moo Route | 0/6 | |
| 1984 | [USACO 2023 January Contest Gold] Problem 1. Find and Replace | 1/1 | |
| 1985 | [USACO 2023 January Contest Gold] Problem 2. Lights Off | 1/1 | |
| 1986 | [USACO 2023 January Contest Gold] Problem 3. Moo Route | 1/2 | |
| 1987 | [USACO 2023 February Contest Bronze] Problem 1. Hungry Cow | 1/4 | |
| 1988 | [USACO 2023 February Contest Bronze] Problem 2. Stamp Grid | 1/1 | |
| 1989 | [USACO 2023 February Contest Bronze] Problem 3. Watching Mooloo | 1/2 | |
| 1990 | [USACO 2023 February Contest Silver] Problem 1. Bakery | 1/2 | |
| 1991 | [USACO 2023 February Contest Silver] Problem 2. Cow-libi | 1/3 | |
| 1992 | [USACO 2023 February Contest Silver] Problem 3. Moo Route II | 1/2 | |
| 1993 | [USACO 2023 February Contest Gold] Problem 1. Equal Sum Subarrays | 1/2 | |
| 1994 | [USACO 2023 February Contest Gold] Problem 2. Fertilizing Pastures | 1/1 | |
| 1995 | [USACO 2023 February Contest Gold] Problem 3. Piling Papers | 1/1 | |
| 1996 | [USACO 2023 US Open Contest Bronze] Problem 1. FEB | 1/2 | |
| 1997 | [USACO 2023 US Open Contest Bronze] Problem 2. Moo Language | 0/4 | |
| 1998 | [USACO 2023 US Open Contest Bronze] Problem 3. Rotate and Shift | 0/4 | |
| 1999 | [USACO 2023 US Open Contest Silver] Problem 1. Milk Sum | 0/2 | |
| 2000 | [USACO 2023 US Open Contest Silver] Problem 2. Field Day | 1/1 | |
| 2001 | [USACO 2023 US Open Contest Silver] Problem 3. Pareidolia | 1/1 | |
| 2002 | [USACO 2023 US Open Contest Gold] Problem 1. Custodial Cleanup | 1/1 | |
| 2003 | [USACO 2023 US Open Contest Gold] Problem 2. Pareidolia | 1/1 | |
| 2004 | [USACO 2023 US Open Contest Gold] Problem 3. Tree Merging | 0/4 | |
| 2005 | [USACO 2023 December Contest Bronze] Problem 1. Candy Cane Feast | 1/11 | |
| 2006 | [USACO 2023 December Contest Bronze] Problem 2. Cowntact Tracing 2 | 1/1 | |
| 2007 | [USACO 2023 December Contest Bronze] Problem 3. Farmer John Actually Farms | 1/1 | |