Number | Name | Date | Kind |
---|---|---|---|
895875 | Mercer | Aug 1908 | |
1555937 | Billman | Oct 1925 | |
1564746 | Barnard | Dec 1925 | |
1674533 | Templeton | Jun 1928 | |
3531122 | Peebles | Sep 1970 | |
3609886 | Vien | Oct 1971 | |
4138120 | Daitzman | Feb 1979 | |
4468036 | Istrati | Aug 1984 |
Number | Date | Country |
---|---|---|
2654115 | Jun 1977 | DEX |
Entry |
---|
Stephen Krulik, "Problems, Problem Solving, and Strategy Games", pp. 649-652 of Nov. 1977 Mathematics Teacher. |