| Number | Name | Date | Kind |
|---|---|---|---|
| 1679652 | Dalrymple | Aug 1928 | |
| 3610626 | Nolte | Oct 1971 | |
| 4244579 | Campos | Jan 1981 | |
| 4373731 | Whiteman et al. | Feb 1983 | |
| 4415160 | Lamb | Nov 1983 | |
| 4687206 | Cordry et al. | Aug 1987 | |
| 4927157 | Riihiluoma et al. | May 1990 | |
| 4982965 | Dozorsky | Jan 1991 | |
| 5150908 | Codinha | Sep 1992 |
| Number | Date | Country |
|---|---|---|
| 886460 | Oct 1943 | FRX |
| 2002640 | Feb 1979 | GBX |
| 2070446 | Sep 1981 | GBX |
| Entry |
|---|
| "Shahmot" Britton Enterprises, advertizement in Games Magazine, Dec., 1993, vol. 17 No. 6, p. 71. |
| "Superchess", Green Island Games Co., 1993. |