Sgfmill knows about all general and Go-specific SGF properties defined in FF[4]:
| Id | SGF type | Meaning |
|---|---|---|
| AB | list of Stone | Add Black |
| AE | list of Point | Add Empty |
| AN | SimpleText | Annotation |
| AP | SimpleText:SimpleText | Application |
| AR | list of Point:Point | Arrow |
| AW | list of Stone | Add White |
| B | Move | Black move |
| BL | Real | Black time left |
| BM | Double | Bad move |
| BR | SimpleText | Black rank |
| BT | SimpleText | Black team |
| C | Text | Comment |
| CA | SimpleText | Charset |
| CP | SimpleText | Copyright |
| CR | list of Point | Circle |
| DD | elist of Point | Dim Points |
| DM | Double | Even position |
| DO | None | Doubtful |
| DT | SimpleText | Date |
| EV | SimpleText | Event |
| FF | Number | File format |
| FG | None | Number:SimpleText | Figure |
| GB | Double | Good for Black |
| GC | Text | Game comment |
| GM | Number | Game |
| GN | SimpleText | Game name |
| GW | Double | Good for White |
| HA | Number | Handicap |
| HO | Double | Hotspot |
| IT | None | Interesting |
| KM | Real | Komi |
| KO | None | Ko |
| LB | list of Point:SimpleText | Label |
| LN | list of Point:Point | Line |
| MA | list of Point | Mark |
| MN | Number | Set move number |
| N | SimpleText | Node name |
| OB | Number | Overtime stones left for Black |
| ON | SimpleText | Opening |
| OT | SimpleText | Overtime description |
| OW | Number | Overtime stones left for White |
| PB | SimpleText | Black player name |
| PC | SimpleText | Place |
| PL | Colour | Player to play |
| PM | Number | Print move mode |
| PW | SimpleText | White player name |
| RE | SimpleText | Result |
| RO | SimpleText | Round |
| RU | SimpleText | Rules |
| SL | list of Point | Selected |
| SO | SimpleText | Source |
| SQ | list of Point | Square |
| ST | Number | Style |
| SZ | Number | Size |
| TB | elist of Point | Black territory |
| TE | Double | Tesuji |
| TM | Real | Time limit |
| TR | list of Point | Triangle |
| TW | elist of Point | White territory |
| UC | Double | Unclear position |
| US | SimpleText | User |
| V | Real | Value |
| VW | elist of Point | View |
| W | Move | White move |
| WL | Real | White time left |
| WR | SimpleText | White rank |
| WT | SimpleText | White team |