Insert Fens - Insert a FEN, get a new (or its existing) ID number
Insert blunders - Insert a blunder's (or missed opportunities) fen ID, how many points were lost etc.
List fens - List fens if you want to
Insert FEN, then list FENs to get FEN ID, then insert blunder information associated with that FEN. After that, the information will be in Blunder training.
See the documentation web page for more detail. Read the INSTALL file in this directory for installation instructions.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.