15. Bd4
+---+---+---+---+---+---+---+---+
8 |bR | .|bB | .|bR | .|bK | .|
+---+---+---+---+---+---+---+---+
7 | b.| b | .| | .| b |bB.| b |
+---+---+---+---+---+---+---+---+
6 | | .| | b.| |bN.| b | .|
+---+---+---+---+---+---+---+---+
5 | .| | .| w |bN.| | .| |
+---+---+---+---+---+---+---+---+
4 | | .| w |wB.| | .| | .|
+---+---+---+---+---+---+---+---+
3 | .| |wN.|wB | .| |wN.| |
+---+---+---+---+---+---+---+---+
2 | w |bQ.| | .| | .| w | w.|