rn1B1br1/2pk1p1p/pp1pp1pn/8/2NP3P/P1P2P2/1P2PPB1/R1K2QNR b - - 4 15
FEN state: rn1B1br1/2pk1p1p/pp1pp1pn/8/2NP3P/P1P2P2/1P2PPB1/R1K2QNR b - - 4 15 ; Best move: d7d8
The current state of the chess board is: Black rook at a8, black knight at b8, white bishop at d8, black bishop at f8 and black rook at g8. Black pawn at c7, black king at d7, black pawn at f7 and black pawn at h7. Black pawn at a6, black pawn at b6, black pawn at d6, black pawn at e6, black pawn at g6 and black knight at h6. White knight at c4, white pawn at d4 and white pawn at h4. White pawn at a3, white pawn at c3 and white pawn at f3. White pawn at b2, white pawn at e2, white pawn at f2 and white bishop at g2. White rook at a1, white king at c1, white queen at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 15. Black to move.