rn1qkbn1/2pbp1pr/pp3p1p/1P1p4/2P1P1P1/N7/P2PKP1P/1RBQ1BNR b - - 4 10
FEN state: rn1qkbn1/2pbp1pr/pp3p1p/1P1p4/2P1P1P1/N7/P2PKP1P/1RBQ1BNR b - - 4 10 ; Best move: d5e4
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at c7, black bishop at d7, black pawn at e7, black pawn at g7 and black rook at h7. Black pawn at a6, black pawn at b6, black pawn at f6 and black pawn at h6. White pawn at b5 and black pawn at d5. White pawn at c4, white pawn at e4 and white pawn at g4. White knight at a3. White pawn at a2, white pawn at d2, white king at e2, white pawn at f2 and white pawn at h2. White rook at b1, white bishop at c1, white queen at d1, white bishop 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 10. Black to move.