rn1qkb2/ppp2ppr/3p3p/1NPbP3/1P6/B4BPP/P3KP2/4RnNR b q - 2 15
FEN state: rn1qkb2/ppp2ppr/3p3p/1NPbP3/1P6/B4BPP/P3KP2/4RnNR b q - 2 15 ; Best move: d5c4
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at f7, black pawn at g7 and black rook at h7. Black pawn at d6 and black pawn at h6. White knight at b5, white pawn at c5, black bishop at d5 and white pawn at e5. White pawn at b4. White bishop at a3, white bishop at f3, white pawn at g3 and white pawn at h3. White pawn at a2, white king at e2 and white pawn at f2. White rook at e1, black knight at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 15. Black to move.