rn1k1bn1/1p2pppr/p2p3B/2p4p/Q3b2P/q1PPNPPR/PP6/R3KBN1 b Q - 3 13
FEN state: rn1k1bn1/1p2pppr/p2p3B/2p4p/Q3b2P/q1PPNPPR/PP6/R3KBN1 b Q - 3 13 ; Best move: a3a4
The current state of the chess board is: Black rook at a8, black knight at b8, black king at d8, black bishop at f8 and black knight at g8. Black pawn at b7, black pawn at e7, black pawn at f7, black pawn at g7 and black rook at h7. Black pawn at a6, black pawn at d6 and white bishop at h6. Black pawn at c5 and black pawn at h5. White queen at a4, black bishop at e4 and white pawn at h4. Black queen at a3, white pawn at c3, white pawn at d3, white knight at e3, white pawn at f3, white pawn at g3 and white rook at h3. White pawn at a2 and white pawn at b2. White rook at a1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 3. Full move number is 13. Black to move.