r1b3nr/p1p1p3/n1k1q1Pp/1p1p1p2/1P1b1P2/4P1PN/P1P1B3/RNBQK1R1 b Q - 3 17
FEN state: r1b3nr/p1p1p3/n1k1q1Pp/1p1p1p2/1P1b1P2/4P1PN/P1P1B3/RNBQK1R1 b Q - 3 17 ; Best move: d4a1
The current state of the chess board is: Black rook at a8, black bishop at c8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7 and black pawn at e7. Black knight at a6, black king at c6, black queen at e6, white pawn at g6 and black pawn at h6. Black pawn at b5, black pawn at d5 and black pawn at f5. White pawn at b4, black bishop at d4 and white pawn at f4. White pawn at e3, white pawn at g3 and white knight at h3. White pawn at a2, white pawn at c2 and white bishop at e2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1 and white rook at g1. White queenside is the only castle move available. Half move number is 3. Full move number is 17. Black to move.