rnr5/pk2b3/1pq2n2/1b2pPBp/1P6/P4N1P/2P2PP1/RQ2KR2 w Q - 1 20
FEN state: rnr5/pk2b3/1pq2n2/1b2pPBp/1P6/P4N1P/2P2PP1/RQ2KR2 w Q - 1 20 ; Best move: b1b3
The current state of the chess board is: Black rook at a8, black knight at b8 and black rook at c8. Black pawn at a7, black king at b7 and black bishop at e7. Black pawn at b6, black queen at c6 and black knight at f6. Black bishop at b5, black pawn at e5, white pawn at f5, white bishop at g5 and black pawn at h5. White pawn at b4. White pawn at a3, white knight at f3 and white pawn at h3. White pawn at c2, white pawn at f2 and white pawn at g2. White rook at a1, white queen at b1, white king at e1 and white rook at f1. White queenside is the only castle move available. Half move number is 1. Full move number is 20. White to move.