1nb1k2B/rp1N4/n1pbp1pp/2q5/QP3N1P/6P1/P2PPP1R/R3KB2 w Q - 4 20
FEN state: 1nb1k2B/rp1N4/n1pbp1pp/2q5/QP3N1P/6P1/P2PPP1R/R3KB2 w Q - 4 20 ; Best move: b4c5
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8 and white bishop at h8. Black rook at a7, black pawn at b7 and white knight at d7. Black knight at a6, black pawn at c6, black bishop at d6, black pawn at e6, black pawn at g6 and black pawn at h6. Black queen at c5. White queen at a4, white pawn at b4, white knight at f4 and white pawn at h4. White pawn at g3. White pawn at a2, white pawn at d2, white pawn at e2, white pawn at f2 and white rook at h2. White rook at a1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 4. Full move number is 20. White to move.