rn3rk1/3b2b1/pqP1pp2/1p1p2p1/3Q1PPn/P3B3/NPP1P2N/R3KBR1 w Q - 9 20
FEN state: rn3rk1/3b2b1/pqP1pp2/1p1p2p1/3Q1PPn/P3B3/NPP1P2N/R3KBR1 w Q - 9 20 ; Best move: d4b6
The current state of the chess board is: Black rook at a8, black knight at b8, black rook at f8 and black king at g8. Black bishop at d7 and black bishop at g7. Black pawn at a6, black queen at b6, white pawn at c6, black pawn at e6 and black pawn at f6. Black pawn at b5, black pawn at d5 and black pawn at g5. White queen at d4, white pawn at f4, white pawn at g4 and black knight at h4. White pawn at a3 and white bishop at e3. White knight at a2, white pawn at b2, white pawn at c2, white pawn at e2 and white knight at h2. White rook at a1, white king at e1, white bishop at f1 and white rook at g1. White queenside is the only castle move available. Half move number is 9. Full move number is 20. White to move.