4kb1r/pbpp2p1/2n2p2/1p2p1Pp/QP1P1P2/B7/P3K2P/RN5R w k - 1 20
FEN state: 4kb1r/pbpp2p1/2n2p2/1p2p1Pp/QP1P1P2/B7/P3K2P/RN5R w k - 1 20 ; Best move: a4d1
The current state of the chess board is: Black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at c7, black pawn at d7 and black pawn at g7. Black knight at c6 and black pawn at f6. Black pawn at b5, black pawn at e5, white pawn at g5 and black pawn at h5. White queen at a4, white pawn at b4, white pawn at d4 and white pawn at f4. White bishop at a3. White pawn at a2, white king at e2 and white pawn at h2. White rook at a1, white knight at b1 and white rook at h1. Black kingside is the only castle move available. Half move number is 1. Full move number is 20. White to move.