r1bqk3/p1p1pn2/R2p2rp/1P2b3/3PNPpp/4P2R/1PPQK1B1/2B3N1 w q - 2 20
FEN state: r1bqk3/p1p1pn2/R2p2rp/1P2b3/3PNPpp/4P2R/1PPQK1B1/2B3N1 w q - 2 20 ; Best move: h3h4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black king at e8. Black pawn at a7, black pawn at c7, black pawn at e7 and black knight at f7. White rook at a6, black pawn at d6, black rook at g6 and black pawn at h6. White pawn at b5 and black bishop at e5. White pawn at d4, white knight at e4, white pawn at f4, black pawn at g4 and black pawn at h4. White pawn at e3 and white rook at h3. White pawn at b2, white pawn at c2, white queen at d2, white king at e2 and white bishop at g2. White bishop at c1 and white knight at g1. Black queenside is the only castle move available. Half move number is 2. Full move number is 20. White to move.