1rbk2n1/1p5r/2p1ppp1/p1n4P/1qBP2P1/bP2PN2/3B1P2/RN2K2R w KQ - 1 20
FEN state: 1rbk2n1/1p5r/2p1ppp1/p1n4P/1qBP2P1/bP2PN2/3B1P2/RN2K2R w KQ - 1 20 ; Best move: a1a3
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at d8 and black knight at g8. Black pawn at b7 and black rook at h7. Black pawn at c6, black pawn at e6, black pawn at f6 and black pawn at g6. Black pawn at a5, black knight at c5 and white pawn at h5. Black queen at b4, white bishop at c4, white pawn at d4 and white pawn at g4. Black bishop at a3, white pawn at b3, white pawn at e3 and white knight at f3. White bishop at d2 and white pawn at f2. White rook at a1, white knight at b1, white king at e1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 1. Full move number is 20. White to move.