r2k1b1r/p1q2pp1/2pppn1p/2p5/n3PPP1/1BP4P/1P1PR3/RNBK2N1 w - - 0 20
FEN state: r2k1b1r/p1q2pp1/2pppn1p/2p5/n3PPP1/1BP4P/1P1PR3/RNBK2N1 w - - 0 20 ; Best move: b3a4
The current state of the chess board is: Black rook at a8, black king at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black queen at c7, black pawn at f7 and black pawn at g7. Black pawn at c6, black pawn at d6, black pawn at e6, black knight at f6 and black pawn at h6. Black pawn at c5. Black knight at a4, white pawn at e4, white pawn at f4 and white pawn at g4. White bishop at b3, white pawn at c3 and white pawn at h3. White pawn at b2, white pawn at d2 and white rook at e2. White rook at a1, white knight at b1, white bishop at c1, white king at d1 and white knight at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. White to move.