r1bq1bnr/ppp1kp2/n2pp2p/8/1P2P1p1/3PK3/P1P2PPP/RNBQ1BNR w - - 0 10
FEN state: r1bq1bnr/ppp1kp2/n2pp2p/8/1P2P1p1/3PK3/P1P2PPP/RNBQ1BNR w - - 0 10 ; Best move: a2a3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black king at e7 and black pawn at f7. Black knight at a6, black pawn at d6, black pawn at e6 and black pawn at h6. White pawn at b4, white pawn at e4 and black pawn at g4. White pawn at d3 and white king at e3. White pawn at a2, white pawn at c2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 10. White to move.