r1bq1bnr/p1pk2p1/n7/3ppp2/pPPP1B2/4PKp1/P4P1P/R2Q1BNR w - - 0 12
FEN state: r1bq1bnr/p1pk2p1/n7/3ppp2/pPPP1B2/4PKp1/P4P1P/R2Q1BNR w - - 0 12 ; Best move: d1a4
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 c7, black king at d7 and black pawn at g7. Black knight at a6. Black pawn at d5, black pawn at e5 and black pawn at f5. Black pawn at a4, white pawn at b4, white pawn at c4, white pawn at d4 and white bishop at f4. White pawn at e3, white king at f3 and black pawn at g3. White pawn at a2, white pawn at f2 and white pawn at h2. White rook at a1, 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 12. White to move.