r1bq1b1r/1pp1pn1p/p2k4/5pp1/2p5/nBP1PQ2/PP1PKP1P/RNB4R w - - 8 18
FEN state: r1bq1b1r/1pp1pn1p/p2k4/5pp1/2p5/nBP1PQ2/PP1PKP1P/RNB4R w - - 8 18 ; Best move: b1a3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at e7, black knight at f7 and black pawn at h7. Black pawn at a6 and black king at d6. Black pawn at f5 and black pawn at g5. Black pawn at c4. Black knight at a3, white bishop at b3, white pawn at c3, white pawn at e3 and white queen at f3. White pawn at a2, white pawn at b2, white pawn at d2, white king at e2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1 and white rook at h1. Both players have exhausted their castles. Half move number is 8. Full move number is 18. White to move.