2b2b2/rp1pp1pr/p5kn/2p4p/NBBPp1qP/R3PN2/1P3PP1/n2K2R1 w - - 12 21
FEN state: 2b2b2/rp1pp1pr/p5kn/2p4p/NBBPp1qP/R3PN2/1P3PP1/n2K2R1 w - - 12 21 ; Best move: a3a1
The current state of the chess board is: Black bishop at c8 and black bishop at f8. Black rook at a7, black pawn at b7, black pawn at d7, black pawn at e7, black pawn at g7 and black rook at h7. Black pawn at a6, black king at g6 and black knight at h6. Black pawn at c5 and black pawn at h5. White knight at a4, white bishop at b4, white bishop at c4, white pawn at d4, black pawn at e4, black queen at g4 and white pawn at h4. White rook at a3, white pawn at e3 and white knight at f3. White pawn at b2, white pawn at f2 and white pawn at g2. Black knight at a1, white king at d1 and white rook at g1. Both players have exhausted their castles. Half move number is 12. Full move number is 21. White to move.