1rb2rk1/ppppqp2/3np1pp/8/R1PP1PPP/NQb1R3/P2PB1K1/2B3N1 w - - 15 21
FEN state: 1rb2rk1/ppppqp2/3np1pp/8/R1PP1PPP/NQb1R3/P2PB1K1/2B3N1 w - - 15 21 ; Best move: b3c3
The current state of the chess board is: Black rook at b8, black bishop at c8, black rook at f8 and black king at g8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at d7, black queen at e7 and black pawn at f7. Black knight at d6, black pawn at e6, black pawn at g6 and black pawn at h6. White rook at a4, white pawn at c4, white pawn at d4, white pawn at f4, white pawn at g4 and white pawn at h4. White knight at a3, white queen at b3, black bishop at c3 and white rook at e3. White pawn at a2, white pawn at d2, white bishop at e2 and white king at g2. White bishop at c1 and white knight at g1. Both players have exhausted their castles. Half move number is 15. Full move number is 21. White to move.