r1bq1b1r/4n3/p2pk2p/2np4/1pP1P1pP/4KpP1/PP4B1/RNB3R1 w - - 0 21
FEN state: r1bq1b1r/4n3/p2pk2p/2np4/1pP1P1pP/4KpP1/PP4B1/RNB3R1 w - - 0 21 ; Best move: g2f3
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 knight at e7. Black pawn at a6, black pawn at d6, black king at e6 and black pawn at h6. Black knight at c5 and black pawn at d5. Black pawn at b4, white pawn at c4, white pawn at e4, black pawn at g4 and white pawn at h4. White king at e3, black pawn at f3 and white pawn at g3. White pawn at a2, white pawn at b2 and white bishop at g2. White rook at a1, white knight at b1, white bishop at c1 and white rook at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.