2r1kbn1/1b1n2p1/2p4r/pq2N3/PP1pPpPB/7P/1RP2PB1/3K2NR w - - 4 21
FEN state: 2r1kbn1/1b1n2p1/2p4r/pq2N3/PP1pPpPB/7P/1RP2PB1/3K2NR w - - 4 21 ; Best move: a4b5
The current state of the chess board is: Black rook at c8, black king at e8, black bishop at f8 and black knight at g8. Black bishop at b7, black knight at d7 and black pawn at g7. Black pawn at c6 and black rook at h6. Black pawn at a5, black queen at b5 and white knight at e5. White pawn at a4, white pawn at b4, black pawn at d4, white pawn at e4, black pawn at f4, white pawn at g4 and white bishop at h4. White pawn at h3. White rook at b2, white pawn at c2, white pawn at f2 and white bishop at g2. White king at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 21. White to move.