rnb5/3pbp2/3k1n1r/pp4pp/2P2Pq1/K1NpB2N/PP2P1BP/R5R1 w - - 0 21
FEN state: rnb5/3pbp2/3k1n1r/pp4pp/2P2Pq1/K1NpB2N/PP2P1BP/R5R1 w - - 0 21 ; Best move: c3b5
The current state of the chess board is: Black rook at a8, black knight at b8 and black bishop at c8. Black pawn at d7, black bishop at e7 and black pawn at f7. Black king at d6, black knight at f6 and black rook at h6. Black pawn at a5, black pawn at b5, black pawn at g5 and black pawn at h5. White pawn at c4, white pawn at f4 and black queen at g4. White king at a3, white knight at c3, black pawn at d3, white bishop at e3 and white knight at h3. White pawn at a2, white pawn at b2, white pawn at e2, white bishop at g2 and white pawn at h2. White rook at a1 and white rook at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.