1rb1k2r/1p3n1p/4pqpP/1Ppp2b1/Q3Pp2/BnNB3N/P1PP1PPK/R4R2 w k - 6 21
FEN state: 1rb1k2r/1p3n1p/4pqpP/1Ppp2b1/Q3Pp2/BnNB3N/P1PP1PPK/R4R2 w k - 6 21 ; Best move: a2b3
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at b7, black knight at f7 and black pawn at h7. Black pawn at e6, black queen at f6, black pawn at g6 and white pawn at h6. White pawn at b5, black pawn at c5, black pawn at d5 and black bishop at g5. White queen at a4, white pawn at e4 and black pawn at f4. White bishop at a3, black knight at b3, white knight at c3, white bishop at d3 and white knight at h3. White pawn at a2, white pawn at c2, white pawn at d2, white pawn at f2, white pawn at g2 and white king at h2. White rook at a1 and white rook at f1. Black kingside is the only castle move available. Half move number is 6. Full move number is 21. White to move.