rn4nr/pb1p1pp1/3k1b1p/1p1P4/PP3P2/2p2KP1/6BP/RN4NR w - - 2 21
FEN state: rn4nr/pb1p1pp1/3k1b1p/1p1P4/PP3P2/2p2KP1/6BP/RN4NR w - - 2 21 ; Best move: b1a3
The current state of the chess board is: Black rook at a8, black knight at b8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at d7, black pawn at f7 and black pawn at g7. Black king at d6, black bishop at f6 and black pawn at h6. Black pawn at b5 and white pawn at d5. White pawn at a4, white pawn at b4 and white pawn at f4. Black pawn at c3, white king at f3 and white pawn at g3. White bishop at g2 and white pawn at h2. White rook at a1, white knight at b1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. White to move.