r4br1/p2q1p1p/1RnN1k1n/3ppP2/4P1p1/1N5P/P1PPQKP1/2B4R w - - 4 21
FEN state: r4br1/p2q1p1p/1RnN1k1n/3ppP2/4P1p1/1N5P/P1PPQKP1/2B4R w - - 4 21 ; Best move: b6a6
The current state of the chess board is: Black rook at a8, black bishop at f8 and black rook at g8. Black pawn at a7, black queen at d7, black pawn at f7 and black pawn at h7. White rook at b6, black knight at c6, white knight at d6, black king at f6 and black knight at h6. Black pawn at d5, black pawn at e5 and white pawn at f5. White pawn at e4 and black pawn at g4. White knight at b3 and white pawn at h3. White pawn at a2, white pawn at c2, white pawn at d2, white queen at e2, white king at f2 and white pawn at g2. White bishop at c1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 21. White to move.