r2qk2r/2p1p2p/5b1n/pp6/1Q3pP1/P1PBp3/1P1P1PbP/RNB1K3 w Qk - 2 21
FEN state: r2qk2r/2p1p2p/5b1n/pp6/1Q3pP1/P1PBp3/1P1P1PbP/RNB1K3 w Qk - 2 21 ; Best move: b4b5
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black rook at h8. Black pawn at c7, black pawn at e7 and black pawn at h7. Black bishop at f6 and black knight at h6. Black pawn at a5 and black pawn at b5. White queen at b4, black pawn at f4 and white pawn at g4. White pawn at a3, white pawn at c3, white bishop at d3 and black pawn at e3. White pawn at b2, white pawn at d2, white pawn at f2, black bishop at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1 and white king at e1. White queenside and black kingside castles are available. Half move number is 2. Full move number is 21. White to move.