r1b2bnr/3pp2k/5p1p/pp1Q2p1/1P1B1P2/3Pn2P/q1PNP1PR/RN2KB2 w Q - 0 21
FEN state: r1b2bnr/3pp2k/5p1p/pp1Q2p1/1P1B1P2/3Pn2P/q1PNP1PR/RN2KB2 w Q - 0 21 ; Best move: d5a2
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at d7, black pawn at e7 and black king at h7. Black pawn at f6 and black pawn at h6. Black pawn at a5, black pawn at b5, white queen at d5 and black pawn at g5. White pawn at b4, white bishop at d4 and white pawn at f4. White pawn at d3, black knight at e3 and white pawn at h3. Black queen at a2, white pawn at c2, white knight at d2, white pawn at e2, white pawn at g2 and white rook at h2. White rook at a1, white knight at b1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 0. Full move number is 21. White to move.