r2k1bnr/nb2p1pp/ppP5/3p1P2/8/6pP/1BP1P3/qN1K1BNR w - - 0 21
FEN state: r2k1bnr/nb2p1pp/ppP5/3p1P2/8/6pP/1BP1P3/qN1K1BNR w - - 0 21 ; Best move: b2a1
The current state of the chess board is: Black rook at a8, black king at d8, black bishop at f8, black knight at g8 and black rook at h8. Black knight at a7, black bishop at b7, black pawn at e7, black pawn at g7 and black pawn at h7. Black pawn at a6, black pawn at b6 and white pawn at c6. Black pawn at d5 and white pawn at f5. Black pawn at g3 and white pawn at h3. White bishop at b2, white pawn at c2 and white pawn at e2. Black queen at a1, white knight at b1, white king at d1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.