r3k1r1/2pq2p1/2nbbp1p/p2Pp3/Pp6/1PP2B2/3PN1PP/RNBQ1K1R w - - 10 21
FEN state: r3k1r1/2pq2p1/2nbbp1p/p2Pp3/Pp6/1PP2B2/3PN1PP/RNBQ1K1R w - - 10 21 ; Best move: d5e6
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at g8. Black pawn at c7, black queen at d7 and black pawn at g7. Black knight at c6, black bishop at d6, black bishop at e6, black pawn at f6 and black pawn at h6. Black pawn at a5, white pawn at d5 and black pawn at e5. White pawn at a4 and black pawn at b4. White pawn at b3, white pawn at c3 and white bishop at f3. White pawn at d2, white knight at e2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 10. Full move number is 21. White to move.