rnb1qb1r/2pp2p1/1p2k2p/p3pp1P/P2PnP2/NP3BP1/2P5/R1BQ1KNR w - - 1 13
FEN state: rnb1qb1r/2pp2p1/1p2k2p/p3pp1P/P2PnP2/NP3BP1/2P5/R1BQ1KNR w - - 1 13 ; Best move: a3b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at e8, black bishop at f8 and black rook at h8. Black pawn at c7, black pawn at d7 and black pawn at g7. Black pawn at b6, black king at e6 and black pawn at h6. Black pawn at a5, black pawn at e5, black pawn at f5 and white pawn at h5. White pawn at a4, white pawn at d4, black knight at e4 and white pawn at f4. White knight at a3, white pawn at b3, white bishop at f3 and white pawn at g3. White pawn at c2. White rook at a1, white bishop at c1, white queen at d1, white king at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 13. White to move.