rnbq1b1r/1p1k2pp/3p1p2/1pPn4/p3P1P1/B2p1P1P/P4K2/RN1Q1BNR w - - 0 13
FEN state: rnbq1b1r/1p1k2pp/3p1p2/1pPn4/p3P1P1/B2p1P1P/P4K2/RN1Q1BNR w - - 0 13 ; Best move: e4d5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at b7, black king at d7, black pawn at g7 and black pawn at h7. Black pawn at d6 and black pawn at f6. Black pawn at b5, white pawn at c5 and black knight at d5. Black pawn at a4, white pawn at e4 and white pawn at g4. White bishop at a3, black pawn at d3, white pawn at f3 and white pawn at h3. White pawn at a2 and white king at f2. White rook at a1, white knight at b1, white queen 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 13. White to move.