rn2q1nr/p1ppppk1/b4b1p/4Q3/PpP2P1P/1P4pN/3PP1P1/RNB1KB1R w - - 0 13
FEN state: rn2q1nr/p1ppppk1/b4b1p/4Q3/PpP2P1P/1P4pN/3PP1P1/RNB1KB1R w - - 0 13 ; Best move: e5d5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at e8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at d7, black pawn at e7, black pawn at f7 and black king at g7. Black bishop at a6, black bishop at f6 and black pawn at h6. White queen at e5. White pawn at a4, black pawn at b4, white pawn at c4, white pawn at f4 and white pawn at h4. White pawn at b3, black pawn at g3 and white knight at h3. White pawn at d2, white pawn at e2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 13. White to move.