1rb4r/pp1pk2p/3b1pp1/q1p1p2n/1P3P1R/RPP5/3PPKP1/1NBQ1BN1 w - - 0 13
FEN state: 1rb4r/pp1pk2p/3b1pp1/q1p1p2n/1P3P1R/RPP5/3PPKP1/1NBQ1BN1 w - - 0 13 ; Best move: a3a5
The current state of the chess board is: Black rook at b8, black bishop at c8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at d7, black king at e7 and black pawn at h7. Black bishop at d6, black pawn at f6 and black pawn at g6. Black queen at a5, black pawn at c5, black pawn at e5 and black knight at h5. White pawn at b4, white pawn at f4 and white rook at h4. White rook at a3, white pawn at b3 and white pawn at c3. White pawn at d2, white pawn at e2, white king at f2 and white pawn at g2. White knight at b1, white bishop at c1, white queen at d1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 13. White to move.