rnb1kbn1/2pp1p2/p1rq4/1p2P1p1/1PQP3p/2P2KP1/P3P2P/RNB2BNR w q - 1 13
FEN state: rnb1kbn1/2pp1p2/p1rq4/1p2P1p1/1PQP3p/2P2KP1/P3P2P/RNB2BNR w q - 1 13 ; Best move: e5d6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at c7, black pawn at d7 and black pawn at f7. Black pawn at a6, black rook at c6 and black queen at d6. Black pawn at b5, white pawn at e5 and black pawn at g5. White pawn at b4, white queen at c4, white pawn at d4 and black pawn at h4. White pawn at c3, white king at f3 and white pawn at g3. White pawn at a2, white pawn at e2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 13. White to move.