r3k3/pppn1p1r/3p1q1n/4pPpp/Pb6/4Q3/1PPP1PPP/RNBK1BNR w q - 1 13
FEN state: r3k3/pppn1p1r/3p1q1n/4pPpp/Pb6/4Q3/1PPP1PPP/RNBK1BNR w q - 1 13 ; Best move: e3e4
The current state of the chess board is: Black rook at a8 and black king at e8. Black pawn at a7, black pawn at b7, black pawn at c7, black knight at d7, black pawn at f7 and black rook at h7. Black pawn at d6, black queen at f6 and black knight at h6. Black pawn at e5, white pawn at f5, black pawn at g5 and black pawn at h5. White pawn at a4 and black bishop at b4. White queen at e3. White pawn at b2, white pawn at c2, white pawn at d2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at d1, 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.