1r2kr2/p1q1ppbp/npp2n2/1P1p2p1/3PN3/P1B1P3/2P2PPP/1R1QKBNR w K - 1 13
FEN state: 1r2kr2/p1q1ppbp/npp2n2/1P1p2p1/3PN3/P1B1P3/2P2PPP/1R1QKBNR w K - 1 13 ; Best move: e4f6
The current state of the chess board is: Black rook at b8, black king at e8 and black rook at f8. Black pawn at a7, black queen at c7, black pawn at e7, black pawn at f7, black bishop at g7 and black pawn at h7. Black knight at a6, black pawn at b6, black pawn at c6 and black knight at f6. White pawn at b5, black pawn at d5 and black pawn at g5. White pawn at d4 and white knight at e4. White pawn at a3, white bishop at c3 and white pawn at e3. White pawn at c2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at b1, white queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 13. White to move.