r3kbr1/5p2/nq1p3p/pPp1p1pP/4bPP1/1P1PP3/n1PBB3/RN1K2NR w q - 1 23
FEN state: r3kbr1/5p2/nq1p3p/pPp1p1pP/4bPP1/1P1PP3/n1PBB3/RN1K2NR w q - 1 23 ; Best move: d3e4
The current state of the chess board is: Black rook at a8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at f7. Black knight at a6, black queen at b6, black pawn at d6 and black pawn at h6. Black pawn at a5, white pawn at b5, black pawn at c5, black pawn at e5, black pawn at g5 and white pawn at h5. Black bishop at e4, white pawn at f4 and white pawn at g4. White pawn at b3, white pawn at d3 and white pawn at e3. Black knight at a2, white pawn at c2, white bishop at d2 and white bishop at e2. White rook at a1, white knight at b1, white king at d1, 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 23. White to move.