r4b2/p1pkp1pr/Q2p3n/2PN1P1p/1q6/2N1P1P1/3P3R/R1B1K3 w Q - 0 23
FEN state: r4b2/p1pkp1pr/Q2p3n/2PN1P1p/1q6/2N1P1P1/3P3R/R1B1K3 w Q - 0 23 ; Best move: d5b4
The current state of the chess board is: Black rook at a8 and black bishop at f8. Black pawn at a7, black pawn at c7, black king at d7, black pawn at e7, black pawn at g7 and black rook at h7. White queen at a6, black pawn at d6 and black knight at h6. White pawn at c5, white knight at d5, white pawn at f5 and black pawn at h5. Black queen at b4. White knight at c3, white pawn at e3 and white pawn at g3. White pawn at d2 and white rook at h2. White rook at a1, white bishop at c1 and white king at e1. White queenside is the only castle move available. Half move number is 0. Full move number is 23. White to move.