r3k3/p1pnb2r/n1b1P2p/3p1pp1/pq1P2P1/PPP1P2P/5K1R/R1BQ1BN1 w q - 0 25
FEN state: r3k3/p1pnb2r/n1b1P2p/3p1pp1/pq1P2P1/PPP1P2P/5K1R/R1BQ1BN1 w q - 0 25 ; Best move: c3b4
The current state of the chess board is: Black rook at a8 and black king at e8. Black pawn at a7, black pawn at c7, black knight at d7, black bishop at e7 and black rook at h7. Black knight at a6, black bishop at c6, white pawn at e6 and black pawn at h6. Black pawn at d5, black pawn at f5 and black pawn at g5. Black pawn at a4, black queen at b4, white pawn at d4 and white pawn at g4. White pawn at a3, white pawn at b3, white pawn at c3, white pawn at e3 and white pawn at h3. White king at f2 and white rook at h2. White rook at a1, white bishop at c1, white queen at d1, white bishop at f1 and white knight at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 25. White to move.