1r2k2r/2p1Nnpp/p4p2/2n5/1P2p3/B1bPP1P1/b2P2BR/R2Q2K1 w k - 4 25
FEN state: 1r2k2r/2p1Nnpp/p4p2/2n5/1P2p3/B1bPP1P1/b2P2BR/R2Q2K1 w k - 4 25 ; Best move: a1a2
The current state of the chess board is: Black rook at b8, black king at e8 and black rook at h8. Black pawn at c7, white knight at e7, black knight at f7, black pawn at g7 and black pawn at h7. Black pawn at a6 and black pawn at f6. Black knight at c5. White pawn at b4 and black pawn at e4. White bishop at a3, black bishop at c3, white pawn at d3, white pawn at e3 and white pawn at g3. Black bishop at a2, white pawn at d2, white bishop at g2 and white rook at h2. White rook at a1, white queen at d1 and white king at g1. Black kingside is the only castle move available. Half move number is 4. Full move number is 25. White to move.