rn1q1bnr/1p2pp1p/2k5/p1Np4/1PpP3B/7b/P1PNPPPP/R2QKB1R w KQ - 1 10
FEN state: rn1q1bnr/1p2pp1p/2k5/p1Np4/1PpP3B/7b/P1PNPPPP/R2QKB1R w KQ - 1 10 ; Best move: b4b5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at e7, black pawn at f7 and black pawn at h7. Black king at c6. Black pawn at a5, white knight at c5 and black pawn at d5. White pawn at b4, black pawn at c4, white pawn at d4 and white bishop at h4. Black bishop at h3. White pawn at a2, white pawn at c2, white knight at d2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 1. Full move number is 10. White to move.