r2qk2r/2p2pb1/4p3/pN1pN1pn/p2n4/3P1B1P/1P1BPP1K/Rb1Q2R1 w k - 2 20
FEN state: r2qk2r/2p2pb1/4p3/pN1pN1pn/p2n4/3P1B1P/1P1BPP1K/Rb1Q2R1 w k - 2 20 ; Best move: b5d4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black rook at h8. Black pawn at c7, black pawn at f7 and black bishop at g7. Black pawn at e6. Black pawn at a5, white knight at b5, black pawn at d5, white knight at e5, black pawn at g5 and black knight at h5. Black pawn at a4 and black knight at d4. White pawn at d3, white bishop at f3 and white pawn at h3. White pawn at b2, white bishop at d2, white pawn at e2, white pawn at f2 and white king at h2. White rook at a1, black bishop at b1, white queen at d1 and white rook at g1. Black kingside is the only castle move available. Half move number is 2. Full move number is 20. White to move.