r1b4r/p3k2p/n2pN1pn/1pp5/1P3p1P/6P1/PBP1P1R1/R1KQ1B2 w - - 2 20
FEN state: r1b4r/p3k2p/n2pN1pn/1pp5/1P3p1P/6P1/PBP1P1R1/R1KQ1B2 w - - 2 20 ; Best move: e6f4
The current state of the chess board is: Black rook at a8, black bishop at c8 and black rook at h8. Black pawn at a7, black king at e7 and black pawn at h7. Black knight at a6, black pawn at d6, white knight at e6, black pawn at g6 and black knight at h6. Black pawn at b5 and black pawn at c5. White pawn at b4, black pawn at f4 and white pawn at h4. White pawn at g3. White pawn at a2, white bishop at b2, white pawn at c2, white pawn at e2 and white rook at g2. White rook at a1, white king at c1, white queen at d1 and white bishop at f1. Both players have exhausted their castles. Half move number is 2. Full move number is 20. White to move.