r1bq2kr/2bp2pp/n4p1n/pp2p3/1Bp1P1P1/N2P1P1N/PPP1K2P/R2Q1B1R w - - 3 13
FEN state: r1bq2kr/2bp2pp/n4p1n/pp2p3/1Bp1P1P1/N2P1P1N/PPP1K2P/R2Q1B1R w - - 3 13 ; Best move: b4e1
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at g8 and black rook at h8. Black bishop at c7, black pawn at d7, black pawn at g7 and black pawn at h7. Black knight at a6, black pawn at f6 and black knight at h6. Black pawn at a5, black pawn at b5 and black pawn at e5. White bishop at b4, black pawn at c4, white pawn at e4 and white pawn at g4. White knight at a3, white pawn at d3, white pawn at f3 and white knight at h3. White pawn at a2, white pawn at b2, white pawn at c2, white king at e2 and white pawn at h2. White rook at a1, white queen at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 3. Full move number is 13. White to move.