r3k1nr/pRpb1q2/3b3p/1pnp1pP1/P2P1pP1/R1P1B3/1PQ1PK2/1N3BN1 w - - 6 20
FEN state: r3k1nr/pRpb1q2/3b3p/1pnp1pP1/P2P1pP1/R1P1B3/1PQ1PK2/1N3BN1 w - - 6 20 ; Best move: g5g6
The current state of the chess board is: Black rook at a8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, white rook at b7, black pawn at c7, black bishop at d7 and black queen at f7. Black bishop at d6 and black pawn at h6. Black pawn at b5, black knight at c5, black pawn at d5, black pawn at f5 and white pawn at g5. White pawn at a4, white pawn at d4, black pawn at f4 and white pawn at g4. White rook at a3, white pawn at c3 and white bishop at e3. White pawn at b2, white queen at c2, white pawn at e2 and white king at f2. White knight at b1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 6. Full move number is 20. White to move.