I was playing a blitz game which was not part of a tournament or something but there was some bets, which were not significant at all, just to add some more spice to the game. However at some point I promote a second queen and since we didn't have spare pieces I took a rook which was already out of the game, turned it upside down so it differs from a real rook and me and my opponent agreed to use it as a queen.
However when the time pressure came and due to the fact that when the rook is turned upside down it's not so stable in my attempt to play fast moves I accidentally knocked the rook down. When this happened I lift the rook and put it correctly on the board but this time instead of turning it upside down I put it as an ordinary rook. I think it worth to mention that I didn't press the clock until I thought everything was fixed. However my opponent claimed that because of the fact that I knocked down a piece and also that I put it incorrectly afterwards the game should not count (he was losing at this point) and refused to accept defeat.
From my perspective the things that I would like to know are - is there such a rule that said :
- If you knock down a piece the opponent has the right to invalidate the game
- If you put a piece incorrectly (as mentioned above the rook was used upside down, but after I knocked it down I pick it up and put it as an ordinary rook) the opponent has the right to invalidate the game
- Based on the facts that I described is there something that can justify invalidating the game?