If a player plays a doubleduring play, they must then play another domino somewhere on the board -their train, the Mexican train, or a marked train. If a play is able,they may play doubles in more than one spot - on their train, the Mexicantrain, or a marked train. Even though two or more doubleshave been played, only one additional domino must be placed somewhere onthe board. If a player cannot follow-up the double with another domino,they draw and Rule #9 is followed. EXCEPTION: A PLAYER MAY GOOUT WITH A DOUBLE WITHOUT HAVING TO PLAY ANOTHER DOMINO.
When a player cannot playon their own train, the Mexican train or a marked train of anotherplayer, then they draw a domino from the boneyard. If they cannot playthat domino on the board, then they place a marker on the last domino oftheir train (penny or other marker). All players may then play on thisplayers train as their turn arrives. If this player can playanywhere on the board at their next turn, the marker is then removed andno other player may play on that train.
Having the best strategy will be an advantage in playing this game and likewise avoiding penalties incurred to avoid deductions on points made. Having strategies and avoiding penalties will give the best chances of winning the round. This is just how simple playing Mexican train dominoes are made.