Descended from the white stallion of Mars and the rogue black fillyAhaha, herds of wild mindsea horses roam a superfield that enfoldsthe fields of spacetime where humans dwell. Because they can passunharmed through phenomena deadly to humans, it is unsafe to ridethem. However, the horses respond to signals flashed at them. Theycan be trained, and they love to race. No horse has yet beaten thewhite stallion of Mars in a race across the eight planets of theSolar System. Can you find such a champion? There are countlesshorses to choose from, and you can create still more with a carefulbreeding program. Training is the key to making your chosen horse awinner. Many horses show blazing speed on some planets, but you mayhave to explore many strategies before you get your horse to revealits top speed on all of the planets. If your horse can win races onall eight planets without suffering a defeat, it will be ready forthe grueling match race with the white stallion of Mars. You willneed to master additional strategies, including optimal use of theentangling effect, in order to win this final race. If you shouldever sell one of your old champions to make room for a new one, youwill face your former horse in the match race as well.

Only one horse has ever won the Galaxy Crown—the white stallion ofMars, now retired to stud. Can you produce the next galacticchampion? To achieve your goal, you must guide your horse tovictory on eight different worlds, ranging from comets to browndwarfs. Many horses excel at one or more types of terrain, but tomaster all of them is extremely difficult. Begin by looking forhorses that show signs of speed. The performance of the averagehorse will be mediocre no matter what the terrain or whatinstructions you give it. But your instructions will make all thedifference to the best horses. Their speed will range from veryslow—sluglike—to blazing, depending on the signals you send. If youfind a horse with talent that cannot master all worlds despitethorough training, try breeding it with another good horse. Theoffspring tend to be just a little better—or worse—than theirparents. Watch out for the mischievous black filly Ahaha. She mayhelp in your breeding and training efforts—or not. Galacticracehorses come from a deeper level of reality, the realm of themindseas. They roam across the galaxy's stars, moons, planets, andcomets with impunity. According to legend, their breed was createdby the crossing of two mindsea horses—the white stallion of Marsand the black filly Ahah. All of their colors and patterns can bederived from the genes of those two progenitors.

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Race your horse on ninety-nine worlds of the Solar System andconquer them all!

In a future where humanity has colonized the Solar System, spacehorse racing will be a popular sport. Mindsea horses descended fromthe legendary white stallion of Mars will gallop across thesun-drenched craters of Mercury, the dusty red plains of Mars, therings of Saturn. Native to a deeper level of reality from which ourworld and others like it are generated, mindsea horses areunaffected by extremes in temperature, gravitational fields,atmospheric pressure, or caustic chemicals. Because humans are notevolved to function on their level, the horses have no riders.Instead, they are guided by signals flashed to them by theirbackers. In Solar System Derby you will be able to bet on yourfavorite mindsea horse and transmit signals to it in the hope ofmaking it run faster. You can choose a different horse for eachrace, or get to know a few that respond well to your signals.Develop your strategy and try to beat the odds to amass a fortune.Each race begins with a view of the planet where the race is to berun. A pull-down menu lets you review the horses and betting oddsbased on the horse's potential top racing speed. Once you placeyour bet, the race will begin. You will have an opportunity duringeach of three circuits to guide your horse with whip, ease, and letbe buttons. Different strategies work with different horses ondifferent planets.

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Read about the animals and peoples that can evolve inchessboarduniverses.