A subset of a larger game tree. For example, a turn can be considered a subgame of the flop. A solver solution with restricted bet sizes can be considered a subgame of the full poker gamespace.
'%20style='transform:%20translate(4px,%204px)%20scale(0.75)'%20fill-rule='evenodd'%20d='m9.5%2023.94%203.2-5.85%202.58-1.38-1.99.38%202.19-5.03-1.31-3.53%204.01%203.1.79%202.84-1.48-.33%201.61%201.15.12.65%201.96%205.36-3.6-1%203.85%202%20.7%201.7h.02l9.53-24a59.9%2059.9%200%200%201-6.01.9l-3.72%2010.56-3.6-10.13c-.83.02-1.66.04-2.52.04l-2.5-.02L9.7%2011.47%205.98.89C3.78.67%201.78.37%200%200l9.43%2023.78.07.16Z'%20clip-rule='evenodd'%20/%3e%3cpath%20fill='%23fff'%20d='M106.75%2013.32c0-.7.14-1.33.42-1.88a3.1%203.1%200%200%201%204.1-1.4c.41.18.74.45.99.78V7.48h1.8v9.38h-1.8v-1.04a2.4%202.4%200%200%201-.93.84c-.4.2-.85.31-1.37.31a3%203%200%200%201-1.62-.45c-.5-.3-.88-.73-1.17-1.28a4.22%204.22%200%200%201-.42-1.92Zm5.52.03c0-.43-.08-.8-.25-1.1-.17-.31-.4-.55-.69-.71a1.8%201.8%200%200%200-.92-.26%201.8%201.8%200%200%200-1.6.96c-.16.3-.25.66-.25%201.08%200%20.43.09.8.26%201.12.17.31.4.55.68.72.29.17.6.26.91.26a1.84%201.84%200%200%200%201.6-.95c.18-.32.26-.69.26-1.12ZM103.65%2010.93c.22-.37.52-.66.88-.87.37-.22.8-.32%201.27-.32v1.86h-.47c-.56%200-.98.13-1.27.4-.28.26-.41.71-.41%201.36v3.5h-1.78V9.84h1.78v1.09ZM92.62%2013.32c0-.7.14-1.33.42-1.88.29-.55.67-.97%201.15-1.27a3.1%203.1%200%200%201%201.63-.44%202.82%202.82%200%200%201%202.32%201.11v-1h1.78v7.02h-1.78v-1.03c-.23.33-.54.6-.95.83-.4.2-.86.31-1.38.31a3%203%200%200%201-1.62-.45c-.48-.3-.86-.73-1.15-1.28a4.23%204.23%200%200%201-.42-1.92Zm5.52.03c0-.43-.08-.8-.25-1.1-.17-.31-.4-.55-.69-.71a1.8%201.8%200%200%200-2.52.7c-.16.3-.25.66-.25%201.08%200%20.43.09.8.26%201.12.17.31.4.55.68.72.29.17.59.26.91.26a1.84%201.84%200%200%200%201.6-.95c.18-.32.26-.69.26-1.12ZM88.36%2015.4h3.13v1.46h-5.14v-1.43l3.06-4.13h-3.05V9.84h5.09v1.43l-3.09%204.13ZM83.9%209c-.31%200-.58-.1-.79-.29-.2-.2-.3-.45-.3-.74%200-.3.1-.55.3-.74.22-.2.48-.3.79-.3.31%200%20.57.1.77.3.21.2.32.44.32.74a1%201%200%200%201-.32.74c-.2.2-.46.3-.77.3Zm.87.84v7.02H83V9.84h1.77ZM81.62%208.02l-2.46%208.84h-2.1l-1.65-6.3-1.73%206.3-2.08.01-2.38-8.85h1.9l1.56%206.86%201.8-6.86h1.97l1.7%206.83%201.56-6.83h1.91ZM60.53%2016.95a4.57%204.57%200%200%201-3.93-2.2c-.4-.69-.6-1.47-.6-2.34a4.46%204.46%200%200%201%204.53-4.52c.83%200%201.6.2%202.28.58a4.46%204.46%200%200%201%202.24%203.94c0%20.87-.2%201.65-.61%202.35-.4.68-.94%201.22-1.63%201.6-.7.4-1.46.59-2.28.59Zm0-1.59c.53%200%201-.11%201.4-.35.4-.25.72-.6.95-1.04.23-.45.34-.97.34-1.56%200-.59-.11-1.1-.34-1.54a2.43%202.43%200%200%200-.95-1.03c-.4-.24-.87-.35-1.4-.35-.53%200-1%20.11-1.42.35-.4.24-.72.58-.95%201.03-.23.44-.34.95-.34%201.54%200%20.6.11%201.11.34%201.56.23.45.55.8.95%201.04.41.24.89.35%201.42.35ZM54.92%208.02v1.43h-2.36v7.4H50.8v-7.4h-2.35V8.02h6.48ZM45.12%2010.68c-.2-.37-.48-.66-.83-.85-.36-.2-.77-.3-1.24-.3-.53%200-1%20.12-1.4.36-.4.24-.72.58-.94%201.01-.23.44-.35.95-.35%201.53%200%20.59.12%201.1.35%201.54.23.44.56.78.97%201.01.41.24.9.36%201.44.36.68%200%201.23-.18%201.66-.53.43-.37.71-.87.85-1.51h-3.04v-1.36h4.78v1.55a4.33%204.33%200%200%201-4.32%203.45%204.3%204.3%200%200%201-4.52-4.51c.01-.87.2-1.65.6-2.34.39-.69.93-1.22%201.61-1.6.7-.4%201.46-.59%202.3-.59%201%200%201.87.25%202.6.74a3.69%203.69%200%200%201%201.52%202.04h-2.04Z'%20/%3e%3c/svg%3e)