In limited overs cricket, the team batting first posts a target score for the team batting second to achieve in order to win the match. The team batting second is constrained by decreasing resources in terms of number of balls left and number of wickets in hand in the process of reaching the target as the second innings progresses. The Pressure Index, a measure created by researchers in the past, serves as a tool for quantifying the level of pressure that a team batting second encounters in limited overs cricket. Through a ball-by-ball analysis of the second innings, it reveals how effectively the team batting second in a limited-over game proceeds towards their target. This research employs higher order Markov chains to examine the strategies employed by successful teams during run chases in Twenty20 matches. By studying the trends in successful run chases spanning over 16 years and utilizing a significant dataset of 6537 Twenty20 matches, specific strategies are identified. Consequently, an efficient approach to successful run chases in Twenty20 cricket is formulated, effectively limiting the Pressure Index to [0.5, 3.5] or even further down under 0.5 as early as possible. The innovative methodology adopted in this research offers valuable insights for cricket teams looking to enhance their performance in run chases.

翻译：在有限轮板球比赛中，先击球方会设定一个目标分数，后击球方需达成此分数才能赢得比赛。随着第二局比赛的进行，后击球方在达成目标的过程中会受到剩余球数和手中三柱门数量等资源逐渐减少的限制。压力指数作为过往研究者创建的一种度量工具，可用于量化有限轮板球比赛中后击球方面临的压力水平。通过对第二局比赛的逐球分析，该指数揭示了有限轮比赛中后击球方向目标推进的有效程度。本研究采用高阶马尔可夫链来考察二十20比赛中成功队伍在跑分追逐过程中采用的策略。通过分析跨越16年的成功跑分追逐趋势，并利用包含6537场二十20比赛的大型数据集，本研究识别出特定策略。由此，我们构建了一种在二十20板球比赛中实现成功跑分追逐的高效方法，该方法能尽早将压力指数有效限制在[0.5, 3.5]区间内，甚至进一步降至0.5以下。本研究采用的创新方法论为寻求提升跑分追逐表现的板球队提供了宝贵的见解。