Abu Dhabi: West Indies, set a target of 456 to win, closed the fourth day of the second Test against Pakistan on 171-4 in Abu Dhabi on Monday.
Jermaine Blackwood (41) and Roston Chase (17) were at the crease with West Indies needing a further 285 runs to win or bat out the final day for a draw.
Opener Kraigg Brathwaite top-scored with 67. Leg-spinner Yasir Shah has figures of 2-60.
Pakistan had declared their second innings on 227-2 soon after lunch with Azhar Ali scoring 79 and Asad Shafi1 58 not out.
Pakistan lead the three-match series 1-0 after winning the first Test by 56 runs in Dubai.
The third and final Test starts in Sharjah from October 30.
Pakistan - 452 (Younis 127, Misbah 96, Gabriel 5-96) and 227 for 2 dec (Azhar 79, Shafiq 58*, Aslam 50)
West Indies - 224 (Yasir Shah 4-86, Rahat 3-45) and 171 for 4 (Brathwaite 67)
Status - West Indies required 285 runs to win