Dealt four deuces — hold all five cards or just the four 2s?
Either. On 25/15/9/5 Deuces Wild four deuces pay 200 per coin whatever the fifth card is, so holding the four 2s and holding all five are both worth exactly 200.0000 — and the trainer grades both as correct.
The exact numbers — 2♣ 2♦ 2♥ 2♠ 9♣
EVs are exact — every possible draw enumerated, not simulated — at max bet on 25/15/9/5 Deuces Wild. Check it yourself: the analyzer runs the same solver in your browser.
See all 32 holds of this hand ranked →Why
Four deuces is its own 200-coin row on the pay table, above everything but the natural royal, and no draw can change it: every five-card hand that contains four deuces is paid as four deuces, so the fifth card can neither add nor subtract. Drawing one costs nothing (whatever arrives, the hand is still four deuces and still pays 200) and gains nothing. The hold that costs money is the one players reach for by habit on other games: keeping a 'kicker' with trips. Here that means letting go of a deuce, and the three remaining 2s are worth 6.8076 — a 193-coin mistake. The chart's first line says hold the four 2s because that is the habit worth building: a deuce is never discarded in this game, and the fifth card is never the point.
Chart line #1 of 33 — 'Four deuces — hold the four 2s (the fifth card changes nothing)'. The grading is by EV, so both 200-coin holds are correct; only a hold that releases a deuce is a mistake. See the full solver-optimized strategy chart, or drill hands with exact-EV feedback until plays like this are automatic.