OFC Oracle Learning Guide / Updated October 19, 2026

Turn post-game “why?” into your next lesson

How to Use the OFC Solver

Illustration of grassland in soft sunlight and a path leading to hills

Set game conditions and recreate any spot.
From starting analysis to using the results in review.

The screenshots show the Japanese interface: 解析 = Analyze, リセット = Reset, and 通常時 = Normal.

OFC Oracle before analysis: boards and dealt cards on the left, results in the center, and card selection and history on the right.
Before analysis: choose game conditions and enter cards to recreate the spot.

STEP 01Set game conditions

First set the game type and the opponent’s state to match the spot you want to recreate.

1. Game type

Game selection menu: Regular, Progressive, Joker Ultimate

Select the game you played.

  • Regular
  • Progressive
  • Joker Ultimate

Jokers and FL rules vary, so match the rules you actually played.

2. Opponent state

Opponent-state menu: Normal, QQ Fantasy, KK Fantasy, AA Fantasy, Trips Fantasy

Select “Normal” for an opponent playing a normal hand, or the matching FL type for an opponent in Fantasyland.

Available opponent states depend on the game type.
The Joker Ultimate example offers QQ FL, KK FL, AA FL, and Trips FL. Select the state that matches your opponent’s situation.

Selectable states and supported analysis vary by game. If the screen shows a message such as “Coming soon,” follow its guidance.

STEP 02Recreate any spot

Screen with opponent board and dealt cards entered; choose cards from the list on the right.
Select an input area, then choose cards from the card list on the right.

Choose an input field, then select the card you want under “Cards” on the right.
You can also enter cards with the keyboard.

Input areaWhat to recreate
Your boardCards already placed in the top, middle, and bottom rows
Opponent boardOpponent cards visible at that time
Dealt cardsCards whose placement you are deciding
DiscardsCards you had discarded by then

For an opening hand with no visible opponent cards, leave both boards and discards empty and enter five cards under “Dealt cards.”
For a later spot, recreate the boards and dealt cards at that point.

Available analysis spots vary by game and supported state. If the screen shows a message such as “Coming soon,” follow its guidance.

STEP 03Analyze

Screen highlighting the Analyze button beside Dealt cards in the lower left.
Use the outlined “Analyze” button or theEnter keyto start analysis.

Once you have recreated the spot, click “Analyze” or press Enter.
The results appear on the right when calculation finishes.

Use “Reset” to start over with another spot.

STEP 04Review analysis results

After analysis, placement candidates and estimated EV differences appear on the right.
Compare placement candidates and estimated EV differences in the results.

Candidates are listed from highest to lowest EV.
The first candidate is shown as 0. All later candidates show their EV difference from first place.

For example, “−1.000” is estimated to be 1 point lower in EV than first place.
Compare the placements and EV differences with your own choice.

EV is an estimate. Do not judge a placement solely from a small difference.

Frequently asked questions

What if I cannot press Analyze?

Check that the card count fits the recreated spot, no card is entered twice, and the selected game and state support analysis.
Also check on-screen input errors and “Coming soon” notices.

Will a hand with visible opponent cards produce the same result?

Not necessarily.
When recreating an IP spot, also enter the opponent cards visible at that time.
Do not treat analysis that omits visible IP cards as the answer for that spot.

What if my placement is not in the list?

Check the game, deal, and suits.
If “View excluded candidates” appears, check there as well.
Excluded candidates may not be updated with the same calculation budget as the leading candidates.

How should I interpret the first candidate?

It is the placement with the highest estimated EV under the entered conditions.
Because it is an estimate, additional calculation can change the ranking.
Compare candidates with small EV differences to learn other similarly rated placements.

Next, use your own deal to

compare an uncertain opening hand.

Review your placements after play with OFC Oracle.

Opening-hand analysis covered in this article
  • Regular
  • Joker Ultimate
Open opening-hand analysis

For learning and post-game review

OFC Oracle analysis screen showing board card placement and candidates by estimated EV difference.