15 systems · Monte Carlo

Select up to two lottery systems and run Monte Carlo simulations to compare their effects on tanking behavior, competitive balance, and draft equity.

Select Systems (max 2 for comparison)
Simulation Parameters
5–500. More runs = more accurate, slower.
3–30. Longer = better long-run stats.
Leave blank for random. Same seed = same results.
League
Scales team count, schedule length, and playoff structure automatically.
Simulating… this may take a few seconds
Historical NBA Season Analysis

Pick a real NBA season (2000–01 through 2025–26) and see how each lottery system would have assigned draft picks — compared to what actually happened.

2000-01 through 2025-26 · 2025-26 lottery pending
More draws = smoother probabilities.
System Reference — How Each One Works
# System Core Mechanic Real-World?
1 Current NBA
The three worst teams each receive 14% odds for pick #1. Odds taper to 0.5% at the 14th slot. Picks 1–4 are drawn by weighted lottery; picks 5–14 follow record order (worst first).
Pick #1 odds by slot
Slot Record Odds
1 Worst 14.0%
2 14.0%
3 14.0%
4 12.5%
5 10.5%
6 9.0%
7 7.5%
8 6.0%
9 4.5%
10 3.0%
11 2.0%
12 1.5%
13 1.0%
14 Best non-playoff 0.5%
✓ NBA (current)
2 Flat Bottom
Every one of the 14 lottery teams gets exactly equal odds (~7.1% each) for pick #1. The lottery still applies to picks 1–4; picks 5–14 go by record. Losing an extra game gives no lottery advantage whatsoever.
Pick #1 odds by slot
Slot Record Odds
1 Worst 7.1%
2 7.1%
3 7.1%
4 7.1%
5 7.1%
6 7.1%
7 7.1%
8 7.1%
9 7.1%
10 7.1%
11 7.1%
12 7.1%
13 7.1%
14 Best non-playoff 7.1%
3 Play-In Boost
The 4 teams that just missed the playoffs (play-in zone) receive the highest lottery odds — equal to or better than any floor team. Being competitive enough for the play-in is the reward; bottoming out is not.
Pick #1 odds by slot
Slot Record Odds
1 Worst 0.5%
2 1.0%
3 1.5%
4 2.0%
5 3.0%
6 4.5%
7 6.0%
8 7.5%
9 9.0%
10 10.5%
11 12.5%
12 14.0%
13 14.0%
14 Best non-playoff 14.0%
Slots 11–14 are play-in teams (closest to the playoff cut)
4 UEFA Coefficient
A rolling 3-year weighted score (50% current / 30% prior / 20% two years ago) determines each team's lottery weight. One bad season barely moves the needle — you need sustained futility to earn top odds. This kills one-year tanking but rewards genuine rebuilds.
Pick #1 odds by slot
Slot Record Odds
1 Worst 17.5%
2 16.5%
3 14.5%
4 12.0%
5 9.5%
6 7.5%
7 5.5%
8 4.0%
9 3.0%
10 2.5%
11 2.0%
12 2.0%
13 1.5%
14 Best non-playoff 2.0%
Approximate — actual odds vary by each team's 3-year performance history.
Inspired by UEFA
5 RCL
Multi-year coefficient (similar to UEFA) plus head-to-head record versus other lottery teams. Hard caps enforce fairness: no team can receive the #1 pick more than once in 5 years, or a top-3 pick more than twice in 5 years.
Pick #1 odds by slot
Slot Record Odds
1 Worst 16.0%
2 15.0%
3 13.5%
4 11.5%
5 9.5%
6 7.5%
7 6.0%
8 4.5%
9 3.5%
10 2.5%
11 2.0%
12 2.0%
13 2.0%
14 Best non-playoff 4.5%
Approximate — teams capped on #1 or top-3 picks are excluded from those slots and their weight is redistributed.
6 Lottery Tournament
The 8 worst teams by record play a single-elimination tournament. The tournament winner earns pick #1. Teams 9–14 get picks 9–14 by record. You need to be in the bottom 8 AND win games to land the top pick.
Pick #1 odds by slot
Slot Record Odds
1 Worst 18.0%
2 16.0%
3 14.0%
4 13.0%
5 12.0%
6 11.0%
7 9.0%
8 7.0%
9 0.0%
10 0.0%
11 0.0%
12 0.0%
13 0.0%
14 Best non-playoff 0.0%
Slots 1–8 enter the tournament. Slots 9–14 cannot win pick #1. Values are approximate win-probability estimates.
7 Pure Inversion
No lottery at all. The best non-playoff team picks #1; the worst non-playoff team picks last. This completely inverts the tanking incentive — losing hurts your draft position. Every team should try hard all season.
Pick #1 odds by slot
Slot Record Odds
1 Worst 0.0%
2 0.0%
3 0.0%
4 0.0%
5 0.0%
6 0.0%
7 0.0%
8 0.0%
9 0.0%
10 0.0%
11 0.0%
12 0.0%
13 0.0%
14 Best non-playoff 100.0%
Deterministic. Only the best non-playoff team (slot 14) gets pick #1.
8 Gold Plan (PWHL)
Draft order is determined by wins accumulated after a team is mathematically eliminated from playoff contention. Teams that keep competing hard after elimination are rewarded. This system is used in real life by the PWHL.
Pick #1 odds by slot
Slot Record Odds
1 Worst 5.5%
2 6.5%
3 8.0%
4 9.0%
5 9.0%
6 9.0%
7 8.5%
8 8.0%
9 7.5%
10 6.5%
11 6.0%
12 5.5%
13 5.0%
14 Best non-playoff 4.5%
Approximate — actual odds depend on when each team is eliminated and post-elimination performance, not record directly.
✓ PWHL (live)
9 Chip Window
Proposed by Ron Bronson (2026). Activates at game 60 for all 30 teams. Starting chips are assigned by quintile: the worst 6 teams begin with 100, the next 6 with 80, middle 6 with 60, next 6 with 40, and the best 6 with 20 — giving bad teams more firepower without rewarding additional losing. All 30 teams have a pre-assigned home night where they may declare their double. Analytics teams bid with fine-grained precision (2 decimal places) to avoid ties. Chips are clamped at 10 — teams always have enough to bid next game. The 14 lottery teams' final chip totals determine draft order directly: most chips = Pick 1, fewest chips = Pick 14. Fully deterministic — no lottery draw. Ties (rare) are broken by worse record. Picks 15–30 go to playoff teams by record. Tanking is structurally impossible: losing depletes chips at the same rate regardless of intent.
Pick #1 odds by slot
Slot Record Odds
1 Worst 8.0%
2 7.5%
3 7.0%
4 7.0%
5 6.5%
6 6.5%
7 7.0%
8 7.0%
9 7.5%
10 7.5%
11 7.5%
12 8.0%
13 8.5%
14 Best non-playoff 9.5%
Deterministic chip-standings draft order. Most chips = Pick 1 among the 14 lottery teams. Worst-record teams start with more chips (100 vs 20 for the best teams) but still must earn their pick by outperforming rivals in the 22-game chip window. Approximate pick-position probabilities shown; actual results depend on each season's chip window outcomes.
10 The Wheel
Every team cycles through all 30 pick positions on a fixed 30-year rotation. No randomness — each team's draft slot is known years in advance. Tanking is completely pointless because record has zero impact on draft position.
Deterministic. Draft slot is pre-assigned by rotation; all teams pick 1st exactly once every 30 years.
Proposed reform
11 Pre-2019 Legacy NBA
The original NBA lottery system in use before 2019. The worst team receives 25% odds for pick #1, the 2nd-worst 19.9%, the 3rd-worst 15.6%, tapering sharply to 0.5% at slot 14. Only picks 1–3 are drawn by lottery; picks 4–14 follow record order.
Pick #1 odds by slot
Slot Record Odds
1 Worst 25.0%
2 19.9%
3 15.6%
4 11.9%
5 8.8%
6 6.3%
7 4.3%
8 2.8%
9 1.7%
10 1.1%
11 0.8%
12 0.7%
13 0.6%
14 Best non-playoff 0.5%
Authentic pre-2019 odds. Only the top 3 picks are drawn by lottery; pick 4+ go strictly by record.
✓ NBA (pre-2019)
12 Equal Odds
All 14 lottery teams have exactly equal 7.14% odds for the #1 pick. Picks 1–4 are drawn by equal-weight lottery; picks 5–14 go strictly by record (worst first). Maximally random — record has no bearing whatsoever on landing a top-4 pick.
Pick #1 odds by slot
Slot Record Odds
1 Worst 7.1%
2 7.1%
3 7.1%
4 7.1%
5 7.1%
6 7.1%
7 7.1%
8 7.1%
9 7.1%
10 7.1%
11 7.1%
12 7.1%
13 7.1%
14 Best non-playoff 7.1%
Picks 1–4 are drawn by equal-weight lottery from all 14 teams. Picks 5–14 go by record.
13 Top-4 Only Lottery
Only the 4 worst teams by record enter a weighted lottery for picks 1–4. The worst team gets the most lottery weight (40%), tapering to 10% for the 4th-worst. Teams ranked 5–14 receive picks 5–14 in strict record order.
Pick #1 odds by slot
Slot Record Odds
1 Worst 40.0%
2 30.0%
3 20.0%
4 10.0%
5 0.0%
6 0.0%
7 0.0%
8 0.0%
9 0.0%
10 0.0%
11 0.0%
12 0.0%
13 0.0%
14 Best non-playoff 0.0%
Only the 4 worst teams enter the lottery. Weights: 40/30/20/10% (worst to 4th-worst). Slots 5–14 get picks 5–14 by record.
14 Current NHL
The NHL Entry Draft Lottery determines only picks #1 and #2 by weighted draw. The worst team has 18.5% odds for pick #1, tapering to 0.5% for the 16th slot. Picks 3–16 are then assigned in strict reverse-standings order. Introduced in its current form for the 2024 draft.
Pick #1 odds by slot
Slot Record Odds
1 Worst 18.5%
2 13.5%
3 11.5%
4 9.5%
5 8.5%
6 7.5%
7 6.5%
8 6.0%
9 5.0%
10 3.5%
11 3.0%
12 2.5%
13 2.0%
14 Best non-playoff 1.5%
15 1.0%
16 0.5%
Official NHL Entry Draft Lottery odds (2024+). Only picks #1 and #2 are drawn by lottery; picks 3–16 follow record order.
15 Current MLB
MLB introduced a draft lottery in 2023 for the top 6 picks among the 18 non-postseason teams. The two worst teams share the highest odds at 16.5% each for pick #1, tapering sharply to 0.5% at slots 17–18. Picks 7–18 are assigned in strict reverse-standings order.
Pick #1 odds by slot
Slot Record Odds
1 Worst 16.5%
2 16.5%
3 13.0%
4 10.0%
5 7.5%
6 5.5%
7 5.0%
8 4.5%
9 4.0%
10 3.5%
11 3.0%
12 2.5%
13 2.0%
14 Best non-playoff 1.5%
15 1.0%
16 1.0%
17 0.5%
18 0.5%
Official MLB Draft Lottery odds (2023+). Picks #1–#6 are drawn by lottery; picks 7–18 follow record order.