Non capture positions

Win: 3.337.999 (60.0%)
Draw: 2.215.868 (39.9%)
Lose: 6.219 (0.1%)

All positions

Win: 4.631.683 (67.6%)
Draw: 2.215.868 (32.3%)
Lose: 6.219 (0.1%)

Native examples were selected after counting from 15059 sampled White-quiet boards, including targeted starting-rank and losing candidates. Statistics still cover every enumerated position. An absent example does not prove the category is absent.


Special WDL positions

One example per category. Every starting position is double quiet: neither side has a capture. Results and move outcomes are relative to the player to move in the diagram. Kings have a double ring.

White-to-move examples are preferred; Black-to-move examples are retained when no qualifying White-to-move example was found.

Pip count means remaining rank distance to promotion (kings: zero). Highest pip count puts men nearest their starting ranks; both sides must simultaneously attain their material's maximum. Material disadvantage means fewer pieces.

Only move to win

At least three legal moves; exactly one wins and every alternative draws or loses.

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White to move: Win. Pip count: White 12, Black 0.

W:W6,7,12,45:BK1

MoveResult
45-40Win
7-2Draw
12-8Draw

Only move to draw

At least two legal moves; exactly one draws and every alternative loses.

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White to move: Draw. Pip count: White 26, Black 0.

W:W25,34,39,49:BK15

MoveResult
25-20Loss
34-29Draw
39-33Loss
49-43Loss
34-30Loss
49-44Loss

Mutual zugzwang

On this same board, White to move loses and Black to move loses.

No qualifying example proved from the available WDL data.

Whoever moves wins

On this same board, White to move wins and Black to move wins.

No qualifying example proved from the available WDL data.

Win with fewer pieces

The player to move has fewer pieces and a proven win.

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Black to move: Win. Pip count: White 17, Black 0.

B:W16,21,26,27:BK33

MoveResult
33-28Win
33-22Loss
33-17Loss
33-11Loss
33-6Draw
33-29Loss
33-24Loss
33-20Loss
33-15Loss
33-38Loss
33-42Loss
33-47Loss
33-39Win
33-44Win
33-50Win

Draw with fewer pieces

The player to move has fewer pieces and a proven draw.

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Black to move: Draw. Pip count: White 9, Black 0.

B:W6,7,12,30:BK20

MoveResult
20-14Loss
20-9Loss
20-3Draw
20-15Loss
20-24Loss
20-29Loss
20-33Loss
20-38Loss
20-42Loss
20-47Loss
20-25Loss

Unique winning sacrifice

Exactly one of at least two moves wins; every compulsory reply captures the piece offered by that move.

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White to move: Win. Pip count: White 17, Black 0.

W:W11,17,28,40:BK25

MoveResult
11-6Draw
28-22Draw
40-34Win
11-7Draw
17-12Draw
28-23Draw
40-35Draw

Promotion trap

A promotion draws or loses, while a non-promoting move wins.

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White to move: Win. Pip count: White 12, Black 0.

W:W6,7,8,47:BK25

MoveResult
7-1Win
8-2Win
47-41Win
6-1Win
7-2Draw
8-3Win
47-42Win

Both sides at highest pip count: win

Both sides attain their maximum pip count; the player to move wins.

No qualifying example proved from the available WDL data.

Both sides at highest pip count: loss

Both sides attain their maximum pip count; the player to move loses.

No qualifying example proved from the available WDL data.