Non capture positions

Win: 445.098.954 (99.5%)
Draw: 2.254.223 (0.5%)
Lose: 5 (0.0%)

All positions

Win: 688.018.322 (99.7%)
Draw: 2.254.223 (0.3%)
Lose: 5 (0.0%)

Native examples were selected after counting from 10359 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.

No qualifying example proved from the available WDL data.

Only move to draw

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

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Black to move: Draw. Pip count: White 13, Black 0.

B:W6,K18,23,K36,43:BK20

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

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.

No qualifying example proved from the available WDL data.

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 13, Black 0.

B:W6,K18,23,K36,43:BK20

MoveResult
20-14Draw
20-9Loss
20-3Loss
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.

No qualifying example proved from the available WDL data.

Promotion trap

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

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White to move: Win. Pip count: White 11, Black 0.

W:W6,K12,23,K29,33:BK35

MoveResult
12-7Draw
12-1Win
12-8Win
12-3Win
12-17Win
12-21Win
12-26Win
12-18Draw
29-24Draw
29-20Win
29-15Win
29-34Win
29-40Draw
29-45Win
23-18Win
33-28Win
6-1Draw
23-19Draw

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.