Non capture positions

Win: 20.716.598 (91.8%)
Draw: 1.844.239 (8.2%)
Lose: 1 (0.0%)

All positions

Win: 28.834.540 (94.0%)
Draw: 1.844.239 (6.0%)
Lose: 1 (0.0%)

Native examples were selected after counting from 12815 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 9, Black 0.

W:WK1,6,11,34:BK42

MoveResult
1-7Draw
1-12Draw
1-18Draw
1-23Draw
1-29Draw
34-29Draw
11-7Draw
34-30Win

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 7, Black 0.

B:W6,8,K22,28:BK42

MoveResult
42-37Draw
42-31Loss
42-26Loss
42-38Loss
42-33Loss
42-29Loss
42-24Loss
42-20Loss
42-15Loss
42-47Loss
42-48Loss

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 7, Black 0.

B:W6,8,K22,28:BK42

MoveResult
42-37Draw
42-31Loss
42-26Loss
42-38Loss
42-33Loss
42-29Loss
42-24Loss
42-20Loss
42-15Loss
42-47Loss
42-48Loss

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 18, Black 0.

W:W19,K25,38,42:BK3

MoveResult
25-20Draw
25-14Draw
25-9Loss
25-30Draw
25-34Draw
25-39Draw
25-43Draw
25-48Draw
19-13Draw
38-32Draw
42-37Draw
19-14Win
38-33Draw

Promotion trap

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

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White to move: Win. Pip count: White 3, Black 0.

W:W6,7,10,K23:BK30

MoveResult
23-18Win
23-12Win
23-19Draw
23-14Win
23-28Win
23-32Win
23-37Win
23-41Win
23-46Win
23-29Win
23-34Draw
23-40Win
23-45Win
7-1Win
10-4Win
6-1Draw
7-2Win
10-5Win

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.