Non capture positions

Win: 1.333.265 (89.7%)
Draw: 153.291 (10.3%)
Lose: 2 (0.0%)

All positions

Win: 1.857.837 (92.4%)
Draw: 153.291 (7.6%)
Lose: 2 (0.0%)

Native examples were selected after counting from 13451 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 2, Black 1.

W:W7,8,K36:B45

MoveResult
36-31Draw
36-27Draw
36-22Win
36-18Draw
36-13Draw
36-9Draw
36-4Draw
36-41Draw
36-47Draw
7-1Draw
8-2Draw
7-2Draw
8-3Draw

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 3, Black 1.

B:W6,12,K31:B44

MoveResult
44-50Loss
44-49Draw

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 8, Black 1.

B:W6,K10,39:B45

MoveResult
45-50Draw

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 8, Black 1.

W:WK7,8,38:B45

MoveResult
7-1Draw
7-2Draw
7-11Draw
7-16Draw
7-12Draw
7-18Draw
7-23Draw
7-29Draw
7-34Draw
7-40Win
8-2Draw
38-32Draw
8-3Draw
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 8, Black 1.

W:W6,K10,39:B45

MoveResult
10-4Draw
10-5Draw
10-14Win
10-19Draw
10-23Draw
10-28Win
10-32Draw
10-37Win
10-41Draw
10-46Draw
10-15Win
39-33Win
6-1Draw
39-34Draw

Both sides at highest pip count: win

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

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White to move: Win. Pip count: White 18, Black 9.

W:WK1,46,47:B5

MoveResult
1-6Win
1-7Win
1-12Win
1-18Win
1-23Win
1-29Win
1-34Win
1-40Win
1-45Win
47-41Win
46-41Win
47-42Win

Both sides at highest pip count: loss

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

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Black to move: Loss. Pip count: White 18, Black 9.

B:WK1,46,47:B5

MoveResult
5-10Loss