Non capture positions

Win: 0 (0.0%)
Draw: 275.813 (14.6%)
Lose: 1.617.548 (85.4%)

All positions

Win: 3.864 (0.2%)
Draw: 323.718 (14.5%)
Lose: 1.911.498 (85.4%)

Native examples were selected after counting from 17361 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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Black to move: Win. Pip count: White 1, Black 1.

B:W7:BK25,K32,45

MoveResult
25-20Draw
25-14Draw
25-9Draw
25-3Draw
25-30Win
25-34Draw
25-39Draw
25-43Draw
25-48Draw
32-27Draw
32-21Draw
32-16Draw
32-28Draw
32-23Draw
32-19Draw
32-14Draw
32-10Draw
32-5Draw
32-37Draw
32-41Draw
32-46Draw
32-38Draw
32-43Draw
32-49Draw
45-50Draw

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 1, Black 1.

W:W7:BK25,K32,45

MoveResult
7-1Loss
7-2Draw

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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White to move: Draw. Pip count: White 1, Black 1.

W:W7:BK19,K36,45

MoveResult
7-1Draw
7-2Draw

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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Black to move: Win. Pip count: White 1, Black 1.

B:W7:BK15,K28,45

MoveResult
15-10Draw
15-4Draw
15-20Draw
15-24Draw
15-29Draw
15-33Draw
15-38Draw
15-42Draw
15-47Draw
28-22Draw
28-17Draw
28-11Win
28-6Draw
28-23Draw
28-19Draw
28-14Draw
28-10Draw
28-5Draw
28-32Draw
28-37Draw
28-41Draw
28-46Draw
28-33Draw
28-39Draw
28-44Draw
28-50Draw
45-50Draw

Promotion trap

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

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Black to move: Win. Pip count: White 1, Black 1.

B:W6:B44,K47,K50

MoveResult
47-41Win
47-36Win
47-42Win
47-38Win
47-33Win
47-29Win
47-24Win
47-20Win
47-15Win
50-45Win
44-49Draw

Both sides at highest pip count: win

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

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

B:W46:B5,K49,K50

MoveResult
49-43Win
49-38Win
49-32Win
49-27Win
49-21Win
49-16Win
49-44Win
49-40Win
49-35Win
50-44Win
50-39Win
50-33Win
50-28Win
50-22Win
50-17Win
50-11Win
50-6Win
50-45Win
5-10Win

Both sides at highest pip count: loss

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

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

W:W46:B5,K49,K50

MoveResult
46-41Loss