Non capture positions

Win: 0 (0.0%)
Draw: 221.654 (1.0%)
Lose: 21.759.842 (99.0%)

All positions

Win: 27.136 (0.1%)
Draw: 1.276.297 (4.6%)
Lose: 26.329.227 (95.3%)

Native examples were selected after counting from 15865 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 14.

B:W8:BK9,17,22,33

MoveResult
9-3Win
9-4Draw
9-13Draw
9-18Draw
9-14Draw
9-20Draw
9-25Draw
22-28Draw
33-39Draw
17-21Draw
22-27Draw
33-38Draw

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 12.

W:W8:BK11,18,24,45

MoveResult
8-2Draw
8-3Loss

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 12.

W:W8:BK11,18,24,45

MoveResult
8-2Draw
8-3Loss

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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Black to move: Win. Pip count: White 1, Black 12.

B:W8:BK11,18,24,45

MoveResult
11-6Win
11-7Draw
11-2Win
11-16Win
11-17Win
11-22Win
11-28Win
11-33Win
11-39Win
11-44Win
11-50Win
18-23Draw
24-30Draw
18-22Draw
24-29Win
45-50Draw

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 27.

B:W46:B1,3,5,K50

MoveResult
50-44Win
50-39Win
50-33Win
50-28Win
50-22Win
50-17Win
50-11Win
50-6Win
50-45Win
1-7Win
3-9Win
1-6Win
3-8Win
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 27.

W:W46:B1,3,5,K50

MoveResult
46-41Loss