Non capture positions

Win: 191.109.550 (100.0%)
Draw: 0 (0.0%)
Lose: 0 (0.0%)

All positions

Win: 386.241.300 (100.0%)
Draw: 0 (0.0%)
Lose: 0 (0.0%)

Native examples were selected after counting from 8324 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.

No qualifying example proved from the available WDL data.

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.

No qualifying example proved from the available WDL data.

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.

No qualifying example proved from the available WDL data.

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 9, Black 9.

W:WK1,K2,K44,K45,46:B5

MoveResult
1-6Win
1-7Win
1-12Win
1-18Win
1-23Win
1-29Win
1-34Win
1-40Win
2-7Win
2-11Win
2-16Win
2-8Win
2-13Win
2-19Win
2-24Win
2-30Win
2-35Win
44-39Win
44-33Win
44-28Win
44-22Win
44-17Win
44-11Win
44-6Win
44-40Win
44-35Win
44-49Win
44-50Win
45-40Win
45-34Win
45-29Win
45-23Win
45-18Win
45-12Win
45-7Win
45-50Win
46-41Win

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 9, Black 9.

B:WK1,K2,K44,K45,46:B5

MoveResult
5-10Loss