Non capture positions

Win: 50.529.263 (99.9%)
Draw: 52.280 (0.1%)
Lose: 0 (0.0%)

All positions

Win: 192.356.836 (99.9%)
Draw: 277.363 (0.1%)
Lose: 1 (0.0%)

Native examples were selected after counting from 4506 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 0, Black 2.

W:WK3,K8,K14,K23:B44,45

MoveResult
3-9Draw
8-2Draw
8-12Draw
8-17Draw
8-21Draw
8-26Draw
8-13Draw
8-19Draw
8-24Draw
8-30Draw
8-35Draw
14-9Draw
14-10Draw
14-5Draw
14-19Draw
14-20Draw
14-25Draw
23-18Draw
23-12Draw
23-7Draw
23-1Win
23-19Draw
23-28Draw
23-32Draw
23-37Draw
23-41Draw
23-46Draw
23-29Draw
23-34Draw
23-40Draw

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 0, Black 2.

B:WK2,K11,K18,K44:B43,45

MoveResult
43-49Loss
43-48Loss
45-50Draw

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 0, Black 2.

B:WK1,K29,K36,K47:B44,45

MoveResult
44-50Loss
44-49Draw
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 0, Black 2.

W:WK8,K24,K25,K42:B41,44

MoveResult
8-2Draw
8-3Draw
8-12Draw
8-17Draw
8-21Draw
8-26Draw
8-13Draw
8-19Draw
24-19Draw
24-13Draw
24-20Draw
24-15Draw
24-29Draw
24-33Draw
24-38Draw
24-30Draw
24-35Draw
25-20Draw
25-14Draw
25-9Draw
25-3Draw
25-30Draw
25-34Draw
25-39Draw
25-43Draw
25-48Draw
42-37Win
42-31Draw
42-26Draw
42-38Draw
42-33Draw
42-29Draw
42-47Draw
42-48Draw

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.

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.