Non capture positions

Win: 128.698 (0.1%)
Draw: 61.866.696 (42.8%)
Lose: 82.692.145 (57.2%)

All positions

Win: 525.085 (0.2%)
Draw: 92.805.110 (40.3%)
Lose: 136.760.655 (59.4%)

Native examples were selected after counting from 12440 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 12, Black 0.

W:W8,12,49:BK17,K21,K31

MoveResult
8-2Draw
12-7Draw
49-43Draw
8-3Win
49-44Draw

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 7, Black 0.

W:W6,11,21:BK1,K13,K40

MoveResult
21-16Loss
11-7Draw
21-17Loss

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.

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White to move: Win. Pip count: White 12, Black 0.

W:W8,12,49:BK17,K21,K31

MoveResult
8-2Draw
12-7Draw
49-43Draw
8-3Win
49-44Draw

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.

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Black to move: Win. Pip count: White 5, Black 0.

B:W6,9,16:BK7,K26,K28

MoveResult
7-1Draw
7-2Draw
7-11Draw
7-12Draw
7-18Draw
7-23Draw
7-29Draw
7-34Draw
7-40Draw
7-45Draw
26-21Draw
26-17Draw
26-12Draw
26-8Draw
26-3Draw
26-31Draw
26-37Draw
26-42Draw
26-48Draw
28-22Draw
28-17Draw
28-11Win
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

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.