1. Sashité for Developers
2. Specifications
3. EPIN
4. 1.0.0
5. Examples

EPIN Examples

Quick implementation guide for Extended Piece Identifier Notation v1.0.0 extending PIN with style derivation markers.

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PIN Extension

Basic Extension

PIN	EPIN Variants	Interpretation
K	K, K'	King with native/foreign styles
k	k, k'	King with native/foreign styles
+K	+K, +K'	Enhanced king with native/foreign styles
+k	+k, +k'	Enhanced king with native/foreign styles
-P	-P, -P'	Diminished pawn with native/foreign styles
-p	-p, -p'	Diminished pawn with native/foreign styles

Style Derivation Logic

EPIN Format	Style Source	Usage
K	Current side’s native style	Standard representation
K'	Opposite side’s native style	Cross-style scenarios
k	Current side’s native style	Standard representation
k'	Opposite side’s native style	Cross-style scenarios

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Single-Style Games

Western Chess (Both Players)

PIN Base	EPIN	Interpretation
K	K	White king (Chess style - native)
+K	+K	White king, enhanced state (Chess style)
+R	+R	White rook, enhanced state (Chess style)
-P	-P	White pawn, diminished state (Chess style)
k	k	Black king (Chess style - native)
+k	+k	Black king, enhanced state (Chess style)
+r	+r	Black rook, enhanced state (Chess style)
-p	-p	Black pawn, diminished state (Chess style)

Japanese Shōgi (Both Players)

PIN Base	EPIN	Interpretation
K	K	Sente king (Shōgi style - native)
R	R	Sente rook (Shōgi style - native)
+R	+R	Sente promoted rook (Shōgi style - native)
S	S	Sente silver general (Shōgi style - native)
+S	+S	Sente promoted silver (Shōgi style - native)
k	k	Gote king (Shōgi style - native)
r	r	Gote rook (Shōgi style - native)
+r	+r	Gote promoted rook (Shōgi style - native)
s	s	Gote silver general (Shōgi style - native)
+s	+s	Gote promoted silver (Shōgi style - native)

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Cross-Style Games

Chess vs. Makruk

First player (uppercase): Chess style Second player (lowercase): Makruk style

PIN Base	EPIN	Interpretation
P	P	White pawn (Chess style - native)
P	P'	White pawn (Makruk style - foreign)
R	R	White rook (Chess style - native)
R	R'	White rook (Makruk style - foreign)
p	p	Black pawn (Makruk style - native)
p	p'	Black pawn (Chess style - foreign)
r	r	Black rook (Makruk style - native)
r	r'	Black rook (Chess style - foreign)

Chess vs. Ōgi

First player (uppercase): Chess style Second player (lowercase): Ōgi style

PIN Base	EPIN	Interpretation
K	K	White king (Chess style - native)
Q	Q	White queen (Chess style - native)
k	k	Black king (Ōgi style - native)
s	s	Black silver (Ōgi style - native)
+s	+s	Black promoted silver (Ōgi style - native)
K	K'	White king (Ōgi style - foreign)
k	k'	Black king (Chess style - foreign)

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PIN Compatibility

Backward Compatibility

All valid PIN identifiers are valid EPIN identifiers:

PIN	EPIN	Status
K	K	Valid EPIN (native style)
+R	+R	Valid EPIN (enhanced, native style)
-p	-p	Valid EPIN (diminished, native style)

Extension Benefits

EPIN adds style capabilities while preserving PIN features:

• Compact representation: Same character count as PIN for native pieces
• State preservation: All PIN state modifiers maintained
• Style awareness: Added foreign style capability through ' marker