EPIN Examples
Quick implementation guide for Extended Piece Identifier Notation v1.0.0 extending PIN with style derivation markers.
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^' |
Terminal king with native/foreign styles |
k^ |
k^, k^' |
Terminal king with native/foreign styles |
+K |
+K, +K' |
Enhanced king with native/foreign styles |
+k |
+k, +k' |
Enhanced king with native/foreign styles |
+K^ |
+K^, +K^' |
Enhanced terminal king with native/foreign styles |
+k^ |
+k^, +k^' |
Enhanced terminal 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 |
Terminal, standard representation |
K^' |
Opposite side’s native style |
Terminal, cross-style scenarios |
k |
Current side’s native style |
Standard representation |
k' |
Opposite side’s native style |
Cross-style scenarios |
Single-Style Games
Western Chess (Both Players)
| PIN Base |
EPIN |
Interpretation |
K^ |
K^ |
White king (terminal, 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 (terminal, 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 (terminal, 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 (terminal, 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) |
Cross-Style Games
Chess vs. Makruk
First player (uppercase): Chess style
Second player (lowercase): Makruk style
| PIN Base |
EPIN |
Interpretation |
K^ |
K^ |
White king (terminal, Chess style - native) |
K^ |
K^' |
White king (terminal, Makruk style - foreign) |
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) |
k^ |
k^ |
Black king (terminal, Makruk style - native) |
k^ |
k^' |
Black king (terminal, Chess 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 (terminal, Chess style - native) |
Q |
Q |
White queen (Chess style - native) |
k^ |
k^ |
Black king (terminal, Ōgi style - native) |
s |
s |
Black silver (Ōgi style - native) |
+s |
+s |
Black promoted silver (Ōgi style - native) |
K^ |
K^' |
White king (terminal, Ōgi style - foreign) |
k^ |
k^' |
Black king (terminal, Chess style - foreign) |
Combined Modifier Examples
All possible combinations for a given character:
| EPIN |
Side |
State |
Terminal |
Style |
Description |
K |
First |
Normal |
No |
Native |
Standard native piece |
k |
Second |
Normal |
No |
Native |
Standard native piece |
K^ |
First |
Normal |
Yes |
Native |
Terminal native piece |
k^ |
Second |
Normal |
Yes |
Native |
Terminal native piece |
K' |
First |
Normal |
No |
Derived |
Standard derived piece |
k' |
Second |
Normal |
No |
Derived |
Standard derived piece |
K^' |
First |
Normal |
Yes |
Derived |
Terminal derived piece |
k^' |
Second |
Normal |
Yes |
Derived |
Terminal derived piece |
+K |
First |
Enhanced |
No |
Native |
Enhanced native piece |
+k |
Second |
Enhanced |
No |
Native |
Enhanced native piece |
+K^ |
First |
Enhanced |
Yes |
Native |
Enhanced terminal native piece |
+k^ |
Second |
Enhanced |
Yes |
Native |
Enhanced terminal native piece |
+K' |
First |
Enhanced |
No |
Derived |
Enhanced derived piece |
+k' |
Second |
Enhanced |
No |
Derived |
Enhanced derived piece |
+K^' |
First |
Enhanced |
Yes |
Derived |
Enhanced terminal derived piece |
+k^' |
Second |
Enhanced |
Yes |
Derived |
Enhanced terminal derived piece |
-K |
First |
Diminished |
No |
Native |
Diminished native piece |
-k |
Second |
Diminished |
No |
Native |
Diminished native piece |
-K^ |
First |
Diminished |
Yes |
Native |
Diminished terminal native piece |
-k^ |
Second |
Diminished |
Yes |
Native |
Diminished terminal native piece |
-K' |
First |
Diminished |
No |
Derived |
Diminished derived piece |
-k' |
Second |
Diminished |
No |
Derived |
Diminished derived piece |
-K^' |
First |
Diminished |
Yes |
Derived |
Diminished terminal derived piece |
-k^' |
Second |
Diminished |
Yes |
Derived |
Diminished terminal derived piece |
PIN Compatibility
Backward Compatibility
All valid PIN identifiers are valid EPIN identifiers:
| PIN |
EPIN |
Status |
K |
K |
Valid EPIN (native style) |
K^ |
K^ |
Valid EPIN (terminal, native style) |
+R |
+R |
Valid EPIN (enhanced, native style) |
+R^ |
+R^ |
Valid EPIN (enhanced, terminal, native style) |
-p |
-p |
Valid EPIN (diminished, native style) |
-p^ |
-p^ |
Valid EPIN (diminished, terminal, 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
- Terminal preservation: All PIN terminal markers maintained
- Style awareness: Added foreign style capability through
' marker
