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Subject: [CFP in the Competition] Core Challenge 2023

Call For Participants in the competition

The 2nd Combinatorial Reconfiguration Challenge 
(CoRe Challenge 2023)

Submission deadline: Apr. 30, 2023

 ** Overview **

Combinatorial Reconfiguration is a novel algorithmic concept that provides 
mathematical models and analysis for "transformations over state spaces." 
Its appearance ranges from theory to applications. However, its technical 
achievements are hard to access. Thus, it is required to found a common 
infrastructure for utilizing and applying the algorithmic technology of 
combinatorial reconfiguration. 
See this website 
( for more 

The 2nd Combinatorial Reconfiguration Challenge (CoRe Challenge 2023) is a 
competition aiming for practically exploring the combinatorial 

This 2nd challenge continues to target the Independent Set Reconfiguration (ISR) 
The ISR problem is one of the most well-studied reconfiguration problems. 
Theoretically, the problem is PSPACE-complete, which implies that there 
exist instances such that even a shortest reconfiguration sequence requires 
a super polynomial steps. Theoretical results and their references can be 
found in a survey by N. Nishimura (

 ** Important Dates **

(Apr. 30, 2023) Challenge ends (submission deadline) --- 23:59 AoE, UTC-12

 ** Rules/Tracks and Other Details **

See our web page

 ** Award **

Certificates will be awarded to participants who perform well in each 

 ** Support **

KAKENHI Grant-in-Aid for Transformative Research Areas (B)
"Fusion of Computer Science, Engineering and Mathematics Approaches for 
Expanding Combinatorial Reconfiguration"

 ** Organizers **

Takehiro Ito (Tohoku University, Japan)
Yoshio Okamoto (The University of Electro-Communications, Japan)
Takehide Soh (Kobe University, Japan)
Tomoya Tanjo (National Institute of Genetics, Japan)

 ** Contact **

For public questions, please use
For private questions, please use core.challenge [at]