Tsumeshogi Challenge

Solution to Problem 90

Solution: 1. N*2d Px2d 2. B*2a K-2b 3. +R-2c Kx2c 4. B*4a K-2b 5. B4a-3b+ mate (9 moves) Variations: 1... K-2a 2. B*4c K-2b 3. B-3b+ mate (5 moves, koma-amari) 1... K-2b 2. B*3a K-2a 3. B*3b mate (5 moves) 2... Kx2a 3. +R-2c S-2b 4. B*3b mate (7 moves) Yozume (discovered by Reijer Grimbergen): 4. B*3b K-2b 5. Sx3c+ Kx3c 6. B-4c+ K-2b 7. +B-3b mate (13 moves, koma-amari) Tries: 2. B*2c K-2b 3. B*3a K-2a 4. B-3b+ Kx3b escapes. 3. B*3a Kx2a 4. +R-2c L*2b escapes.

Correct Solvers Reijer Grimbergen Japan Ralf Lundberg Sweden Kees Wiebering Netherlands Jochum Drechsler Germany Ronny Thoernvall Sweden Martin Danerud Sweden Eric Cheymol France Jarl Ove Staurnes Norway Lawrence Chai Mee Joon Singapore Yoshiaki Nakanishi Japan Kai Wan Leung Hong Kong Tan Teng Chuan Singapore Donald Shaw USA Victor Contoski USA