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

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98 April 1

Patrick Davin
davin [at] shogi [dot] net