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Seki (関 勝寿)

@sekik

Professor of soil physics and hydrology. https://sekika.github.io/toyo/en/ Maintaining feeds of Soil Science, Hydrology, 将棋, etc https://github.com/sekika/sekika/blob/main/bluesky/feed.md JA/EN/FR

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Posts 21.09.2023
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Latest posts by Seki (関 勝寿) @sekik

Ne7+ Kh8 Ng6+ hxg6 hxg3+

11.03.2026 16:49 👍 0 🔁 0 💬 0 📌 0

Bxf2+ Kxf2 Ng4+ Kg1 Ne3

10.03.2026 13:27 👍 0 🔁 0 💬 0 📌 0

Rd2+ Kh3 Rd3+ Kg2 Rb2+ Kf1 Rd1#

08.03.2026 12:44 👍 0 🔁 0 💬 0 📌 0

Bxa6 Bxa6 Nd5 f6 Nxc7+ Kf7 Nxa6

07.03.2026 18:15 👍 1 🔁 0 💬 0 📌 0

maybe Bf4+ Bxf4 Nxd5?

07.03.2026 18:10 👍 1 🔁 0 💬 0 📌 0

Oh, right. Bxf3 is needed

05.03.2026 17:48 👍 1 🔁 0 💬 0 📌 0

Bxg3 fxg3 Qd4+

05.03.2026 13:11 👍 0 🔁 0 💬 1 📌 0

Bxf2+ Kxf2 Ng4+ Kg1 Ne3

04.03.2026 14:33 👍 1 🔁 0 💬 0 📌 0

Bxd6 Rxd6 Ke7 Rd3 Rxc8

04.03.2026 03:32 👍 1 🔁 0 💬 0 📌 0

Rxf8+ Bxf8 Qf1

01.03.2026 16:59 👍 1 🔁 0 💬 0 📌 0

Nxd5 Bxh7+ Kxh7 Qh5+ Kg8 dxe5 Bc5

26.02.2026 18:32 👍 0 🔁 0 💬 0 📌 0

Bxf7+ Kd7 Nxe5+ dxe5 Qe6#

24.02.2026 17:31 👍 1 🔁 0 💬 0 📌 0

Rd8+ Qxd8 Nxe6+ Ke7 Nxd8

23.02.2026 13:21 👍 1 🔁 0 💬 0 📌 0

Qg7 Kd8 Qd7#

23.02.2026 08:11 👍 1 🔁 0 💬 0 📌 0

Qf1+ Rg1 Qf3+ Rg2 Qe4 Kg1 Qe1#
nice puzzle!

19.02.2026 14:00 👍 1 🔁 0 💬 0 📌 0

Rxh5 gxh5 Rxh5 Nxh5 Qg5+ Kf8 Qh6+ Kg8 Qh8#

19.02.2026 06:29 👍 1 🔁 0 💬 0 📌 0

Qe1+ Rxe1 Nf2+ Kg1 Nxh3+ gxh3 hxg6

17.02.2026 12:50 👍 0 🔁 0 💬 0 📌 0

Nd8+ Kh8 Qe8+

16.02.2026 13:12 👍 0 🔁 0 💬 0 📌 0

Qf3 c5 Qf7#

15.02.2026 15:09 👍 1 🔁 0 💬 0 📌 0

Bb5+

13.02.2026 18:29 👍 0 🔁 0 💬 0 📌 0

Qxf2+ Kh1 Kxg2+ Kxg2 Bxd5+ Kg3 Rf3+ Kg2 Kg4+ Kh1 Rxf1#

12.02.2026 16:48 👍 0 🔁 0 💬 0 📌 0

Nxc8 Bxf3 Ne6+ Kh7 Nxg6

10.02.2026 16:46 👍 0 🔁 0 💬 0 📌 0

Be3
if fxe3, Qxg2#
if g3 or Qf1, Bc6
if Kf1, Qxg2+ Ke2 Qxf2+ Kd1 Bg4+

09.02.2026 15:57 👍 0 🔁 0 💬 0 📌 0

it will be a bit longer when
Qxf8+ Kxf8 fxg7+ Ke7 g8=N+ Kf8

08.02.2026 11:09 👍 0 🔁 0 💬 0 📌 0

c7 Rd6+ Kb5 (if Kb7 Rd7, if Kc5 Rd1 c8=Q Rc1+) Rd5+ Kb4 Rd4+ Kb3 Rd3+ Kc2 Rd7 c8=Q

07.02.2026 05:20 👍 1 🔁 0 💬 0 📌 0

Nxe5 Bxd1 Bb5+ c6 dxc6 a6 c7+ axb5 cxd8=Q+ Rxd8 Nxf7 Kxf7 Kxd1

02.02.2026 18:03 👍 1 🔁 0 💬 0 📌 0

Rd6 Bxd6 Qxe6+ Kf8 exd6

01.02.2026 16:21 👍 0 🔁 0 💬 0 📌 0

f1=B ... Nf3 ... Bg2# is better because white bishop cannot prevent it

31.01.2026 09:53 👍 2 🔁 0 💬 1 📌 0

Nf7+ Kh8 Ng6+ Kg8 Nf7+ ... draw

31.01.2026 09:47 👍 1 🔁 0 💬 0 📌 0

Ng5+ hxg5 Qh5+ gxh5 Be4+ Kh6 Nf7#

29.01.2026 14:31 👍 1 🔁 0 💬 0 📌 0