こんにちは、岸です。
この7月くらいからでしょうか、パズルの「数独」にハマっています。
9×9の81個のマスに数字を入れていくだけの、とてもシンプルなゲーム。
キッカケは、新聞に載っている問題でした。
週末になると、朝刊のオマケにパズルのコーナーが付いてきます。
そこに毎回、数独の問題も掲載されています。
（朝日と日経が土曜日、中日は日曜日）
朝日新聞に掲載される数独問題には、★マークで難易度（1～5）が表示してあります。
5つ星レベルになると、相当手ごわいです。
本当にシンプルなパズルなのですが、やり続けていると、その奥深さに感動を覚えます。
究極のロジカルシンキングです。
当初は、毎週週末だけの楽しみにしていたのですが、最近は、少々やみつきになり、週末の新聞まで待てず、Webの無料ゲームなどもチェックしています。
Webで問題をやり出したとき、それまでの自分の甘さを思い知らされました。
朝日新聞の5つ星レベルなんてもんじゃありません。
このサイト（↓）では、初級／中級／上級／専門級／最高級と5段階の問題が日々更新されるのですが、
http://www.sudokugame.org/play.php
今の僕には、中級を完成させるのがやっと・・・。これほど奥が深いのかと、打ちのめされました。
とても憎らしいのですが、これらの問題を作る人は、相当なやり手だと思います。
泣けるほどうまく穴を空けてます、ホントに。憎らしいけど、感心しきりです。
こうしてもっともっとやみつきになっていくのでしょうか。
数独もほどほどにやってる分には脳トレになって良いらしいのですが、立て続けに3問、4問と難問を解いていくと、冗談ではなく、本当にアタマがフラフラになります。
そうなると、体に良かったはずのものが毒にしかなりません。
何でもやり過ぎはいけませんね。
最近は、中級レベルの問題を１日に１問ずつ解いています。
（１日で解けないこともままあり、何日かかろうとも、すべてのマスに数字が入るまで、マスとにらめっこしています）
マスがすべて埋まったときの喜びは格別です。
【岸】
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