Numbers Sigma Puzzle vs MindChess

Numbers Sigma Puzzle is a minimalistic math puzzle game where you have to find the right combination of numbers on your screen. Your goal is to remove redundant numbers from the field. The sum of the remaining numbers in each row or column must coincide with the given numbers, which are indicated along the edges of the playing field. Click a number to remove it. Tap it again to return a deleted number to the field. Click and hold the number or double-click to lock it. If you know that a particular number needs to be used, you can lock it on to make solving the rest of the puzzle easier. "Solution" button is available without restriction. All the tasks are divided into 5 categories of dimension (5x5, 6x6, 7x7, 8x8, 9x9). Each group has 1000 levels. There are total (5x1000) = 5000 tasks.

MindChess is a daily chess gym and a study companion. Train board vision, memory and calculation in 60-second sessions, then take what you learn to your own games. THE GYM • Thirteen short drills: Square Color, Coordinates, Same Color, Same Diagonal, Bishop Captures, Two Knights, Collision, Memory, Mate in 1, Fork Finder, Piece Snapshot, Knight Distance and Opening Flash. • Timed mode (60 seconds, Game Center leaderboards) and Training mode (3 lives). • A daily challenge and a daily streak, with streak freezes and an optional reminder. • 39 achievements: badges at 10, 50 and 100 games of every drill, also in Game Center. THE STUDY TOOLS • Repertoire: play through your opening lines and the app brings each one back right before you'd forget it. • My games: game databases, PGN import and a viewer with variations, notes and marks. • Analysis: Stockfish 19 on your device, offline, with an evaluation bar and the top 3 lines. With Pro, the game report marks your mistakes. • Diagram scanner: snap a diagram and get the position ready to edit. Free. • Chess clock: increments, stages and time odds, for games with your phone on the table. • Notation your way: English, Spanish or figurines. The same board, with your look, across the app. • Public roadmap: see what's coming and vote for ideas. ON EVERY SCREEN MindChess works on iPhone, iPad, iPhone Duo and Mac. MINDCHESS PRO Pro unlocks Stockfish analysis and the game report, unlimited repertoires, lines and PGN imports, full statistics, unlimited game databases and clock controls, every drill every day and 11 Pro piece sets. Free stays useful: the scanner, the PGN viewer and the basic drills. MindChess is not an app for playing online games. It is the place where you train between them. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/