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MSCoach 
MSCoach Rank:
Major General
Trophies:
897TOP 2749
Experience:
11 652 585
20 134
20 134 Equipment:
 |  |  |  |  | 83% |
Resources:
2.6M
16K
13K
341 4
155
16K 13K 341 4 155Arena points:
24Max difficulty:
Endurance:
Wins:
22 102
Last season:
[S119] November 2025
Information:
--- My javascript Player, Analyser and Board maker (mbf format download) ---
https://davidnhill.github.io/JSMinesweeper/
Doesn't support mobile devices.
--- Results from my Java solver ---
27th July 2022
Board 16x16/40 ==> Played 10,000,000, won 7,841,991, without guessing 3,449,975, guesses 12,724,859, avg 3BV 65.183, Solved 3BV/win 71.806, fairness -0.000067, win streak 58, mastery 96, win percentage 78.420 +/- 0.025, Duration 1 hour 56 minutes.
Board 9x9/10 ==> Played 10,000,000, won 9,172,151, without guessing 5,453,535, guesses 6,781,924, avg 3BV 15.780, Solved 3BV/win 16.204, fairness 0.000021, win streak 182, mastery 100, win percentage 91.722 +/- 0.017, Duration 53 minutes 41 seconds
16th July 2022
Board 30x16/99 ==> Played 10,000,000, won 4,104,274, without guessing 509,882, avg 3BV 173.872, Solved 3BV/win 274.714, fairness 0.000030, win streak 17, mastery 66, win percentage 41.043 +/- 0.030, Duration 5 hours 42 minutes
2nd Oct 2021
Board 30x16/99 ==> Played 10,000,000, won 4,094,584, without guessing 509,882, fairness 0.000049, win streak 18, mastery 65, win percentage 40.946 +/- 0.030, Duration 4 hours 52 minutes
June 2021
Board 16x16/40 ==> Played 10,000,000, won 7,836,888, without guessing 3,449,975, guesses 12,592,007, fairness -0.000135, win streak 59, mastery 96, win percentage 78.369 +/- 0.026, Duration 1 hour 54 minutes.
15th July 2021
Board 9x9/10 ==> Played 10,000,000, won 9,171,158, without guessing 5,452,351, guesses 6,759,824, fairness -0.000038, win streak 158, mastery 100, win percentage 91.712 +/- 0.017, Duration 50 minutes 45 seconds.
Board 8x8/10 ==> Played 10,000,000, won 8,181,600, without guessing 3,604,643, guesses 11,200,172, fairness -0.000087, win streak 73, mastery 98, win percentage 81.816 +/- 0.024, Duration 1 hour 7 minutes
--- 100% Expert No-flag Efficiency ---
This is a very difficult objective. I have a fairly basic algorithm for playing NF Efficiency which is available on the Javascript solver. One thing it doesn't do yet is play an optimal opening. Mainly because I can't decide whether win rate is important or the least number of clicks to win. Below the same 200,000 games are played using two starting strategies.
1) Guess the middle tile. if not an opening then resign the game. If it is an opening then open the four corners.
187,929 games fail to get past the opening strategy.
17 games won with 100% efficiency from 159 wins out of 200,000 played, clicks 767,977.
Clicks/eff100 = 45,175
100% Efficiency rate = 0.0085% (1 in 11,765 games)
2) Guess the 4 corners.
100,311 games fail to get past the opening strategy.
45 games won with 100% efficiency from 740 wins out of 200,000 played, clicks 3,471,943
Clicks/eff100 = 77,154
100% Efficiency rate = 0.0225 (1 in 4,444)
--- My javascript Player, Analyser and Board maker (mbf format download) ---
https://davidnhill.github.io/JSMinesweeper/
Doesn't support mobile devices.
--- Results from my Java solver ---
27th July 2022
Board 16x16/40 ==> Played 10,000,000, won 7,841,991, without guessing 3,449,975, guesses 12,724,859, avg 3BV 65.183, Solved 3BV/win 71.806, fairness -0.000067, win streak 58, mastery 96, win percentage 78.420 +/- 0.025, Duration 1 hour 56 minutes.
Board 9x9/10 ==> Played 10,000,000, won 9,172,151, without guessing 5,453,535, guesses 6,781,924, avg 3BV 15.780, Solved 3BV/win 16.204, fairness 0.000021, win streak 182, mastery 100, win percentage 91.722 +/- 0.017, Duration 53 minutes 41 seconds
16th July 2022
Board 30x16/99 ==> Played 10,000,000, won 4,104,274, without guessing 509,882, avg 3BV 173.872, Solved 3BV/win 274.714, fairness 0.000030, win streak 17, mastery 66, win percentage 41.043 +/- 0.030, Duration 5 hours 42 minutes
2nd Oct 2021
Board 30x16/99 ==> Played 10,000,000, won 4,094,584, without guessing 509,882, fairness 0.000049, win streak 18, mastery 65, win percentage 40.946 +/- 0.030, Duration 4 hours 52 minutes
June 2021
Board 16x16/40 ==> Played 10,000,000, won 7,836,888, without guessing 3,449,975, guesses 12,592,007, fairness -0.000135, win streak 59, mastery 96, win percentage 78.369 +/- 0.026, Duration 1 hour 54 minutes.
15th July 2021
Board 9x9/10 ==> Played 10,000,000, won 9,171,158, without guessing 5,452,351, guesses 6,759,824, fairness -0.000038, win streak 158, mastery 100, win percentage 91.712 +/- 0.017, Duration 50 minutes 45 seconds.
Board 8x8/10 ==> Played 10,000,000, won 8,181,600, without guessing 3,604,643, guesses 11,200,172, fairness -0.000087, win streak 73, mastery 98, win percentage 81.816 +/- 0.024, Duration 1 hour 7 minutes
--- 100% Expert No-flag Efficiency ---
This is a very difficult objective. I have a fairly basic algorithm for playing NF Efficiency which is available on the Javascript solver. One thing it doesn't do yet is play an optimal opening. Mainly because I can't decide whether win rate is important or the least number of clicks to win. Below the same 200,000 games are played using two starting strategies.
1) Guess the middle tile. if not an opening then resign the game. If it is an opening then open the four corners.
187,929 games fail to get past the opening strategy.
17 games won with 100% efficiency from 159 wins out of 200,000 played, clicks 767,977.
Clicks/eff100 = 45,175
100% Efficiency rate = 0.0085% (1 in 11,765 games)
2) Guess the 4 corners.
100,311 games fail to get past the opening strategy.
45 games won with 100% efficiency from 740 wins out of 200,000 played, clicks 3,471,943
Clicks/eff100 = 77,154
100% Efficiency rate = 0.0225 (1 in 4,444)