Tuesday, April 25, 2017

Covered Xiangqi # 2 : Mathematics Statistic - >Probability

Covered Xiangqi # 2 : Mathematics Statistic - >Probability 


Let do some maths before move to next steps.

Below is the definition of Probability derived from wiki.

Probability is the measure of the likelihood that an event will occur. Probability is quantified as a number between 0 and 1 (where 0 indicates impossibility and 1 indicates certainty). The higher the probability of an event, the more certain that the event will occur. A simple example is the tossing of a fair (unbiased) coin. Since the coin is unbiased, the two outcomes ("head" and "tail") are both equally probable; the probability of "head" equals the probability of "tail". Since no other outcomes are possible, the probability is 1/2 (or 50%), of either "head" or "tail". In other words, the probability of "head" is 1 out of 2 outcomes and the probability of "tail" is also 1 out of 2 outcomes, expressed as 0.5 when converted to decimal, with the above-mentioned quantification system.

Another example: Throwing a dice.
When a single die is thrown, there are six possible outcomes: 1, 2, 3, 4, 5, 6. Therefore the probability of any one of them is 1/6.

In general, Probability of an event happening = Number of way it can be happened / Total number of outcomes

However,  Probability is Just a Guide
Probability does not tell us exactly what will happen, it is just a guide.


Now back to Covered Xiangqi.

This is very important for a player to understand probability. The player needs to calculate the probability for a covered piece to be discovered during the entire game. Not only that, the player also needs to calculate the probability for his opponent's covered pieces as well. 

The probability for next covered piece to be discovered will be changed after a piece was discovered. In other words, the player needs to calculate the probability for each move.

However, bear in mind that probability does not tell you exactly which piece will be discovered. It is just a guide! It only can help you to make a decision whether to discovered any piece or not. The actual outcome still depend on your LUCK, but good calculation in probability will increase your LUCK's level. You have higher chance to discover the piece that you wish if you do your math well!




During the initial setup, each player owns 16 Xiangqi pieces, 15 of them are covered. Only the king is discovered.

Therefore for the first move, the probability to discovered a covered pieces that you wish are as below diagram.


So, based on statistic, mostly you will discover a pawn at the first move!


Let do a simple quiz.

Diagram below shown a Covered Xiangqi's  middle game. Black had discover all his pieces, whereas Red still has 2 covered pieces. One covered piece "Pawn Like" stays on File 9, and another discovered piece "Cannon Like" stays on File 2.

Based on the Red's discovered pieces, Red still has a cannon and a horse have not discovered yet.

Now questions:

1) What is the probability for covered piece on File 9 is a Cannon?
2) What is the probability for covered piece on File 2 is a Horse?
3) Based on current situation, Red to move. What is the best move for Red and why?

Post your answers on the comment box.

Have fun!






Sunday, April 23, 2017

#54 Same Direction Cannon Double Headed Snake Pawn Formation vs Double Ranked Chariot - Black Proper horses, C2=1, R1=2

 #54 Same Direction Cannon Double Headed Snake Pawn Formation vs Double Ranked Chariot - Black Proper horses, C2=1, R1=2


Outcome: Advantages go to Red

  1. C2=5  C8=5    2. H2+3  H8+7
  3. R1=2  R9+1    4. P3+1  R9=4
  5. H8+7  …………


As mentioned earlier, the most efficient move Black would be H2+3 for proper horse.

However we also discussed other variations. We had discussed Black

R4+3 R4+4, R4+5, R4+7 and P3+1 advantages all go to Red.

In this post, we will start to discuss Black H2+1.

Black H2+1 is also a main variation for Same Direction Cannons Opening.Black H2+1 is a valid move as well.

  5. …………  H2+3    6. P7+1  …………

Of course!

As mentioned in the begining to this opening series, the most effective move for Black is R1+1 for double ranked chariot.

If Black does not play R1+1, there are 4 other options:

1) R4+3
2) R4+5
3) R4+7
4) C2=1



We have learnt from previous posts, Black should not move his chariot on File 4.

How about C2=1?

We discuss C2=1 in this post

  6. …………  C2=1

Black C2=1, what is the best move for Red?

  7. R9=8  …………

Red of course C8=9!

In general, a player rarely move C2=1 because this allow opponent to develop his chariot easily.

In this situation, Black has two main variations.

1) R1=2
2) R4+5

In this post we discuss R1=2

  7. …………  R1=2

Black R1=2, what is the best move for Red?

Same Direction Cannons Opening's Trap: Horse Sacrificed

Same Direction Cannons Opening's Trap: Horse Sacrificed 

This is one of the opening trap for Same Direction Cannons variations.

In this game, at the 9th move, Red sacrificed his horse in return managed to launch long-range attack with combination of chariot and cannon. Toward end of the game, Red also played well to save his king from checkmate, and had demonstrated beautiful counter-attack.

The techniques applied in this game are useful for Xiangqi lovers to further develop their midgame skill.

Enjoy reading.




Covered Xiangqi #1 - a difference way of playing Xiangqi game

Covered Xiangqi #1 - a difference way of playing Xiangqi game


Diagram 1


Covered Xiangqi also known as 揭棋 (in Chinese) or Cờ tướng úp (in Vietnamese), is a strategy board game evolves from traditional Xiangqi game. This game is popular at Southern of China, Vietnam, Hong Kong, Taiwan and South East Asia.

The mentioned game uses the same Xiangqi board and Xiangqi pieces. The movement for of the pieces are same as traditional Xiangqi game. The game rules are similar. The objective of the Covered Xiangqi game is to capture opponent's King.

Of course there are some differences.

At the initial setup, both kings are facing up  and stayed on the original position as in traditional Xiangqi game. On each side, the remaining pieces are mixed randomly and put on the board facing down (covered) on the intersection point same as traditional Xiangqi during initial setup. Since the pieces are facing down (or covered), both players are unable to identify the actual identity of the pieces. The Diagram 1 above describes the initial setup of a Covered Xiangqi game.

When the piece is covered, it movement is same as initial traditional Xiangqi piece stays at initial position. The player needs to move the covered piece same as the initial traditional piece stays at that initial position. Once the piece is moved and discovered, the piece will be facing up and disclosed its original identify. After that,  its movement will follow the original discovered piece.

For example, a covered piece on traditional center pawn initial position, its movement is same as a pawn. In other words, it only can move one step forward. After Red moved the piece one step forward, the piece need to be discovered or facing up! Once the piece is discovered, its may became any piece. It can be a pawn or a chariot or a horse or a elephant. In this example, the discovered piece was a horse (Diagram 2). After discovered, the following movement for this discovered piece would be horse. 


Diagram 2


The main difference within Covered Xiangqi and traditional Xiangqi is: The advisor and elephant pieces are allowed to cross the river to opponent's side and aid on attack.



From time to time,  I will start to share with the readers more details on:

1) Basic Opening for Covered Xiangqi
2) Basic Checkmate methods (with combination of advisor and elephant)


A traditional Xiangqi lover can learn how to play Covered Xiangqi in less than 3 minutes. If you are not familiar with traditional Xiangqi, you can refer to my book: "Xiangqi for Absolute Beginners: Teach yourself Xiangqi Step by Step"

Do follow this blog for the latest update.






Saturday, April 22, 2017

GM Yang GuanLin: Offer his chariot for FREE 4 times....and still won the game!


Li YiTing vs Yang GuanLin

Both of the players were China Xiangqi National Champion.


GM Yang GuanLin: Offer his chariot for FREE 4 times

The game position shown below was a battle within GM Li YiTing and GM Yang GuanLin.

In this game, GM Yang GuanLin had demonstrated his superior skill in middle game and endgame, and his ability to manage the complicated situation. He was a dangerous attacking player with a mindset that is bold and fear nothing. GM Yang managed to find the right moment to breakthrough Red's defense by offering his chariot 4 times.

Enjoy the game!

Black to move!


1. ...... R7-3
This was the first attempt for Black to offer his chariot. 

A wonderful endgame: Sacrificed Cannon and Horse in order to win the game with two pawns


A wonderful endgame: Sacrificed Cannon and Horse in order to win the game with two pawns

Black's horse stayed on file 2 was capturing Red's pawn, whereas Black's horse stayed on center file was capturing Red's advisor. It seems that Red was in difficult situation.

The diagram shown the game position for 2017 China Xiangqi Tournament -team event, Xie YeJian (Hunan) against Mi YueJin (Xinjiang) at 60th move. Red was in advantages with additional 2 pawns. However, Red had lose both elephants and under attack by Black's double horses. During this critical moment, Red had demonstrated his ability in complicated calculation and high-skill endgame, sacrificed his cannon and horse and finally defeated his opponent with his last 2 pawns.

White to move!




Wednesday, April 19, 2017

#53 Same Direction Cannon Double Headed Snake Pawn Formation vs Double Ranked Chariot - Black Proper horses, R4+7

 #53 Same Direction Cannon Double Headed Snake Pawn Formation vs Double Ranked Chariot - Black Proper horses, R4+7


Outcome: Advantages go to Red

  1. C2=5  C8=5    2. H2+3  H8+7
  3. R1=2  R9+1    4. P3+1  R9=4
  5. H8+7  …………


As mentioned earlier, the most efficient move Black would be H2+3 for proper horse.

However we also discussed other variations. We had discussed Black

R4+3 R4+4, R4+5, R4+7 and P3+1 advantages all go to Red.

In this post, we will start to discuss Black H2+1.

Black H2+1 is also a main variation for Same Direction Cannons Opening.Black H2+1 is a valid move as well.

  5. …………  H2+3    6. P7+1  …………

Of course!

As mentioned in the begining to this opening series, the most effective move for Black is R1+1 for double ranked chariot.

If Black does not play R1+1, there are 4 other options:

1) R4+3
2) R4+5
3) R4+7
4) C2=1

In previous post, Black R4+3,R4+5 advantage go to Red.

We discuss R4+7 in this post

  6. …………  R4+7

Black R4+7.
Therefore what is the best move for Red?

Sunday, April 16, 2017

#52 Same Direction Cannon Double Headed Snake Pawn Formation vs Double Ranked Chariot - Black Proper horses, R4+5

 #52 Same Direction Cannon Double Headed Snake Pawn Formation vs Double Ranked Chariot - Black Proper horses, R4+5


Outcome: Advantages go to Red

  1. C2=5  C8=5    2. H2+3  H8+7
  3. R1=2  R9+1    4. P3+1  R9=4
  5. H8+7  …………


As mentioned earlier, the most efficient move Black would be H2+3 for proper horse.

However we also discussed other variations. We had discussed Black

R4+3 R4+4, R4+5, R4+7 and P3+1 advantages all go to Red.

In this post, we will start to discuss Black H2+1.

Black H2+1 is also a main variation for Same Direction Cannons Opening.Black H2+1 is a valid move as well.

  5. …………  H2+3    6. P7+1  …………

Of course!

As mentioned in the begining to this opening series, the most effective move for Black is R1+1 for double ranked chariot.

If Black does not play R1+1, there are 4 other options:

1) R4+3
2) R4+5
3) R4+7
4) C2=1

In previous post, Black R4+3, advantage go to Red.

We discuss R4+5 in this post

  6. …………  R4+5

Black R4+5.

What is the most effective move for Red?

Friday, April 14, 2017

2017 China National Xiangqi Team Tournament - Round 4


2017 China National Xiangqi Team Tournament - Round 4

Game selections

Jing Xueyi loses to Wang Tianyi  Game Notation

Zhao Guorong wins Xie Kui Game Notation

Zhao Xinxin wins Wang Hao Game Notation

Hong Zhi wins Guo HaiJun Game Notation

Jiang Chuan wins Sung Guoqiong Game Notation 



How to:


Wang Tianyi wins Li Xiaolong: 2017 China National Xiangqi Team Tournament - Round 3

Wang Tianyi wins Li Xiaolong2017 China National Xiangqi Team Tournament - Round 3

9th April 2017


Wang Tianyi is well known with his horse-cannon end game. The game below perfectly describing his competency in end game!


Song Guoqiang loses to Hong Zhi: 2017 China National Xiangqi Team Tournament - Round 3


Song Guoqiang loses to Hong Zhi

2017 China National Xiangqi Team Tournament - Round 3
9th April 2017


Hong Zhi is one of the top China's player. He Xiangqi's strategy is to make the board situation complicated. He is able to seek for opportunity in the complex situation.

This game is a good example! Both sides counter attack heavily, and the board situation was very complicated.

Enjoy.


Wang Yang wins Wu Junqiang: 2017 China National Xiangqi Team Tournament - Round 3


Wang Yang wins Wu Junqiang


2017 China National Xiangqi Team Tournament - Round 3
9th April 2017



Wang Yang started the game with horse opening, then transformed into Screen Horses Defense. Whereas, Wu Junqiang used Single Horse Defenses Ranked Chariot opening. In the middle game, Black made a mistake, simply deployed his cannon to front line without getting support from other main pieces. Red took this opportunity, contained and captured this cannon. This led Red to win the game.