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KIBA uses the popular and easy-to-understand Round-Robin format for Bao online tournaments. In round-robin tournaments each player plays every other player in two games (once as SOUTH, once as NORTH). An example of a small round-robin is shown below (players A-B-C-D-E-F).
A | B | C | D | E | F | |
---|---|---|---|---|---|---|
A | * | A-B | A-C | A-D | A-E | A-F |
B | B-A | * | B-C | B-D | B-E | B-F |
C | C-A | C-B | * | C-D | C-E | C-F |
D | D-A | D-B | D-C | * | D-E | D-F |
E | E-A | E-B | E-C | E-D | * | E-F |
F | F-A | F-B | F-C | F-D | F-E | * |
Round-robin is very effective because each player plays every other player and then the winner is determined by the score.
Anyone can join a tournament as long as you join KIBA.
The players per tournament can range from 6 to 34.
Tournament Directors have the ability to set the number of a tournament.
First of all you have to join to KIBA on this page. After that you can join a tournament from your personal page.
Each tournament has a Tournament Director, whom players refer to in case of any problem
The tournament is played exclusively on the website and the system sends the moves to the opponent by the e-mail address the players entered when registering.
For each tournament the Director settles a start date, which is communicated to all participants.
Each player must make his move at a set time on the basis of the Fischer's system. The time unit is the day.
The Tournament Director chooses the amount of initial time, increment per move and the limit at the game setting, but the default amounts are given below:
initial time = 3 days
Example:
T=(3+1)<=7 T: time per move 3: initial time = 3 days +1: increment per move = 1 day <=7: time limit = 7 days.
The player SOUTH, at the beginning of the tournamente, is notified of the date by which he/she must move.
When a player runs out of his/her time, loses the game.
The time control is based on Greenwich Mean Time (GMT/UTC).
There are three categories of players.
The three categories are sorted in descending order of score, which we call the KIBA score, calculated by adding one-tenth of Elo to the number of games played on the KIBA website.
For example:Player Tot. Elo KIBA Matches (Elo/10+TotMatches) 1 689 2069 896 2 134 2062 340 3 1058 2030 1261 4 815 1955 1010
Will compile a list of players by placing at the top the first category followed by the other two.
Tournaments consist two kind of rounds:
Winners of the two semifinal rounds play the final match.
Depending on the number of participants are created one or more groups. The minimum number of players per round is 3, the maximum number depends on the number of participants. Each round includes a game that you play with the first move as South, and a match as North.
In the qualification the groups are automatically calculated by the system according on the number of partecipants.
Players are placed into the groups starting with the first player in the initial player list sequentially down to the last listed player. For example, in a 16-player tournament with 3 groups,
The top listed player goes into Group A, 2nd listed player into Group B, 3rd listed player into Group C, 4th listed player into Group A again and so on.
So, in this example
Group A has the following seeds: #1, #4, #7, #10, #13, and #16.
Group B has the following seeds: #2, #5, #8, #11, #14, and -1.
Group C has the following seeds:
#3, #6, #9, #12, #15, and -1.
(Where -1 is a dummy player so that we can pair the players using Berger's algorithm.)
This is done to try and ensure that in the final round, the best players is left playing for the tournament win.
In the semi-final there are only two groups, a group is formed by the first classified into each group of qualification, the second group is formed by the second classified. In this way, no one plays against the same player.
In the final match there is the only match between the winners of each of the two groups of the semifinal.
The first round (qualification) is formed by selecting players from the above player list according on their KIBA score.
The player who wins a match receives one score and the player who loses does not receive any scores.
At the end of a round the players is sorted in descending order according to the gained score. In the case of draws is adopted a playoff score.
The winner of the semifinal is the winner of the tournament. In case of a tie the two finalists play a playoff game.
In forming the rounds KIBA uses the algorithm of Berger, named after its inventor Johann Berger.
In each of the (N - 1) rounds, N / 2 games are played in parallel.
The algorithm of Berger splits the player list into two halves and pair the top of the first half with the bottom of the second half.
Where there is an odd number of players, the highest number counts as a bye.
In the first round the player number one plays against the last player, 6, player 2 against player 5, up to player 3 against player 4.
Round 1. 1-6 2-5 3-4
Pairings for subsequent rounds are formed by leaving player 1 fixed and moving (n/2) - 1 times all the other player numbers one step in a clockwise direction until the player 1 plays against the penultimate player, 5.
Round 2. 1-2 3-6 4-5 Round 3. 1-3 4-2 5-6 Round 4. 1-4 5-3 6-2 Round 5. 1-5 6-4 2-3
In this way the players play all against all.
Depending on the number of participants will be created one or more groups. The minimum number of players per round is 3, the maximum number depends on the number of participants. Each round includes a game that you play with the first move as South, and a match as North.
Matches are played in parallel. Continuing with the preceding example the player number one plays 10 games contemporaneously (or 8 +2 BYEs):
SOUTH-NORTH 1-6 (or BYE) 1-2 1-3 1-4 1-5 NORTH-SOUTH 6-1 (or BYE) 2-1 3-1 4-1 5-1
The final match is played according to the method best-of-3.
The winner of the final match is the one who wins two matches, the third one is played only if no one has won both the first two previous matches. The first to move is the player with the higher KIBA score.
If a player wins a match he/she gains 1 score.
In case of defeat (abandonment or time-over) he/she doesn't get any scores.
At the end of each round players are classified according to the achieved scores.
If 2 or more players in the first two groups have the same score then KIBA uses the following tie-break method: Neustadtl score which factors in the strength of the opponents. If two players have the same score and the same Tie Break score, KIBA uses their KIBA score;
the winner of the final is the one who will win two matches according to the method best-of-3
Below is an example of how the tie breaking system works:
Rank | Player | ELO | 1 | 2 | 3 | 4 | Scores |
---|---|---|---|---|---|---|---|
3 | Kobe | 1926 | -+12 | -+30 | ++77 | -+154 | 5 |
12 | Oscar | 2069 | +-3 | ++30 | ++77 | ++154 | 7 |
30 | Jan | 1808 | +-3 | --12 | ++77 | +-154 | 4 |
77 | Peter | 1675 | --3 | --12 | --30 | --154 | 0 |
154 | Sock | 1694 | +-3 | --12 | -+30 | ++77 | 4 |
A player's tiebreak score is calculated by adding the sum of the player's points they have defeated (++) to half the sum of the player's points they have drawn against (-+ or +-).
Kobe (3) won against Peter (++77) and drew against Oscar (-+12), Jan (-+30) and Sock (-+154). So Kobe gets 1x0 points from Peter (77), 0.5 x 7 points from Oscar (12), 0.5 x 4 points from Jan (30), 0.5 x 4 points from Sock (154), which sums up to 7.5 tiebreak points.
Oscar (12) won against Jan (++30), Peter (++77) and Sock (++154) and drew against Kobe (+-3). So Oscar gets 1x4 points from Jan (30), 1x0 points from Peter (77), 0.5 x 5 points from Kobe (3), 1 x 4 points from Sock (154), which sums up to 10.5 tiebreak points.
Jan (30) won against Peter (++77), and drew against Kobe (-+3) and Sock (-+154). So Jan gets 1x0 points from Peter (77), 0.5 x 5 points from Kobe (3), 0.5 x 4 points from Sock (154), which sums up to 4.5 tiebreak points.
Sock (154) won against Peter (++77) and drew against Jan (-+30) and Kobe (-+3). So Kobe gets 1x0 points from Peter (77), 0.5 x 5 points from Kobe (3), 0.5 x 4 points from Jan (30) which sums up to 4.5 tiebreak points.
Rank | Player | Country | Scores | Tie-Break | |
---|---|---|---|---|---|
1 | Oscar | Colombia | 7 | 10.5 | 522 |
2 | Kobe | Italia | 5 | 7.5 | 540 |
3 | Jan | Nederland | 4 | 4.5 | 355 |
4 | Sock | France | 4 | 4.5 | 187 |
5 | Peter | Italia | 0 | 0 | 171 |
Tournaments have only one winner.
You are allowed to withdraw from a tournament at any time using the Withdraw link located on the right hand side of each page of your tournament games.
Cheating is absolutely forbidden. Players chat during a match regularly, but in a tournament they should talk about neutral topics. If a player suspects his/her opponent is cheating, immediately inform the Tournament director.
The international master championships of Bao consist of four tournaments.
A final master (Mabingwa) tournament of the best players will announce the first Bingwa KIBA (KIBA Bao Master), BK.
The KIBA championship also provides a ranking by nation.
The list of the championship players is generated according the following criteria:
At the final master (Mabingwa) tournament
participate the best six players in the championship.
The six players will compete in a single round.
The first two players classified will play the final of the
championship.
KIBA will award the title of Bingwa wa KIBA (Master of the KIBA) to the winner of the championship.
At the end of each tournament is also compiled a ranking by
countries.
A country can enter that ranking if it has been represented by
at least two players in the concerned tournament.
For each country the best four scores are added together.
The first two countries in the standings of each tournament
will participate in the tournament for countries.
The three best players of each countries will play in the
tournament.
Each player will play a game against all other three opponents.
A player gets a point for each match won, the winner
country will be the one with more points.
If you have any questions, please contact us!