Booot and Pedone promote to league 1. Both engines led the league without loss after the first half. In the second half Booot increased its lead despite losing a game to Winter, Pedone remained without loss but only had one win in the second half. Winter had +3 performance in the second half of the league and it caught up with Pedone in the last round, but Pedone had a head-to-head tiebreak advantage that ensured its promotion.
Demolito and Gogobello relegate back to league 3. As in league 3 the two engines that promoted from a lower league are relegated back. Gogobello was at the bottom of the league from the start, though it managed a win in the second half. It seemed Demolito would survive the league, Nemorino was in 9th place with a crash tiebreak handicap. In the second half Demolito lost more games, it was still 0.5 points ahead of Nemorino entering the last round. However Nemorino beat ChessBrain in its last game and Demolito lost in the very last game of the league, and they switched places.
Both the promotion and relegation races turned out to be very close in this league, and both were decided in the last round.
The engines to play in league1:
Played in season 17 premier league: Fire, ScorpioNN
Played in season 17 CPU league 1 - DefenChess, Rubichess, rofChade, Xiphos, Arasan
Missed season 17 due to crashes - Fritz
Promoted from league 2 - Booot, Pedone
Notable games
Game 2, Pedone - Demolito: Pedone gave two rooks for three minor pieces, then created a passer and pushed it to the 7th rank. Demolito gave a rook for a knight to capture the passer, the BN vs R ending was a win for white.
Game 4, Winter - ChessBrain: The game reached a RB vs RBN position, white 3 pawns up. Winter created connected passers, ChessBrain captured one and lost its bishop. Winter slowly outplayed ChessBrain, it was 3 pawns up in a rook ending when the game was adjudicated.
Game 13, Winter - Demolito: The engines played a RB vs RN ending for a many moves, Winter was a pawn up but the game seemed to be heading for a draw. Demolito went wrong somewhere, Winter managed to push a pawn forward and Demolito eventually traded a rook for it and lost the game.
Game 15, Booot - ChessBrain: Booot pushed a passer to the 7th rank in a RRB vs RRB position. After exchanging a pair of rooks ChessBrain blundered, Booot slowly brought its king forward to support the passer. This forced a trade of a rook for the passer giving Booot the win.
Game 17, Chiron - Booot: Booot was up a pawn early with a pawn majority on the king side. The game reached a RBN vs RBN position and ended after Chiron lost a bishop for a pawn.
Game 18, Demolito - Wasp: Demolito missed a win in a RB vs RN ending.
Game 20, Pedone - Nemorino: Nemorino blundered in a RB vs RB position, allowing Pedone to reduce to a winning rook ending.
Game 22, Winter - Pedone: Pedone opened files, went a pawn up and took the initiative. Winter held on for a while, but a combination of an advanced passer and an attack on the white king caused the defense to collapse.
Game 28, Vajolet - Booot: Booot gave a rook for a bishop and slowly developed a strong attack on the white king. Too many white pieces were stuck on the queen side, Vajolet began losing material and the game was adjudicated.
Game 29, Pedone - Wasp: Pedone pushed the black pieces back, then reduced to a QRN vs QRN position. Wasp captured the black knight through an attack on the king, leading to a winning RN vs R ending.
Game 30, Nemorino - Winter: Winter played a RR vs RBN ending better. The black king moved forward and created back rank threats, Nemorino lost material and the game.
Game 32, Wasp - Nemorino: Wasp was up a pawn in a QRR vs QRR position, with a pair of connected passers. Nemorino gave a pawn and pushed a passer to the 2nd rank, the double rook ending was a win for white.
Game 35, Chiron - Demolito: Demolito created an advanced passer on the queen side early in the game. Then it opened the king side and attacked the white king. Chiron couldn't handle both threats, the game was adjudicate before Demolito won material.
Game 37, Vajolet - Chiron: Vajolet chose a Q vs BBN imbalace early in the game. The white queen moved forward and captured pawns, Chiron captured a rook for a bishop, an attack on the white king led to more material gain for the win.
Game 39, Nemorino - Booot: Nemorino was up a rook for a bishop, in a QRR vs QRB position Booot had a passer and the white king was vulnerable on the long diagonal. Booot created a connected pair of passers on the other side and the white defense collapsed. Nemorino also crashed instead of resigning.
Game 40, Winter - Wasp: Winter gave pawns to open the king side, then regained the pawns. The black pawn structure was weak, after some preparations Winter reduced to a winning rook ending.
Scores after 9 rounds: Booot Pedone +5, Winter +3, Wasp Chiron 0, Vajolet Demolito -1, ChessBrain -2, Nemorino -3, Gogobello -6. Booot and Pedone are leading the table, both without loss. Winter is not far behind. At the bottom Gogobello is on its way to relegate back to league 3. The second relegation spot is still contested.
Game 50, Booot - Wasp: Booot outplayed Wasp in a QRB vs QRB position. The black king was exposed and there were more pawn targets for Booot. Wasp held on for a while but eventually its king fell in a mating net.
Game 54, Nemorino - Demolito: Nemorino traded RB for Q and a few moves later saw it was a bad idea. The game reached a Q vs RN ending, Demolito was two pawns up with an advanced passer. Demolito promoted a pawn before the game was adjudicated.
Game 58, Demolito - Winter: Demolito gave a rook to get rid of an advanced passer and a strong bishop. Winter used the white king's vulnerability to reduce to a winning N vs R ending.
Game 59, Chiron - Wasp: After 80 moves of mostly shuffling the position opened up. Chiron pushed a passer to the 6th rank in a RRB vs RRN position, Wasp gave a rook for a bishop to get rid of it. The R vs N ending was a win for white.
Game 61, ChessBrain - Gogobello: ChessBrain gave a rook for a bishop early in the game, without getting anything out of it. The game reached a BB vs RN position, after trading a few pawns Gogobello created a passer. The white bishops couldn't stop the black king moving forward for support, the game ended in a tablebase win for black. First win in the league for Gogobello.
Game 62, Booot - Chiron: The black king was vulnerable on light squares and Booot slowly developed a king side attack. Chiron's queen side passer was a weak counter, Booot started to gain material and the game was adjudicated.
Game 63, Wasp - Demolito: Wasp had connected passers in the center, Demolito gave a bishop to remove them. The game reached a RBB vs RN position, black 3 pawns up. The white pieces were stronger, Wasp trapped the black rook and captured it for a bishop, the material advantage was enough for a win.
Game 64, Winter - Vajolet: Vajolet had weak pawns on the queen side, Winter captured one and reduced to a RB vs RB ending a pawn up. It took a while for Winter to capture a second pawn, create a passer and win.
Game 69, Demolito - Booot: In a RRB vs RRN position Demolito went 3 pawns up but because of a mate threat it had to give a rook for a knight. Booot moved its king forward and used the same mate threat to reduce to a winning B vs R ending.
Game 70, Chiron - ChessBrain: Chiron was up a pawn with a passer from the start, it gave away both of these and the game reduced to a BN vs NN position. ChessBrain took the initiative, created connected passers in the center and pushed them forward. Chiron gave two pawns to block the passers, and the game was adjudicated.
Scores after 14 rounds: Booot +8, Pedone +6, Winter +5, Chiron Vajolet Wasp -1, ChessBrain -2, Demolito -3, Nemorino -4, Gogobello -7. Booot leads with a 1 point gap to 2nd place, Winter got closer to Pedone, one of them will also promote. Pedone has a head-to-head tiebreak advantage over Winter. At the bottom Demolito changed places with ChessBrain, both are still in danger. Nemorino's crash means it loses any tiebreak.
Scores after 16 rounds: Booot +8, Pedone +6, Winter +5, Chiron Vajolet Wasp -1, ChessBrain -2, Demolito -3, Nemorino -4, Gogobello -7. No change in the table after 10 straight draws. Winter drew both Nemorino and Gogobello, missing a chance to move ahead. Pedone drew against Booot, and Demolito drew against ChessBrain.
Another round of draws in round 17. Demolito drew against Gogobello. One round to go, Pedone needs a draw to promote, Demolito needs a draw to be safe, Winter and Nemorino need wins.
Game 87, Winter - Booot: Winter went a pawn up and created a passer early in the game. The engines exchanged pieces and pawns until reaching a N vs B ending, Winter captured another pawn and two white passers were too many for Booot. Booot's first and only loss in the league, Winter keeps its hope alive.
Game 88, Nemorino - ChessBrain: ChessBrain gave a rook for a knight and pawn early in the game. Nemorino was better in a QR vs QB position, it took a while but Nemorino reduced to a winning R vs B ending. Nemorino has a chance to survive.
Game 89, Pedone - Chiron: Pedone was never in danger, the game ended in a draw. Pedone promotes by a tiebreak with Winter.
Game 90, Vajolet - Demolito: Demolito had a connected pair of passers on the queen side. Vajolet blocked them, created a central passer and reduced to a RRB vs RRN position. The white passer moved to the 7th rank supported by the rooks, Vajolet used it to reach a winning R vs N ending. With this loss Demolito is relegated, Nemorino is safe.
No comments:
Post a Comment