In particular, we’re going to discuss the same-color bishop endgame. The attacking side has one pawn, and the defender has none.
If the defender can sacrifice their bishop for the last pawn the game is drawn, so the attacker must proceed carefully.
What the Defender Wants in this Ending
The position is completely drawn if the defending king can reach a square in front of the pawn opposite the color of the bishops. The king stays put and the defender moves their bishop around forever … or until they can call over the Arbiter or TD and claim a draw. Here’s an example:
Things get much more complicated if the defending king is behind the advancing pawn. In that case, the bishop desperately tries to control a square the pawn needs to cross in order to prevent it from queening. The attacking king and bishop look to attack the defending bishop, forcing it to move and give up control of the pawn’s path.
This is why you nearly always want your king to blockade passed pawns in the endgame: he can control all of the squares around him, and it’s harder to push him away than a rook, bishop, or knight!
The Black bishop can stop the pawn on either the long b8-h2 or mini a7-b8 diagonal. If White can gain control of both diagonals, the Black cleric will be unable to stop the pawn.
Chase the Bishop!
More Room to Operate
Notice that Black lost because of the short a7-b8 diagonal. To draw, Centurini taught us that the defender usually needs both diagonals to be at least four squares in length. Then, there will always be at least one square on one of the diagonals that the attacker cannot control.
Here’s a famous example of successful defense:
Hopefully you now understand this classic bishop endgame if you previously struggled with it!
Boris Spassky (born 1937) was the tenth World Chess Champion (1969-1972). Before that, however, he was one of the greatest prodigies of early modern professional chess.
Boris Spassky. Photo: Britannica.com
Born in Leningrad (now St. Petersburg), Spassky defeated Mikhail Botvinnik in a simul as a ten-year-old in 1947, a year before Botvinnik became World Champion.
With a third-place finish in his very first USSR Championship, Spassky qualified for the 1955 Gothenburg Interzonal. At Antwerp he captured the World Junior Championship a point ahead of Edmar Mednis. He next qualified for the 1956 Amsterdam Candidates Tournament — earning an automatic Grandmaster title.
At 18 years old, Spassky became the youngest GM ever, eclipsing Tigran Petrosian‘s record by five years.
He established himself as a top player in the early 1960s. Highlights include the 29th USSR Championship (Fall 1961) and the 1964 Moscow zonal.
Spassky battled through the World Championship cycle to earn a title match with Petrosian in 1966. The match went the full 24 games, but Iron Tigran narrowly retained his title.
Undeterred, Spassky immediately won the Second Piatigorsky Cup. In the next Championship cycle he defeated Petrosian in June 1969 to become the new Champion.
Why he is underrated
Unfortunately, Spassky was outshone by two meteors: first Tal, then Fischer.
Mikhail Talwas born less than three months before Spassky. He won back-to-back USSR Championships, an Interzonal, a Candidates Tournament, and a World Championship match within four years! Just 23 years old, he shattered the record for youngest World Champion ever.
Bobby Fischer broke Spassky’s youngest-ever GM record by three years. Later, he won 20 consecutive games en-route to victory in the 1970 Interzonal and 1971 Candidates series with tallies of 6-0, 6-0, and 6½-2½. Then he took Spassky’s World Championship title in 1972.
This is a loss for chess! The casual fans who only know Spassky as “the guy who lost to Fischer” should play through some of his best games — they are as enjoyable and imaginative as those of any player in chess history, full stop.
After losing his title, Spassky won probably the strongest-ever USSR Championship, the 41st, in October 1973. The field included established stars like Lev Polugaevsky, Viktor Kortschnoj, Efim Geller, Paul Keres, and Mark Taimanov, youngsters Evgeny Sveshnikov and Alexander Beliavsky … and four other World Champions — Smyslov, Tal, Petrosian, and Karpov.