Market icon

Какую цену Биткоин достигнет 20 марта?

Market icon

Какую цену Биткоин достигнет 20 марта?

12AM

12AM Mar 21

12AM

12AM Mar 21

NEW

$17,722 Объем

Mar 21, 2026
Polymarket

$17,722 Объем

Polymarket

↑ 78 000

$220 Объем

1%

↑ 77 000

$165 Объем

1%

↑ 76 000

$106 Объем

2%

↑ 75 000

$25 Объем

4%

↑ 74 000

$63 Объем

9%

↑ 73 000

$971 Объем

25%

↑ 72 000

$780 Объем

48%

↑ 71,000

$139 Объем

84%

↓ 70 000

$227 Объем

74%

↓ 69 000

$2,346 Объем

40%

↓ 68,000

$2,618 Объем

18%

↓ 67,000

$2,800 Объем

7%

↓ 66 000

$6,734 Объем

2%

↓ 65 000

$165 Объем

1%

↓ 64 000

$165 Объем

1%

↓ 63,000

$215 Объем

1%

This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.

This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No".

The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar.

Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.
Объем
$17,722
Дата окончания
Mar 21, 2026
Открытие рынка
Mar 20, 2026, 12:00 AM ET
This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.
This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1-minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "High" price equal to or greater than the price specified in the title. Otherwise, this market will resolve to "No". The resolution source for this market is Binance, specifically the BTC/USDT "High" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.This market will immediately resolve to "Yes" if any Binance 1 minute candle for Bitcoin (BTC/USDT) on the date specified in the title, between 12:00 AM ET and 11:59 PM ET has a final "Low" price equal to or lower than the price specified in the title. Otherwise, this market will resolve to "No." The resolution source for this market is Binance, specifically the BTC/USDT "Low" prices available at https://www.binance.com/en/trade/BTC_USDT, with the chart settings on "1m" for one-minute candles selected on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance BTC/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.

Не доверяй внешним ссылкам.

Часто задаваемые вопросы

«Какую цену Биткоин достигнет 20 марта?» — это рынок прогнозов на Polymarket с 16 возможными исходами, где трейдеры покупают и продают акции на основе своих прогнозов. Текущий лидирующий исход — «↑ 71,000» с 84%, за ним следует «↓ 70 000» с 74%. Цены отражают вероятности сообщества в реальном времени. Например, акция по цене 84¢ означает, что рынок коллективно оценивает вероятность этого исхода в 84%. Эти коэффициенты постоянно меняются. Акции правильного исхода можно обменять на $1 каждую при разрешении рынка.

На сегодняшний день «Какую цену Биткоин достигнет 20 марта?» сгенерировал общий объём торгов $17.7K с момента запуска рынка Mar 20, 2026. Такой уровень активности отражает высокую вовлечённость сообщества Polymarket и гарантирует, что текущие коэффициенты формируются широким кругом участников рынка. Ты можешь отслеживать движение цен в реальном времени и торговать любым исходом прямо на этой странице.

Чтобы торговать на «Какую цену Биткоин достигнет 20 марта?», просмотри 16 доступных исходов на этой странице. Каждый исход показывает текущую цену, представляющую подразумеваемую вероятность рынка. Чтобы занять позицию, выбери исход, который считаешь наиболее вероятным, выбери «Да» для торговли в его пользу или «Нет» для торговли против, введи сумму и нажми «Торговать». Если твой выбранный исход окажется верным, твои акции «Да» принесут $1 каждая. Если нет — $0. Ты также можешь продать акции до разрешения.

Текущий фаворит для «Какую цену Биткоин достигнет 20 марта?» — «↑ 71,000» с 84%, что означает, что рынок оценивает вероятность этого исхода в 84%. Следующий ближайший исход — «↓ 70 000» с 74%. Эти коэффициенты обновляются в реальном времени по мере покупки и продажи акций. Заходи чаще или добавь страницу в закладки.

Правила разрешения «Какую цену Биткоин достигнет 20 марта?» точно определяют, что должно произойти, чтобы каждый исход был объявлен победителем, включая официальные источники данных, используемые для определения результата. Ты можешь просмотреть полные критерии разрешения в разделе «Правила» на этой странице над комментариями. Мы рекомендуем внимательно прочитать правила перед торговлей, так как они определяют точные условия, особые случаи и источники.