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Problem Display

PID: 172835 (8/8/8/8/Np4Q1/1P2p3/7K/4k3 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2000

8/8/8/8/Np4Q1/1P2p3/7K/4k3

#3

4 + 3

6490	yacpdb	2018

SOLUTION

SOUND
Sets
- 1...e2
  - 2.Qd4
    - 2...Kf1
      - 3.Qg1#
Tries
- 1.Kg3?
  - 1...e2
    - 2.Qd4
      - 2...Kf1
        3.Qf2#
  - 1...Kd2!
- 1.Sc5?
  - threat
    - 2.Se4
      - 2...Kf1
        3.Qd1#
      - 2...e2
        3.Qg1#
  - 1...Kf1
    - 2.Sd3
      - 2...e2
        3.Qf3#
        3.Qh3#
        3.Qf5#
        3.Qg1#
        3.Qg2#
        3.Qf4#
    - 2.Qd1+
      - 2...Kf2
        3.Sd3#
        3.Se4#
  - 1...Kf2
    - 2.Sd3+
      - 2...Kf1
        3.Qd1#
        3.Qf3#
        3.Qg2#
  - 1...e2
    - 2.Qd4
      - 2...Kf1
        3.Qg1#
  - 1...Kd2!
Keys
- 1.Sb2!
  - threat
    - 2.Qd1+
      - 2...Kf2
        3.Sd3#
  - 1...Kf1
    - 2.Sd3
      - 2...e2
        3.Qf3#
        3.Qh3#
        3.Qf5#
        3.Qg1#
        3.Qg2#
        3.Qf4#
    - 2.Qd1+
      - 2...Kf2
        3.Sd3#
  - 1...Kd2
    - 2.Qd1+
      - 2...Kc3
        3.Sa4#
  - 1...Kf2
    - 2.Sd3+
      - 2...Kf1
        3.Qd1#
        3.Qf3#
        3.Qg2#
  - 1...e2
    - 2.Qd4
      - 2...Kf1
        3.Qg1#

FEATURES

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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).