Meson Chess Problem Database

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Problem Display

PID: 120606 (6Q1/8/8/4K3/8/4pkp1/4ppp1/8 w - - 0 1)

Hjelle, David

2nd HM., Springaren, 1956

6Q1/8/8/4K3/8/4pkp1/4ppp1/8

#2

2 + 6

6490	yacpdb	2009

SOLUTION

SOUND
Tries
- 1.Qh7?
  - threat
    - 2.Qe4#
    - 2.Qf5#
    - 2.Qh5#
  - 1...e1Q
    - 2.Qh5#
  - 1...e1S
    - 2.Qh5#
  - 1...e1B
    - 2.Qh5#
  - 1...e1R
    - 2.Qh5#
  - 1...f1Q
    - 2.Qf5#
  - 1...f1S
    - 2.Qf5#
  - 1...f1B
    - 2.Qf5#
  - 1...f1R
    - 2.Qf5#
  - 1...g1Q
    - 2.Qe4#
  - 1...g1S
    - 2.Qe4#
  - 1...g1B
    - 2.Qe4#
  - 1...g1R
    - 2.Qe4#
  - 1...Kg4!
Keys
- 1.Qg6!
  - threat
    - 2.Qe4#
    - 2.Qf5#
    - 2.Qh5#
  - 1...e1Q
    - 2.Qh5#
  - 1...e1S
    - 2.Qh5#
  - 1...e1B
    - 2.Qh5#
  - 1...e1R
    - 2.Qh5#
  - 1...f1Q
    - 2.Qf5#
  - 1...f1S
    - 2.Qf5#
  - 1...f1B
    - 2.Qf5#
  - 1...f1R
    - 2.Qf5#
  - 1...g1Q
    - 2.Qe4#
  - 1...g1S
    - 2.Qe4#
  - 1...g1B
    - 2.Qe4#
  - 1...g1R
    - 2.Qe4#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 12
- REMOVED MATES = 0
Sets
Tries
- Try
  - Q(B);
  - Threat
    - DUALS(3)
  - Vars
    - P(a);::QAB(B)
    - P(b);::QAR2(B)
    - P(c);::QAB1(B)
  - Refutation
    - K(e);S_FLIGHT
Actual
- Q(B);
- Threat
  - DUALS(3)
- Vars
  - P(a);::QAB(B)
  - P(b);::QAR2(B)
  - P(c);::QAB1(B)

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).