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Problem Display

PID: 272080 (8/2pNp3/3kB2B/2pPp2K/q5p1/6P1/8/8 w - - 0 1)

Swords, WJ

The Problemist, 1957

8/2pNp3/3kB2B/2pPp2K/q5p1/6P1/8/8

#2

6 + 7

SOLUTION

SOUND
Sets
- 1...e4
  - 2.Bf4#
Keys
- 1.Sf6!
  - 1...Qe8+
    - 2.Sxe8#
  - 1...exf6
    - 2.Bf8#
  - 1...c4
    - 2.Se4#
  - 1...e4
    - 2.Bf4#
  - 1...c6
    - 2.Se8#
  - 1...Qd1
    - 2.Se4#
    - 2.Se8#
  - 1...Qc2
    - 2.Se8#
  - 1...Qb3
    - 2.Se4#
    - 2.Se8#
  - 1...Qb5
    - 2.Se4#
  - 1...Qc6
    - 2.Se4#
  - 1...Qd7
    - 2.Se4#
  - 1...Qa1
    - 2.Se4#
    - 2.Se8#
  - 1...Qa2
    - 2.Se4#
    - 2.Se8#
  - 1...Qa3
    - 2.Se4#
    - 2.Se8#
  - 1...Qb4
    - 2.Se8#
  - 1...Qc4
    - 2.Se8#
  - 1...Qd4
    - 2.Se8#
  - 1...Qe4
    - 2.Sxe4#
    - 2.Se8#
  - 1...Qf4
    - 2.Se8#
  - 1...Qa5
    - 2.Se4#
    - 2.Se8#
  - 1...Qa6
    - 2.Se4#
    - 2.Se8#
  - 1...Qa7
    - 2.Se4#
    - 2.Se8#
  - 1...Qa8
    - 2.Se4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 13
- REMOVED MATES = 0
Sets
- P(d);OGATEB::B(E)
Actual
- S(F);
- Vars
  - Q(a);CHECK,N_GUARD::S(F),XQ(a)
  - P(g);OGATEB,XS(F)::B(E)
  - P(c);S_CUTQ(a)::S(F)
  - P(d);OGATEB::B(E)
  - P(f);S_CUTQ(a)::S(F)
  - Q(a);N_GUARD::S(F)

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).