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Problem Display

PID: 67496 (4K3/1np1p3/bPpbkp2/pr2pr2/4n3/3Q4/8/8 w - - 0 1)

Kipping, Cyril Stanley

Chess, 1948

4K3/1np1p3/bPpbkp2/pr2pr2/4n3/3Q4/8/8

#2

3 + 13

SOLUTION

SOUND
Sets
- 1...Ba3
  - 2.Qd7#
- 1...Bb4
  - 2.Qd7#
- 1...Bc5
  - 2.Qd7#
- 1...Sec5
  - 2.Qc4#
- 1...Sbc5
  - 2.Qc4#
- 1...c5
  - 2.Qc4#
Keys
- 1.bxc7!
  - threat
    - 2.c8Q#
    - 2.c8B#
  - 1...Bxc7
    - 2.Qd7#
  - 1...Rf1
    - 2.c8Q#
    - 2.c8B#
  - 1...Rf2
    - 2.c8Q#
    - 2.c8B#
  - 1...Rf3
    - 2.c8Q#
    - 2.c8B#
  - 1...Rf4
    - 2.c8Q#
    - 2.c8B#
  - 1...Rg5
    - 2.c8Q#
    - 2.c8B#
  - 1...Rh5
    - 2.c8Q#
    - 2.c8B#
  - 1...Rd5
    - 2.c8Q#
    - 2.c8B#
  - 1...Rb1
    - 2.c8Q#
    - 2.c8B#
  - 1...Rb2
    - 2.c8Q#
    - 2.c8B#
  - 1...Rb3
    - 2.c8Q#
    - 2.c8B#
  - 1...Rb4
    - 2.c8Q#
    - 2.c8B#
  - 1...Rc5
    - 2.c8Q#
    - 2.c8B#
  - 1...Rb6
    - 2.c8Q#
    - 2.c8B#
  - 1...Ba3
    - 2.Qd7#
    - 2.c8Q#
    - 2.c8B#
  - 1...Bb4
    - 2.Qd7#
    - 2.c8Q#
    - 2.c8B#
  - 1...Bc5
    - 2.Qd7#
    - 2.c8Q#
    - 2.c8B#
  - 1...Sd2
    - 2.c8Q#
    - 2.c8B#
  - 1...Sf2
    - 2.c8Q#
    - 2.c8B#
  - 1...Sc3
    - 2.c8Q#
    - 2.c8B#
  - 1...Sg3
    - 2.c8Q#
    - 2.c8B#
  - 1...Sec5
    - 2.Qc4#
  - 1...Sg5
    - 2.c8Q#
    - 2.c8B#
  - 1...Sbc5
    - 2.Qc4#
  - 1...Sd8
    - 2.cxd8S#
  - 1...a4
    - 2.c8Q#
    - 2.c8B#
  - 1...c5
    - 2.Qc4#
    - 2.c8Q#
    - 2.c8B#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 4
Sets
- B(h);OGATE::QAB1(A)
- S(a);S_CUTR(c)::QAB(A)
- S(k);S_CUTR(c)::QAB(A)
- P(g);S_CUTR(c)::QAB(A)
Actual
- P(B);XP(l)
- Threat
  - P=Q
- Vars
  - B(h);OGATE,XP(B)::QAB1(A)
  - R(e);::P=Q
  - R(c);::P=Q
  - S(a);::P=Q
  - S(a);S_CUTR(c)::QAB(A)
  - S(k);S_CUTR(c)::QAB(A)
  - S(k);OGATE::PXS(k)=S
  - P(b);::P=Q

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).