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Problem Display

PID: 12296 (4r3/8/1R6/3p1N2/1NkP4/2n5/1BP5/4bK2 w - - 0 1)

Ionescu, V

Problem (Zagreb), 1977

4r3/8/1R6/3p1N2/1NkP4/2n5/1BP5/4bK2

#2

7 + 5

SOLUTION

SOUND
Sets
- 1...Sb1
  - 2.Sd6#
- 1...Sd1
  - 2.Sd6#
- 1...Sa2
  - 2.Sd6#
- 1...Se2
  - 2.Sd6#
- 1...Sa4
  - 2.Sd6#
- 1...Se4
  - 2.Se3#
Tries
- 1.Sa2?
  - threat
    - 2.Rb4#
  - 1...Sxa2
    - 2.Sd6#
  - 1...Sb1
    - 2.Sd6#
  - 1...Sd1
    - 2.Sd6#
  - 1...Se2
    - 2.Sd6#
  - 1...Sa4
    - 2.Sd6#
  - 1...Se4
    - 2.Se3#
  - 1...Sb5
    - 2.Rc6#
  - 1...Rb8!
- 1.Sa6?
  - threat
    - 2.Rb4#
  - 1...Sb1
    - 2.Sd6#
  - 1...Sd1
    - 2.Sd6#
  - 1...Sa2
    - 2.Sd6#
  - 1...Se2
    - 2.Sd6#
  - 1...Sa4
    - 2.Sd6#
  - 1...Se4
    - 2.Se3#
  - 1...Sb5
    - 2.Rc6#
  - 1...Rb8!
- 1.Sc6?
  - threat
    - 2.Sd6#
    - 2.Sa5#
    - 2.Rb4#
  - 1...Rb8
    - 2.Se3#
    - 2.Sd6#
    - 2.Sa5#
    - 2.Se5#
  - 1...Re6
    - 2.Sa5#
    - 2.Rb4#
  - 1...Ra8
    - 2.Se3#
    - 2.Sd6#
    - 2.Se5#
    - 2.Rb4#
  - 1...Rd8
    - 2.Se3#
    - 2.Sa5#
    - 2.Se5#
    - 2.Rb4#
  - 1...Rf8
    - 2.Sa5#
    - 2.Se5#
    - 2.Rb4#
  - 1...Bg3
    - 2.Sa5#
    - 2.Rb4#
  - 1...Sb1
    - 2.Sd6#
  - 1...Sd1
    - 2.Sd6#
  - 1...Sa2
    - 2.Sd6#
  - 1...Se2
    - 2.Sd6#
  - 1...Sa4
    - 2.Sd6#
  - 1...Se4
    - 2.Se3#
  - 1...Sb5!
Keys
- 1.Sd3!
  - threat
    - 2.Rb4#
  - 1...Rb8
    - 2.Se5#
  - 1...Sb1
    - 2.Sd6#
  - 1...Sd1
    - 2.Sd6#
  - 1...Sa2
    - 2.Sd6#
  - 1...Se2
    - 2.Sd6#
  - 1...Sa4
    - 2.Sd6#
  - 1...Se4
    - 2.Se3#
  - 1...Sb5
    - 2.Rc6#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
- S(b);::S(F)
- S(b);S_CUTR(e)::S(F)
Tries
- Try
  - S(D);
  - Threat
    - R1(G)
  - Vars
    - S(b);XS(D)::S(F)
    - S(b);::S(F)
    - S(b);S_CUTR(e)::S(F)
    - S(b);SBLOCK::R(G)
  - Refutation
    - R(e);
- Try
  - S(D);
  - Threat
    - R1(G)
  - Vars
    - S(b);::S(F)
    - S(b);S_CUTR(e)::S(F)
    - S(b);SBLOCK::R(G)
  - Refutation
    - R(e);
- Try
  - S(D);
  - Threat
    - DUALS(3)
  - Vars
    - S(b);::S(F)
    - S(b);S_CUTR(e)::S(F)
  - Refutation
    - S(b);
Actual
- S(D);
- Threat
  - R1(G)
- Vars
  - R(e);N_GUARD::S(D)
  - S(b);::S(F)
  - S(b);S_CUTR(e)::S(F)
  - S(b);SBLOCK::R(G)

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).