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Problem Display

PID: 57240 (8/8/3p4/3Kn3/3R4/1pk5/4P3/2BB4 w - - 0 1)

Onkoud, Abdelaziz

Troll, 1996

8/8/3p4/3Kn3/3R4/1pk5/4P3/2BB4

#2

5 + 4

5454	Near Snap	2007

SOLUTION

SOUND
Sets
- 1...Sd3
  - 2.Rc4#
- 1...Sf3
  - 2.Rc4#
- 1...Sc4
  - 2.Rxc4#
- 1...Sg4
  - 2.Rc4#
- 1...Sc6
  - 2.Rc4#
- 1...Sg6
  - 2.Rc4#
- 1...Sd7
  - 2.Rc4#
- 1...Sf7
  - 2.Rc4#
- 1...b2
  - 2.Bd2#
Tries
- 1.Ra4?
  - 1...Sd3
    - 2.Rc4#
  - 1...Sf3
    - 2.Rc4#
  - 1...Sc4
    - 2.Rxc4#
  - 1...Sg4
    - 2.Rc4#
  - 1...Sc6
    - 2.Rc4#
  - 1...Sg6
    - 2.Rc4#
  - 1...Sd7
    - 2.Rc4#
  - 1...Sf7
    - 2.Rc4#
  - 1...b2!
- 1.Rb4?
  - threat
    - 2.Rxb3#
  - 1...b2
    - 2.Rb3#
  - 1...Kxb4!
- 1.Re4?
  - 1...Sc4
    - 2.Rxc4#
  - 1...Sd3
    - 2.Rc4#
  - 1...Sf3
    - 2.Rc4#
  - 1...Sg4
    - 2.Rc4#
  - 1...Sc6
    - 2.Rc4#
  - 1...Sg6
    - 2.Rc4#
  - 1...Sd7
    - 2.Rc4#
  - 1...Sf7
    - 2.Rc4#
  - 1...b2!
- 1.Rf4?
  - 1...Sc4
    - 2.Rxc4#
  - 1...Sd3
    - 2.Rc4#
  - 1...Sf3
    - 2.Rc4#
  - 1...Sg4
    - 2.Rc4#
  - 1...Sc6
    - 2.Rc4#
  - 1...Sg6
    - 2.Rc4#
  - 1...Sd7
    - 2.Rc4#
  - 1...Sf7
    - 2.Rc4#
  - 1...b2!
Keys
- 1.Ba3!
  - 1...Sd3
    - 2.Rxd3#
  - 1...Sf3
    - 2.Rd3#
  - 1...Sc4
    - 2.Rd3#
  - 1...Sg4
    - 2.Rd3#
  - 1...Sc6
    - 2.Rd3#
  - 1...Sg6
    - 2.Rd3#
  - 1...Sd7
    - 2.Rd3#
  - 1...Sf7
    - 2.Rd3#
  - 1...b2
    - 2.Bb4#

Anticipated by 3063(1918)

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- S(c);N_GUARD::R1(D)
- S(c);N_GUARD::R1(D),XS(c)
- P(a);SBLOCK::B(A)
Tries
- Try
  - R(D);
  - Vars
    - S(c);N_GUARD::R1(D)
    - S(c);N_GUARD::R1(D),XS(c)
  - Refutation
    - P(a);
- Try
  - R(D);
  - Threat
    - R1(D),XP(a)
  - Vars
    - P(a);::R1(D)
  - Refutation
    - K(b);S_FLIGHT,XR(D)
- Try
  - R(D);
  - Vars
    - S(c);N_GUARD::R1(D),XS(c)
    - S(c);N_GUARD::R1(D)
  - Refutation
    - P(a);
- Try
  - R(D);
  - Vars
    - S(c);N_GUARD::R1(D),XS(c)
    - S(c);N_GUARD::R1(D)
  - Refutation
    - P(a);
Actual
- B(A);
- Vars
  - S(c);N_GUARD::R1(D),XS(c)
  - S(c);N_GUARD::R1(D)
  - P(a);SBLOCK::B(A)

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).