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Problem Display

PID: 235174 (8/8/6N1/3n4/1p2R3/1P1k1nN1/1P1p4/K2B4 w - - 0 1)

Groeneveld, Cornelis

Schach, 1954

8/8/6N1/3n4/1p2R3/1P1k1nN1/1P1p4/K2B4

#2

7 + 5

15148	Sadier Collection	2021

SOLUTION

SOUND
Sets
- 1...Se1
  - 2.Se5#
- 1...Sg1
  - 2.Se5#
- 1...Sh2
  - 2.Se5#
- 1...Sd4
  - 2.Se5#
- 1...Sh4
  - 2.Se5#
- 1...Se5
  - 2.Sxe5#
- 1...Sg5
  - 2.Se5#
- 1...Sc3
  - 2.Sf4#
- 1...Se3
  - 2.Sf4#
- 1...Sf4
  - 2.Sxf4#
- 1...Sb6
  - 2.Sf4#
- 1...Sf6
  - 2.Sf4#
- 1...Sc7
  - 2.Sf4#
- 1...Se7
  - 2.Sf4#
Tries
- 1.Kb1?
  - threat
    - 2.Bc2#
    - 2.Be2#
  - 1...Se1
    - 2.Se5#
    - 2.Be2#
  - 1...Sg1
    - 2.Se5#
    - 2.Bc2#
  - 1...Sd4
    - 2.Se5#
  - 1...Se3
    - 2.Sf4#
    - 2.Be2#
  - 1...Sf4
    - 2.Sxf4#
    - 2.Bc2#
  - 1...Sc3+!
- 1.Ka2?
  - 1...Se1
    - 2.Se5#
  - 1...Sg1
    - 2.Se5#
  - 1...Sh2
    - 2.Se5#
  - 1...Sd4
    - 2.Se5#
  - 1...Sh4
    - 2.Se5#
  - 1...Se5
    - 2.Sxe5#
  - 1...Sg5
    - 2.Se5#
  - 1...Se3
    - 2.Sf4#
  - 1...Sf4
    - 2.Sxf4#
  - 1...Sb6
    - 2.Sf4#
  - 1...Sf6
    - 2.Sf4#
  - 1...Sc7
    - 2.Sf4#
  - 1...Se7
    - 2.Sf4#
  - 1...Sc3+!
Keys
- 1.Sf5!
  - 1...Kxe4
    - 2.Bc2#
  - 1...Se1
    - 2.Rd4#
  - 1...Sg1
    - 2.Rd4#
  - 1...Sh2
    - 2.Rd4#
  - 1...Sd4
    - 2.Rxd4#
  - 1...Sh4
    - 2.Rd4#
  - 1...Se5
    - 2.Rd4#
  - 1...Sg5
    - 2.Rd4#
  - 1...Sc3
    - 2.Re3#
  - 1...Se3
    - 2.Rxe3#
  - 1...Sf4
    - 2.Re3#
  - 1...Sb6
    - 2.Re3#
  - 1...Sf6
    - 2.Re3#
  - 1...Sc7
    - 2.Re3#
  - 1...Se7
    - 2.Re3#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 14
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- S(c);N_GUARD::S(G)
- S(c);N_GUARD::S(G),XS(c)
- S(e);N_GUARD::S(G)
- S(e);N_GUARD::S(G),XS(e)
Tries
- Try
  - K(A);P-FLIGHT
  - Threat
    - DUALS(2)
  - Vars
    - S(c);N_GUARD::S(G)
  - Refutation
    - S(e);CHECK
- Try
  - K(A);P-FLIGHT
  - Vars
    - S(c);N_GUARD::S(G)
    - S(c);N_GUARD::S(G),XS(c)
    - S(e);N_GUARD::S(G)
    - S(e);N_GUARD::S(G),XS(e)
  - Refutation
    - S(e);CHECK
Actual
- S(E);
- Vars
  - K(b);S_FLIGHT,XR(F)::B(B)
  - S(c);N_GUARD::R1(F)
  - S(c);N_GUARD::R1(F),XS(c)
  - S(e);N_GUARD::R1(F)
  - S(e);N_GUARD::R1(F),XS(e)

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).