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Problem Display

PID: 242086 (2k5/K2bR3/3PNN2/8/8/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1936

2k5/K2bR3/3PNN2/8/8/8/8/8

#2

5 + 2

15148	Sadier Collection	2021
5454	Near Snap	2022

SOLUTION

SOUND
Sets
- 1...Ba4
  - 2.Rc7#
- 1...Bb5
  - 2.Rc7#
- 1...Bc6
  - 2.Rc7#
- 1...Bxe6
  - 2.Re8#
- 1...Be8
  - 2.Rc7#
  - 2.Rxe8#
Tries
- 1.Ka8?
  - 1...Bxe6
    - 2.Re8#
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Be8
    - 2.Rc7#
    - 2.Rxe8#
  - 1...Bc6+!
- 1.Se4?
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Bc6
    - 2.Rc7#
  - 1...Be8
    - 2.Rc7#
  - 1...Bxe6!
- 1.Sg4?
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Bc6
    - 2.Rc7#
  - 1...Be8
    - 2.Rc7#
  - 1...Bxe6!
- 1.Sh5?
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Bc6
    - 2.Rc7#
  - 1...Be8
    - 2.Rc7#
  - 1...Bxe6!
- 1.Sh7?
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Bc6
    - 2.Rc7#
  - 1...Be8
    - 2.Rc7#
  - 1...Bxe6!
- 1.Se8?
  - 1...Bxe8
    - 2.Rc7#
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Bc6
    - 2.Rc7#
  - 1...Bxe6!
- 1.Sg8?
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Bc6
    - 2.Rc7#
  - 1...Be8
    - 2.Rc7#
  - 1...Bxe6!
- 1.Rg7?
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Bc6
    - 2.Rc7#
  - 1...Be8
    - 2.Rc7#
  - 1...Bxe6!
- 1.Rh7?
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Bc6
    - 2.Rc7#
  - 1...Be8
    - 2.Rc7#
  - 1...Bxe6!
Keys
- 1.Rf7!
  - 1...Bxe6
    - 2.Rf8#
  - 1...Ba4
    - 2.Rc7#
  - 1...Bb5
    - 2.Rc7#
  - 1...Bc6
    - 2.Rc7#
  - 1...Be8
    - 2.Rc7#

This anticipates 171341(1995)

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- B(a);OGATE::R1(E)
- B(a);N_GUARD,XS(B)::R(E)
Tries
- Try
  - K(D);P-FLIGHT
  - Vars
    - B(a);N_GUARD,XS(B)::R(E)
    - B(a);OGATE::R1(E)
  - Refutation
    - B(a);CHECK
- Try
  - S(C);
  - Vars
    - B(a);OGATE::R1(E)
  - Refutation
    - B(a);XS(B)
- Try
  - S(C);
  - Vars
    - B(a);OGATE::R1(E)
  - Refutation
    - B(a);XS(B)
- Try
  - S(C);
  - Vars
    - B(a);OGATE::R1(E)
  - Refutation
    - B(a);XS(B)
- Try
  - S(C);
  - Vars
    - B(a);OGATE::R1(E)
  - Refutation
    - B(a);XS(B)
- Try
  - S(C);
  - Vars
    - B(a);OGATE,XS(C)::R1(E)
    - B(a);OGATE::R1(E)
  - Refutation
    - B(a);XS(B)
- Try
  - S(C);
  - Vars
    - B(a);OGATE::R1(E)
  - Refutation
    - B(a);XS(B)
- Try
  - R(E);
  - Vars
    - B(a);OGATE::R1(E)
  - Refutation
    - B(a);XS(B)
- Try
  - R(E);
  - Vars
    - B(a);OGATE::R1(E)
  - Refutation
    - B(a);XS(B)
Actual
- R(E);
- Vars
  - B(a);N_GUARD,XS(B)::R(E)
  - B(a);OGATE::R1(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).