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Problem Display

PID: 201647 (7K/1p2N3/1B1ppn2/4k3/5R2/3bNnP1/8/8 w - - 0 1)

Szekeres, Karoly

Bekes Sakk, 1922

7K/1p2N3/1B1ppn2/4k3/5R2/3bNnP1/8/8

#2

6 + 7

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...Bb1
  - 2.Sc4#
- 1...Bf1
  - 2.Sg6#
- 1...Bc2
  - 2.Sc4#
- 1...Be2
  - 2.Sg6#
- 1...Bc4
  - 2.Sxc4#
  - 2.Sg6#
- 1...Be4
  - 2.Sc4#
- 1...Bb5
  - 2.Sg6#
- 1...Bf5
  - 2.Sc4#
- 1...Ba6
  - 2.Sg6#
- 1...Bg6
  - 2.Sc4#
  - 2.Sxg6#
- 1...Bh7
  - 2.Sc4#
- 1...Se1
  - 2.Bd4#
- 1...Sg1
  - 2.Bd4#
- 1...Sd2
  - 2.Bd4#
- 1...Sh2
  - 2.Bd4#
- 1...Sd4
  - 2.Bxd4#
- 1...Sh4
  - 2.Bd4#
- 1...Sg5
  - 2.Bd4#
- 1...Se4
  - 2.Sg4#
  - 2.Sg6#
- 1...Sg4
  - 2.Sxg4#
- 1...Sd5
  - 2.Sg4#
- 1...Sh5
  - 2.Sg4#
- 1...Sd7
  - 2.Sg4#
- 1...Sh7
  - 2.Sg4#
- 1...Se8
  - 2.Sg4#
- 1...Sg8
  - 2.Sg4#
- 1...d5
  - 2.Bc7#
Tries
- 1.Re4+?
  - 1...Bxe4
    - 2.Sc4#
  - 1...Sxe4
    - 2.Sg4#
  - 1...Kxe4!
Keys
- 1.Ba7!
  - 1...d5
    - 2.Bb8#
  - 1...Bb1
    - 2.Sc4#
  - 1...Bf1
    - 2.Sg6#
  - 1...Bc2
    - 2.Sc4#
  - 1...Be2
    - 2.Sg6#
  - 1...Bc4
    - 2.Sxc4#
    - 2.Sg6#
  - 1...Be4
    - 2.Sc4#
  - 1...Bb5
    - 2.Sg6#
  - 1...Bf5
    - 2.Sc4#
  - 1...Ba6
    - 2.Sg6#
  - 1...Bg6
    - 2.Sc4#
    - 2.Sxg6#
  - 1...Bh7
    - 2.Sc4#
  - 1...Se1
    - 2.Bd4#
  - 1...Sg1
    - 2.Bd4#
  - 1...Sd2
    - 2.Bd4#
  - 1...Sh2
    - 2.Bd4#
  - 1...Sd4
    - 2.Bxd4#
  - 1...Sh4
    - 2.Bd4#
  - 1...Sg5
    - 2.Bd4#
  - 1...Se4
    - 2.Sg4#
    - 2.Sg6#
  - 1...Sg4
    - 2.Sxg4#
  - 1...Sd5
    - 2.Sg4#
  - 1...Sh5
    - 2.Sg4#
  - 1...Sd7
    - 2.Sg4#
  - 1...Sh7
    - 2.Sg4#
  - 1...Se8
    - 2.Sg4#
  - 1...Sg8
    - 2.Sg4#
  - 1...b5
    - 2.Sc6#
  - 1...b6
    - 2.Sc6#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
- B(a);N_GUARD::S(A)
- B(a);N_GUARD::S(E)
- S(b);N_GUARD::B(D)
- S(b);N_GUARD::B(D),XS(b)
- S(f);N_GUARD::S(A),XS(f)
- S(f);N_GUARD::S(A)
- P(d);OGATEB::B(D)
Tries
- Try
  - R(C);CHECK
  - Vars
    - B(a);SBLOCK,XR(C)::S(A)
    - S(f);SBLOCK,XR(C)::S(A)
  - Refutation
    - K(c);P-FLIGHT,XR(C)
Actual
- B(D);
- Vars
  - P(d);OGATEB::B(D)
  - B(a);N_GUARD::S(A)
  - B(a);N_GUARD::S(E)
  - S(b);N_GUARD::B(D)
  - S(b);N_GUARD::B(D),XS(b)
  - S(f);N_GUARD::S(A),XS(f)
  - S(f);N_GUARD::S(A)
  - P(g);N_GUARD::S(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).