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Problem Display

PID: 187897 (K7/8/2n3p1/5RPk/4N1nr/b5Qb/8/8 w - - 0 1)

Smutny, Jan

Deutsche Schachbund, 1910

K7/8/2n3p1/5RPk/4N1nr/b5Qb/8/8

#2

5 + 7

6490	yacpdb	2019

SOLUTION

SOUND
Sets
- 1...Sf2
  - 2.Sf6#
- 1...Sh2
  - 2.Sf6#
- 1...Se3
  - 2.Sf6#
- 1...Sge5
  - 2.Sf6#
- 1...Sf6
  - 2.Sxf6#
- 1...Sh6
  - 2.Sf6#
Tries
- 1.Qc7?
  - threat
    - 2.Sg3#
  - 1...gxf5
    - 2.Qf7#
  - 1...Sf2
    - 2.Sf6#
  - 1...Sh2
    - 2.Sf6#
  - 1...Se3
    - 2.Sf6#
  - 1...Sge5
    - 2.Sf6#
  - 1...Sf6
    - 2.Sxf6#
  - 1...Sh6
    - 2.Sf6#
  - 1...Bd6!
- 1.Qb8?
  - threat
    - 2.Sg3#
  - 1...gxf5
    - 2.Qe8#
  - 1...Sf2
    - 2.Sf6#
  - 1...Sh2
    - 2.Sf6#
  - 1...Se3
    - 2.Sf6#
  - 1...Sge5
    - 2.Sf6#
  - 1...Sf6
    - 2.Sxf6#
  - 1...Sh6
    - 2.Sf6#
  - 1...Bd6!
- 1.Qxa3?
  - threat
    - 2.Sg3#
  - 1...Sf2
    - 2.Sf6#
  - 1...Sh2
    - 2.Sf6#
  - 1...Se3
    - 2.Sf6#
  - 1...Sge5
    - 2.Sf6#
  - 1...Sf6
    - 2.Sxf6#
  - 1...Sh6
    - 2.Sf6#
  - 1...gxf5!
- 1.Qb3?
  - threat
    - 2.Sg3#
  - 1...gxf5
    - 2.Qf7#
  - 1...Sf2
    - 2.Sf6#
  - 1...Sh2
    - 2.Sf6#
  - 1...Se3
    - 2.Sf6#
  - 1...Sge5
    - 2.Sf6#
  - 1...Sf6
    - 2.Sxf6#
  - 1...Sh6
    - 2.Sf6#
  - 1...Bd6!
- 1.Qf3?
  - threat
    - 2.Sg3#
    - 2.Sf6#
  - 1...Bb2
    - 2.Sg3#
  - 1...Bd6
    - 2.Sf6#
  - 1...Be7
    - 2.Sg3#
  - 1...gxf5!
Keys
- 1.Qe5!
  - threat
    - 2.Sg3#
  - 1...Sgxe5
    - 2.Sf6#
  - 1...gxf5
    - 2.Qe8#
  - 1...Sf2
    - 2.Sf6#
  - 1...Sh2
    - 2.Sf6#
  - 1...Se3
    - 2.Sf6#
  - 1...Sf6
    - 2.Sxf6#
  - 1...Sh6
    - 2.Sf6#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- S(c);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
Tries
- Try
  - Q(A);
  - Threat
    - S(B)
  - Vars
    - P(g);OGATEB,XR(C)::QAB(A)
    - S(c);N_GUARD::S(B)
    - S(c);N_GUARD::S(B),XS(c)
  - Refutation
    - B(a);
- Try
  - Q(A);
  - Threat
    - S(B)
  - Vars
    - P(g);OGATEB,XR(C)::QAB(A)
    - S(c);N_GUARD::S(B)
    - S(c);N_GUARD::S(B),XS(c)
  - Refutation
    - B(a);
- Try
  - Q(A);XB(a)
  - Threat
    - S(B)
  - Vars
    - S(c);N_GUARD::S(B)
    - S(c);N_GUARD::S(B),XS(c)
  - Refutation
    - P(g);XR(C)
- Try
  - Q(A);
  - Threat
    - S(B)
  - Vars
    - P(g);OGATEB,XR(C)::QAB(A)
    - S(c);N_GUARD::S(B)
    - S(c);N_GUARD::S(B),XS(c)
  - Refutation
    - B(a);
- Try
  - Q(A);P_PINS(c)
  - Threat
    - DUALS(2)
  - Vars
    - B(a);::S(B)
  - Refutation
    - P(g);XR(C)
Actual
- Q(A);
- Threat
  - S(B)
- Vars
  - S(c);N_GUARD,XQ(A)::S(B)
  - P(g);OGATEB,XR(C)::QAB(A)
  - S(c);N_GUARD::S(B)
  - S(c);N_GUARD::S(B),XS(c)

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).