Meson Chess Problem Database

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Problem Display

PID: 189599 (Nq6/8/1n5Q/nP1kp3/2p1N3/4PB2/8/7K w - - 0 1)

von Gottschall, Hermann

Magyar Sakkvilag, 1911

Nq6/8/1n5Q/nP1kp3/2p1N3/4PB2/8/7K

#2

7 + 6

6490	yacpdb	2019

SOLUTION

SOUND
Sets
- 1...Qd6
  - 2.Qxd6#
- 1...Qa7
  - 2.Qd6#
- 1...Qc7
  - 2.Sxc7#
- 1...Qb7
  - 2.Qd6#
- 1...Qxa8
  - 2.Qd6#
- 1...Qc8
  - 2.Sxb6#
  - 2.Qd6#
- 1...Qe8
  - 2.Sxb6#
  - 2.Sc7#
  - 2.Qd6#
- 1...Qf8
  - 2.Sxb6#
  - 2.Sc7#
- 1...Qg8
  - 2.Sxb6#
  - 2.Sc7#
  - 2.Qd6#
- 1...Qh8
  - 2.Sxb6#
  - 2.Sc7#
- 1...Sb3
  - 2.Qc6#
- 1...Sc6
  - 2.Qxc6#
- 1...Sb7
  - 2.Sxb6#
  - 2.Qc6#
Tries
- 1.Qf6?
  - threat
    - 2.Qf7#
  - 1...Qd6
    - 2.Qxd6#
  - 1...Qa7
    - 2.Qd6#
  - 1...Qc7
    - 2.Sxc7#
  - 1...Qb7
    - 2.Qd6#
  - 1...Qc8
    - 2.Sxb6#
    - 2.Qd6#
  - 1...Qe8
    - 2.Sxb6#
    - 2.Sc7#
    - 2.Qd6#
  - 1...Qf8
    - 2.Sxb6#
    - 2.Sc7#
  - 1...Qg8
    - 2.Sxb6#
    - 2.Sc7#
    - 2.Qd6#
  - 1...Qh8+!
- 1.Qg6?
  - threat
    - 2.Qf7#
  - 1...Qd6
    - 2.Qxd6#
  - 1...Qa7
    - 2.Qd6#
  - 1...Qc7
    - 2.Sxc7#
  - 1...Qb7
    - 2.Qd6#
  - 1...Qc8
    - 2.Sxb6#
    - 2.Qd6#
  - 1...Qe8
    - 2.Sxb6#
    - 2.Sc7#
    - 2.Qd6#
  - 1...Qf8
    - 2.Sxb6#
    - 2.Sc7#
  - 1...Qg8
    - 2.Sxb6#
    - 2.Sc7#
    - 2.Qd6#
    - 2.Qxg8#
  - 1...Qh8+!
Keys
- 1.Qf8!
  - threat
    - 2.Qf7#
  - 1...Ke6
    - 2.Sc5#
  - 1...Qxf8
    - 2.Sc7#
  - 1...Qd6
    - 2.Qxd6#
  - 1...Qa7
    - 2.Qd6#
  - 1...Qc7
    - 2.Sxc7#
  - 1...Qb7
    - 2.Qd6#
  - 1...Qc8
    - 2.Qd6#
  - 1...Qe8
    - 2.Sc7#
    - 2.Qd6#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
Sets
- Q(f);N_GUARD::QAR1(F),XQ(f)
- Q(f);N_GUARD::QAR1(F)
- Q(f);N_GUARD::S(G),XQ(f)
- Q(f);N_GUARD,XS(G)::QAR1(F)
- S(b);N_GUARD::QAB1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
Tries
- Try
  - Q(F);
  - Threat
    - QAB(F)
  - Vars
    - Q(f);N_GUARD::QAR1(F),XQ(f)
    - Q(f);N_GUARD::QAR1(F)
    - Q(f);N_GUARD::S(G),XQ(f)
  - Refutation
    - Q(f);CHECK
- Try
  - Q(F);
  - Threat
    - QAB(F)
  - Vars
    - Q(f);N_GUARD::QAR1(F),XQ(f)
    - Q(f);N_GUARD::QAR1(F)
    - Q(f);N_GUARD::S(G),XQ(f)
  - Refutation
    - Q(f);CHECK
Actual
- Q(F);
- Threat
  - QAB(F)
- Vars
  - K(c);S_FLIGHT::S(D)
  - Q(f);N_GUARD,XQ(F)::S(G)
  - Q(f);N_GUARD::QAR1(F),XQ(f)
  - Q(f);N_GUARD::QAR1(F)
  - Q(f);N_GUARD::S(G),XQ(f)

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).