Meson Chess Problem Database

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Problem Display

PID: 227828 (8/5pN1/2Q5/4k3/5p2/2P2K2/8/8 w - - 0 1)

Schonberger, Tibor

Uj Nemezdek, 1926

8/5pN1/2Q5/4k3/5p2/2P2K2/8/8

#2

4 + 3

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...f5
  - 2.Qe6#
- 1...f6
  - 2.Qc5#
  - 2.Qe6#
Tries
- 1.Ke2?
  - 1...f5
    - 2.Qe6#
  - 1...f6
    - 2.Qe6#
  - 1...f3+!
- 1.Kf2?
  - 1...f5
    - 2.Qe6#
  - 1...f6
    - 2.Qe6#
  - 1...f3!
- 1.Kg2?
  - 1...f5
    - 2.Qe6#
  - 1...f6
    - 2.Qe6#
  - 1...f3+!
- 1.Sf5?
  - 1...f6
    - 2.Qe4#
  - 1...Kxf5!
- 1.Qa6?
  - 1...f5
    - 2.Qe6#
  - 1...f6
    - 2.Qe6#
  - 1...Kd5!
Keys
- 1.Se8!
  - threat
    - 2.Qe4#
  - 1...Kf5
    - 2.Qf6#
  - 1...f5
    - 2.Qd6#

FEATURES

Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- P(c);N_GUARD::QAR1(C)
Tries
- Try
  - K(B);S_FLIGHT
  - Vars
    - P(c);N_GUARD::QAR1(C)
  - Refutation
    - P(a);CHECK
- Try
  - K(B);P-FLIGHT
  - Vars
    - P(c);N_GUARD::QAR1(C)
  - Refutation
    - P(a);
- Try
  - K(B);S_FLIGHT
  - Vars
    - P(c);N_GUARD::QAR1(C)
  - Refutation
    - P(a);CHECK
- Try
  - S(D);
  - Vars
    - P(c);SBLOCK::QAR1(C)
  - Refutation
    - K(b);P-FLIGHT,XS(D)
- Try
  - Q(C);
  - Vars
    - P(c);N_GUARD::QAR1(C)
  - Refutation
    - K(b);P-FLIGHT
Actual
- S(D);
- Threat
  - QAR1(C)
- Vars
  - K(b);P-FLIGHT::QAR1(C)
  - P(c);SBLOCK::QAB1(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).