Meson Chess Problem Database

Home
Latest Additions
- #2
- #3
- #4
- #5
- Stats
Books
- All composers (SLOW)
- By initial letter
Magazines
- PID
- General
- Matrix
- All sources/quoters (SLOW)
- By initial letter
- Awards
- Composers
- Decades
- Quoters
- Sizes
- Soundness
- Sources
- Stipulations
- Years
Contact
Back to BDS Website

Problem Display

PID: 232136 (8/2pp4/5Q2/3k1K2/N7/N1B5/8/8 w - - 0 1)

Shanin, A

Schweizerische Schachzeitung, 1987

8/2pp4/5Q2/3k1K2/N7/N1B5/8/8

#2

5 + 3

SOLUTION

SOUND
Sets
- 1...c5
  - 2.Sb6#
- 1...c6
  - 2.Qd4#
  - 2.Qe5#
Tries
- 1.Kf4?
  - 1...c5
    - 2.Sb6#
  - 1...c6
    - 2.Qe5#
  - 1...d6!
- 1.Ba1?
  - 1...c5
    - 2.Sc3#
    - 2.Sb6#
  - 1...c6
    - 2.Qd4#
    - 2.Qe5#
  - 1...d6!
- 1.Be1?
  - 1...c5
    - 2.Sc3#
    - 2.Sb6#
  - 1...c6
    - 2.Qe5#
  - 1...d6!
- 1.Bb2?
  - 1...c5
    - 2.Sc3#
    - 2.Sb6#
  - 1...c6
    - 2.Qd4#
    - 2.Qe5#
  - 1...d6!
- 1.Bd2?
  - 1...c5
    - 2.Sc3#
    - 2.Sb6#
  - 1...c6
    - 2.Qe5#
  - 1...d6!
- 1.Ba5?
  - 1...c5
    - 2.Sc3#
    - 2.Sb6#
  - 1...c6
    - 2.Qe5#
  - 1...d6!
- 1.Be5?
  - 1...c5
    - 2.Sc3#
    - 2.Sb6#
    - 2.Qd6#
  - 1...c6
    - 2.Qd6#
    - 2.Qf7#
  - 1...d6!
- 1.Qe7?
  - threat
    - 2.Qc5#
    - 2.Qxd7#
  - 1...c5
    - 2.Qxc5#
    - 2.Qxd7#
  - 1...d6
    - 2.Qe4#
  - 1...Kc6!
- 1.Qa6?
  - 1...c6
    - 2.Qd3#
  - 1...d6
    - 2.Qc4#
  - 1...c5!
- 1.Qg6?
  - 1...d6
    - 2.Qg2#
  - 1...c5
    - 2.Sb6#
  - 1...c6!
Keys
- 1.Qh6!
  - 1...d6
    - 2.Qh1#
  - 1...c5
    - 2.Sb6#
  - 1...c6
    - 2.Qd2#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
- P(b);N_GUARD,SBLOCK::S(C)
Tries
- Try
  - K(D);P-FLIGHT
  - Vars
    - P(b);N_GUARD,SBLOCK::S(C)
    - P(b);SBLOCK::QAR1(E)
  - Refutation
    - P(c);
- Try
  - B(B);
  - Refutation
    - P(c);
- Try
  - B(B);
  - Vars
    - P(b);SBLOCK::QAR1(E)
  - Refutation
    - P(c);
- Try
  - B(B);
  - Refutation
    - P(c);
- Try
  - B(B);
  - Vars
    - P(b);SBLOCK::QAR1(E)
  - Refutation
    - P(c);
- Try
  - B(B);
  - Vars
    - P(b);SBLOCK::QAR1(E)
  - Refutation
    - P(c);
- Try
  - B(B);
  - Refutation
    - P(c);
- Try
  - Q(E);
  - Threat
    - DUALS(2)
  - Vars
    - P(c);SBLOCK::QAB1(E)
  - Refutation
    - K(a);S_FLIGHT
- Try
  - Q(E);
  - Vars
    - P(b);SBLOCK::QAR2(E)
    - P(c);SBLOCK::QAB1(E)
  - Refutation
    - P(b);
- Try
  - Q(E);
  - Vars
    - P(c);SBLOCK::QAB(E)
    - P(b);N_GUARD,SBLOCK::S(C)
  - Refutation
    - P(b);
Actual
- Q(E);
- Vars
  - P(c);SBLOCK::QAB(E)
  - P(b);N_GUARD,SBLOCK::S(C)
  - P(b);SBLOCK::QAR(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).