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Problem Display

PID: 157930 (8/3K4/8/3kp3/3n4/3P4/5B2/5Q2 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

8/3K4/8/3kp3/3n4/3P4/5B2/5Q2

#2

4 + 3

15148	Sadier Collection	2016

SOLUTION

SOUND
Tries
- 1.Qe1?
  - 1...Kc5
    - 2.Qa5#
  - 1...Sc2
    - 2.Qa5#
    - 2.Qe4#
  - 1...Se2
    - 2.Qa5#
  - 1...Sb3
    - 2.Qe4#
  - 1...Sf3
    - 2.Qa5#
    - 2.Qe4#
  - 1...Sb5
    - 2.Qe4#
  - 1...Sf5
    - 2.Qa5#
    - 2.Qe4#
  - 1...Sc6
    - 2.Qe4#
  - 1...Se6
    - 2.Qe4#
  - 1...e4!
Keys
- 1.Qa1!
  - 1...Kc5
    - 2.Qa5#
  - 1...e4
    - 2.Qxd4#
  - 1...Sc2
    - 2.Qa2#
    - 2.Qa5#
    - 2.Qa8#
  - 1...Se2
    - 2.Qa2#
    - 2.Qa5#
    - 2.Qa8#
  - 1...Sb3
    - 2.Qa8#
  - 1...Sf3
    - 2.Qa2#
    - 2.Qa5#
    - 2.Qa8#
  - 1...Sb5
    - 2.Qa2#
    - 2.Qa8#
  - 1...Sf5
    - 2.Qa2#
    - 2.Qa5#
    - 2.Qa8#
  - 1...Sc6
    - 2.Qa2#
  - 1...Se6
    - 2.Qa2#
    - 2.Qa8#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
Sets
Tries
- Try
  - Q(A);
  - Vars
    - K(b);P-FLIGHT,P_SPINS(a)::QAR2(A)
    - S(a);N_GUARD::QAR(A)
    - S(a);::QAB1(A)
  - Refutation
    - P(c);
Actual
- Q(A);
- Vars
  - K(b);P-FLIGHT,P_SPINS(a)::QAR2(A)
  - P(c);N_GUARD::QAR1(A),XS(a)
  - S(a);N_GUARD::QAB(A)

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).