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Problem Display

PID: 214269 (8/6Rn/7k/8/6Qn/8/8/7K w - - 0 1)

Shmatov, Vladimir Afanasievich

Suomen Shakki, 1997

8/6Rn/7k/8/6Qn/8/8/7K

#2

3 + 3

15148	Sadier Collection	2020

SOLUTION

SOUND
Sets
- 1...Sg2
  - 2.Rg6#
  - 2.Qg6#
- 1...Sf3
  - 2.Rg6#
  - 2.Qg6#
- 1...Sf5
  - 2.Rg6#
  - 2.Qg6#
- 1...Sg6
  - 2.Rxg6#
  - 2.Qxg6#
- 1...Sg5
  - 2.Qxg5#
- 1...Sf6
  - 2.Qg5#
- 1...Sf8
  - 2.Qg5#
Tries
- 1.Kg1?
  - 1...Sg6
    - 2.Rxg6#
    - 2.Qxg6#
  - 1...Sg5
    - 2.Qxg5#
  - 1...Sg2
    - 2.Rg6#
    - 2.Qg6#
  - 1...Sf5
    - 2.Rg6#
    - 2.Qg6#
  - 1...Sf6
    - 2.Qg5#
  - 1...Sf8
    - 2.Qg5#
  - 1...Sf3+!
- 1.Kh2?
  - 1...Sg6
    - 2.Rxg6#
    - 2.Qxg6#
  - 1...Sg5
    - 2.Qxg5#
  - 1...Sg2
    - 2.Rg6#
    - 2.Qg6#
  - 1...Sf5
    - 2.Rg6#
    - 2.Qg6#
  - 1...Sf6
    - 2.Qg5#
  - 1...Sf8
    - 2.Qg5#
  - 1...Sf3+!
- 1.Rg8?
  - threat
    - 2.Qxh4#
  - 1...Sg2
    - 2.Rg6#
    - 2.Qg6#
  - 1...Sf3
    - 2.Rg6#
    - 2.Qg6#
  - 1...Sf5
    - 2.Rg6#
    - 2.Qg6#
  - 1...Sg6
    - 2.Rxg6#
    - 2.Qxg6#
  - 1...Sf6!
- 1.Qg1?
  - 1...Kh5
    - 2.Rxh7#
  - 1...Sg6
    - 2.Qxg6#
  - 1...Sg5
    - 2.Qxg5#
  - 1...Sf3
    - 2.Qg6#
  - 1...Sf5
    - 2.Qg6#
  - 1...Sf6
    - 2.Qg5#
  - 1...Sf8
    - 2.Qg5#
  - 1...Sg2!
- 1.Qg2?
  - 1...Kh5
    - 2.Rxh7#
  - 1...Sg6
    - 2.Qxg6#
  - 1...Sg5
    - 2.Qxg5#
  - 1...Sf3
    - 2.Qg6#
  - 1...Sf5
    - 2.Qg6#
  - 1...Sf6
    - 2.Qg5#
  - 1...Sf8
    - 2.Qg5#
  - 1...Sxg2!
Keys
- 1.Qg3!
  - 1...Kh5
    - 2.Rxh7#
  - 1...Sg6
    - 2.Qxg6#
  - 1...Sg5
    - 2.Qxg5#
  - 1...Sg2
    - 2.Qg6#
  - 1...Sf3
    - 2.Qg6#
  - 1...Sf5
    - 2.Qg6#
  - 1...Sf6
    - 2.Qg5#
  - 1...Sf8
    - 2.Qg5#

FEATURES

Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
Sets
- S(c);N_GUARD::QAB1(B),XS(c)
- S(c);N_GUARD::QAB1(B)
Tries
- Try
  - K(A);P-FLIGHT
  - Vars
    - S(c);N_GUARD::QAB1(B),XS(c)
    - S(c);N_GUARD::QAB1(B)
  - Refutation
    - S(a);CHECK
- Try
  - K(A);P-FLIGHT
  - Vars
    - S(c);N_GUARD::QAB1(B),XS(c)
    - S(c);N_GUARD::QAB1(B)
  - Refutation
    - S(a);CHECK
- Try
  - R(C);
  - Threat
    - QAR2(B),XS(a)
  - Refutation
    - S(c);
- Try
  - Q(B);
  - Vars
    - K(b);P-FLIGHT::R(C),XS(c)
    - S(a);N_GUARD::QAR1(B),XS(a)
    - S(c);N_GUARD::QAB1(B),XS(c)
    - S(a);N_GUARD::QAR1(B)
    - S(c);N_GUARD::QAB1(B)
  - Refutation
    - S(a);
- Try
  - Q(B);
  - Vars
    - K(b);P-FLIGHT::R(C),XS(c)
    - S(a);N_GUARD::QAR1(B),XS(a)
    - S(c);N_GUARD::QAB1(B),XS(c)
    - S(a);N_GUARD::QAR1(B)
    - S(c);N_GUARD::QAB1(B)
  - Refutation
    - S(a);XQ(B)
Actual
- Q(B);
- Vars
  - K(b);P-FLIGHT::R(C),XS(c)
  - S(a);N_GUARD::QAR1(B),XS(a)
  - S(c);N_GUARD::QAB1(B),XS(c)
  - S(a);N_GUARD::QAR1(B)
  - S(c);N_GUARD::QAB1(B)

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).