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Problem Display

PID: 195854 (5b2/KR3Bq1/3p1P2/6R1/kN6/p7/p7/1n2B3 w - - 0 1)

Kovacevic, Marjan

1st Prize, Kozlov MT, 2017

5b2/KR3Bq1/3p1P2/6R1/kN6/p7/p7/1n2B3

#2

7 + 7

145	StrateGems	2018

SOLUTION

SOUND
Tries
- 1.Sxa2?
  - threat
    - 2.Bb3#
    - 2.Ra5#
    - 2.Rb4#
  - 1...Qxg5
    - 2.Bb3#
  - 1...Qxf7
    - 2.Ra5#
  - 1...Qg8
    - 2.Be8#
    - 2.Ra5#
    - 2.Rb4#
  - 1...Sd2
    - 2.Sc3#
    - 2.Rb4#
  - 1...Sc3
    - 2.Sxc3#
    - 2.Bb3#
    - 2.Rb4#
  - 1...d5!
- 1.Sc2?
  - threat
    - 2.Bb3#
    - 2.Ra5#
    - 2.Rb4#
  - 1...Qxg5
    - 2.Bb3#
  - 1...Qxf7
    - 2.Ra5#
  - 1...a1S
    - 2.Ra5#
    - 2.Rb4#
  - 1...Qg8
    - 2.Be8#
    - 2.Ra5#
    - 2.Rb4#
  - 1...Sd2
    - 2.Rb4#
  - 1...Sc3
    - 2.Bb3#
    - 2.Rb4#
  - 1...d5!
- 1.Sd3?
  - threat
    - 2.Bb3#
    - 2.Ra5#
    - 2.Rb4#
  - 1...Qxg5
    - 2.Bb3#
  - 1...Qxf7
    - 2.Ra5#
  - 1...a1S
    - 2.Ra5#
    - 2.Rb4#
  - 1...Qg8
    - 2.Be8#
    - 2.Ra5#
    - 2.Rb4#
  - 1...Sd2
    - 2.Rb4#
  - 1...Sc3
    - 2.Bb3#
    - 2.Rb4#
  - 1...d5!
- 1.Sa6?
  - threat
    - 2.Bb3#
    - 2.Ra5#
    - 2.Rb4#
  - 1...Qxg5
    - 2.Bb3#
  - 1...Qxf7
    - 2.Ra5#
  - 1...a1S
    - 2.Ra5#
    - 2.Rb4#
  - 1...Qg8
    - 2.Be8#
    - 2.Ra5#
    - 2.Rb4#
  - 1...Sd2
    - 2.Rb4#
  - 1...Sc3
    - 2.Bb3#
    - 2.Rb4#
  - 1...d5!
- 1.Sc6?
  - threat
    - 2.Bb3#
    - 2.Ra5#
    - 2.Rb4#
  - 1...Qxg5
    - 2.Bb3#
    - 2.Rb4#
  - 1...Qxf7
    - 2.Ra5#
  - 1...a1S
    - 2.Ra5#
    - 2.Rb4#
  - 1...Qg8
    - 2.Ra5#
    - 2.Rb4#
  - 1...Sd2
    - 2.Ra5#
    - 2.Rb4#
  - 1...d5!
Keys
- 1.Sd5!
  - threat
    - 2.Sb6#
  - 1...Qxg5
    - 2.Be8#
  - 1...Qxf7
    - 2.Rg4#
  - 1...Sd2
    - 2.Sc3#
  - 1...Sc3
    - 2.Sxc3#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
Sets
Tries
- Try
  - S(B);XP(b)
  - Threat
    - DUALS(3)
  - Vars
    - Q(f);XR(C)::B(G)
    - Q(f);P_PINR(F),XB(G)::R1(C)
  - Refutation
    - P(e);
- Try
  - S(B);
  - Threat
    - DUALS(3)
  - Vars
    - Q(f);XR(C)::B(G)
    - Q(f);P_PINR(F),XB(G)::R1(C)
    - S(a);::R1(F)
  - Refutation
    - P(e);
- Try
  - S(B);
  - Threat
    - DUALS(3)
  - Vars
    - Q(f);XR(C)::B(G)
    - Q(f);P_PINR(F),XB(G)::R1(C)
    - S(a);::R1(F)
  - Refutation
    - P(e);
- Try
  - S(B);
  - Threat
    - DUALS(3)
  - Vars
    - Q(f);XR(C)::B(G)
    - Q(f);P_PINR(F),XB(G)::R1(C)
    - S(a);::R1(F)
  - Refutation
    - P(e);
- Try
  - S(B);
  - Threat
    - DUALS(3)
  - Vars
    - Q(f);P_PINR(F),XB(G)::R1(C)
  - Refutation
    - P(e);
Actual
- S(B);
- Threat
  - S(B)
- Vars
  - Q(f);N_GUARD,XR(C)::B(G)
  - Q(f);N_GUARD,P_PINR(F),XB(G)::R(C)
  - S(a);N_GUARD::S(B)
  - S(a);N_GUARD::S(B),XS(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).