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Problem Display

PID: 263174 (q2B3Q/2pNP2b/3k3r/2p1N3/p1P5/K4p2/8/8 w - - 0 1)

Lilu, Zhorzh Aleksandrovich

SuperProblem, 2021

q2B3Q/2pNP2b/3k3r/2p1N3/p1P5/K4p2/8/8

#2

7 + 8

6490	yacpdb	2022

SOLUTION

SOUND
Sets
- 1...Rh1
  - 2.Qf6#
- 1...Rh2
  - 2.Qf6#
- 1...Rh3
  - 2.Qf6#
- 1...Rh4
  - 2.Qf6#
- 1...Rh5
  - 2.Qf6#
- 1...Rf6
  - 2.Qxf6#
- 1...Bg6
  - 2.Qf6#
Tries
- 1.Sf8?
  - threat
    - 2.e8S#
  - 1...Qxd8
    - 2.exd8Q#
  - 1...Rf6
    - 2.Qxf6#
  - 1...Qc6
    - 2.Sf7#
  - 1...Bg6
    - 2.Qf6#
  - 1...Re6!
Keys
- 1.Qf8!
  - threat
    - 2.e8Q#
    - 2.e8R#
  - 1...Ke6
    - 2.e8Q#
    - 2.e8R#
  - 1...Qxd8
    - 2.exd8S#
  - 1...Qe4
    - 2.e8Q#
    - 2.e8R#
  - 1...Qd5
    - 2.e8Q#
    - 2.e8R#
  - 1...Qc6
    - 2.e8Q#
    - 2.e8R#
  - 1...Qb7
    - 2.e8Q#
    - 2.e8R#
  - 1...Qa5
    - 2.e8Q#
    - 2.e8R#
  - 1...Qa6
    - 2.e8Q#
    - 2.e8R#
  - 1...Qa7
    - 2.e8Q#
    - 2.e8R#
  - 1...Qb8
    - 2.e8Q#
    - 2.e8R#
  - 1...Qc8
    - 2.e8Q#
    - 2.e8R#
  - 1...Rh1
    - 2.Qf6#
    - 2.e8Q#
    - 2.e8R#
  - 1...Rh2
    - 2.Qf6#
    - 2.e8Q#
    - 2.e8R#
  - 1...Rh3
    - 2.Qf6#
    - 2.e8Q#
    - 2.e8R#
  - 1...Rh4
    - 2.Qf6#
    - 2.e8Q#
    - 2.e8R#
  - 1...Rh5
    - 2.Qf6#
    - 2.e8Q#
    - 2.e8R#
  - 1...Rf6
    - 2.Qxf6#
  - 1...Rg6
    - 2.e8Q#
    - 2.e8R#
  - 1...Bb1
    - 2.e8Q#
    - 2.e8R#
  - 1...Bc2
    - 2.e8Q#
    - 2.e8R#
  - 1...Bd3
    - 2.e8Q#
    - 2.e8R#
  - 1...Be4
    - 2.e8Q#
    - 2.e8R#
  - 1...Bf5
    - 2.e8Q#
    - 2.e8R#
  - 1...Bg6
    - 2.Qf6#
    - 2.e8Q#
    - 2.e8R#
  - 1...Bg8
    - 2.e8Q#
    - 2.e8R#
  - 1...f2
    - 2.e8Q#
    - 2.e8R#
  - 1...c6
    - 2.e8Q#
    - 2.e8R#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 6
Sets
- R(e);N_GUARD::QAR2(G)
- R(e);N_GUARD::QAR2(G),XR(e)
- B(g);S_CUTR(e)::QAR2(G)
Tries
- Try
  - S(D);
  - Threat
    - P=S
  - Vars
    - Q(h);OGATE,XB(F)::PXQ(h)=Q
    - R(e);N_GUARD::QAR2(G),XR(e)
    - Q(h);SBLOCK::S(C)
    - B(g);S_CUTR(e)::QAR2(G)
  - Refutation
    - R(e);
Actual
- Q(G);
- Threat
  - P=Q
- Vars
  - K(d);P-FLIGHT::P=Q
  - Q(h);OGATE,XB(F)::PXQ(h)=S
  - Q(h);::P=Q
  - R(e);N_GUARD::QAR2(G),XR(e)
  - R(e);::P=Q
  - B(g);::P=Q
  - P(a);::P=Q
  - P(f);::P=Q

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).