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Problem Display

PID: 169087 (2r3n1/N6Q/1pP1B3/nbk1P3/pp6/3pP3/1NrP1p2/2b2K2 w - - 0 1)

Permyakov, Evgeni Nikolaevich

1st Place, SuperProblem 033. TT, 2012

2r3n1/N6Q/1pP1B3/nbk1P3/pp6/3pP3/1NrP1p2/2b2K2

#2

9 + 12

6490	yacpdb	2018

SOLUTION

SOUND
Sets
- 1...Rc4
  - 2.Sxd3#
- 1...Bc4
  - 2.Sxa4#
- 1...Ba6
  - 2.Sxa4#
- 1...Bxc6
  - 2.Sxd3#
- 1...Sc4
  - 2.Sxd3#
- 1...Sf6
  - 2.Qe7#
- 1...Sh6
  - 2.Qe7#
- 1...Se7
  - 2.Qxe7#
Tries
- 1.Qe4?
  - threat
    - 2.Qd5#
    - 2.Qd4#
  - 1...Bxb2
    - 2.Qd5#
  - 1...Bxc6
    - 2.Sxd3#
    - 2.Qd4#
  - 1...Sxc6
    - 2.Qd5#
  - 1...Rc4
    - 2.Sxd3#
    - 2.Qd5#
  - 1...Bc4
    - 2.Sxa4#
    - 2.Qd4#
  - 1...Sb3
    - 2.Qd5#
  - 1...Sf6
    - 2.Qd4#
  - 1...Se7
    - 2.Qd4#
  - 1...b3
    - 2.Qd4#
  - 1...Rd8!
- 1.Qd7?
  - threat
    - 2.Qd4#
    - 2.Qd5#
    - 2.Qd6#
  - 1...Rxc6
    - 2.Qd4#
    - 2.Qd5#
  - 1...Bxb2
    - 2.Qd5#
    - 2.Qd6#
  - 1...Bxc6
    - 2.Sxd3#
    - 2.Qd4#
    - 2.Qd6#
  - 1...Sxc6
    - 2.Qd5#
    - 2.Qd6#
  - 1...b3
    - 2.Qd4#
    - 2.Qd6#
  - 1...Rc4
    - 2.Sxd3#
    - 2.Qd5#
    - 2.Qd6#
  - 1...Bc4
    - 2.Sxa4#
    - 2.Qd4#
    - 2.Qd6#
  - 1...Sb3
    - 2.Qd5#
    - 2.Qd6#
  - 1...Sc4
    - 2.Sxd3#
    - 2.Qd4#
    - 2.Qd5#
  - 1...Sb7
    - 2.Qd4#
    - 2.Qd5#
  - 1...Sf6
    - 2.Qd4#
    - 2.Qd6#
    - 2.Qe7#
  - 1...Se7
    - 2.Qd4#
    - 2.Qd6#
    - 2.Qxe7#
  - 1...Rd8!
Keys
- 1.Qxd3!
  - threat
    - 2.Qxb5#
  - 1...Bxd3+
    - 2.Sxd3#
  - 1...Bxc6
    - 2.Qd4#
    - 2.Qd6#
  - 1...Rc4
    - 2.Qd5#
    - 2.Qd6#
  - 1...Bc4
    - 2.Sxa4#
  - 1...Ba6
    - 2.Sxa4#
  - 1...Sc4
    - 2.Qd4#
    - 2.Qd5#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 6
Sets
- R(b);S_CUTB(h)::S(B),XP(d)
- B(h);N_GUARD::S(B),XP(e)
- B(h);N_GUARD,XP(F)::S(B),XP(d)
- S(g);S_CUTB(h)::S(B),XP(d)
- S(l);N_GUARD::QAB(I)
- S(l);N_GUARD::QAB(I),XS(l)
Tries
- Try
  - Q(I);
  - Threat
    - DUALS(2)
  - Vars
    - B(a);XS(B)::QAR1(I)
    - S(g);XP(F)::QAR1(I)
    - S(g);::QAR1(I)
    - S(l);::QAB1(I)
    - P(f);::QAB1(I)
  - Refutation
    - R(k);
- Try
  - Q(I);
  - Threat
    - DUALS(3)
  - Refutation
    - R(k);
Actual
- Q(I);P_SPINQ(I),XP(d)
- Threat
  - QAR1(I),XB(h)
- Vars
  - B(h);CHECK,XQ(I)::S(B),XB(h)
  - B(h);N_GUARD::S(B),XP(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).