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Problem Display

PID: 170857 (8/8/8/6Q1/6N1/4N2k/4K2P/4b3 w - - 0 1)

Lincoln, Robert A

StrateGems, 2017

8/8/8/6Q1/6N1/4N2k/4K2P/4b3

#2

5 + 2

SOLUTION

SOUND
Sets
- 1...Bd2
  - 2.Qh6#
  - 2.Qh5#
- 1...Bc3
  - 2.Qh6#
  - 2.Qh5#
- 1...Bb4
  - 2.Qh6#
  - 2.Qh5#
- 1...Ba5
  - 2.Qh6#
  - 2.Qh5#
Tries
- 1.Sf2+?
  - 1...Kxh2
    - 2.Sf1#
    - 2.Qg2#
  - 1...Bxf2!
- 1.Se5?
  - 1...Kxh2
    - 2.Qg2#
  - 1...Bd2
    - 2.Qh6#
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bc3
    - 2.Qh6#
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bg3
    - 2.Qxg3#
  - 1...Bb4
    - 2.Qh6#
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bh4
    - 2.Qg2#
  - 1...Ba5
    - 2.Qh6#
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bf2!
- 1.Sf6?
  - 1...Kxh2
    - 2.Qg2#
  - 1...Bd2
    - 2.Qh6#
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bc3
    - 2.Qh6#
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bg3
    - 2.Qxg3#
  - 1...Bb4
    - 2.Qh6#
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bh4
    - 2.Qg2#
  - 1...Ba5
    - 2.Qh6#
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bf2!
- 1.Sh6?
  - 1...Kxh2
    - 2.Qg2#
  - 1...Bd2
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bc3
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bg3
    - 2.Qxg3#
  - 1...Bb4
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bh4
    - 2.Qg2#
  - 1...Ba5
    - 2.Qg3#
    - 2.Qh5#
  - 1...Bf2!
Keys
- 1.Qf4!
  - 1...Kh4
    - 2.Qh6#
  - 1...Bf2
    - 2.Sxf2#
  - 1...Bd2
    - 2.Sf2#
    - 2.Qg3#
    - 2.Qh6#
  - 1...Bc3
    - 2.Sf2#
    - 2.Qg3#
    - 2.Qh6#
  - 1...Bg3
    - 2.Qxg3#
  - 1...Bb4
    - 2.Sf2#
    - 2.Qg3#
    - 2.Qh6#
  - 1...Bh4
    - 2.Qf1#
  - 1...Ba5
    - 2.Sf2#
    - 2.Qg3#
    - 2.Qh6#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
Sets
Tries
- Try
  - S(D);CHECK
  - Refutation
    - B(a);XS(D)
- Try
  - S(D);
  - Vars
    - K(b);P-FLIGHT,XP(B)::QAR1(E)
    - B(a);N_GUARD::QAR1(E),XB(a)
    - B(a);SBLOCK::QAB1(E)
  - Refutation
    - B(a);
- Try
  - S(D);
  - Vars
    - K(b);P-FLIGHT,XP(B)::QAR1(E)
    - B(a);N_GUARD::QAR1(E),XB(a)
    - B(a);SBLOCK::QAB1(E)
  - Refutation
    - B(a);
- Try
  - S(D);
  - Vars
    - K(b);P-FLIGHT,XP(B)::QAR1(E)
    - B(a);N_GUARD::QAR1(E),XB(a)
    - B(a);SBLOCK::QAB1(E)
  - Refutation
    - B(a);
Actual
- Q(E);
- Vars
  - K(b);P-FLIGHT::QAR2(E)
  - B(a);N_GUARD::S(D),XB(a)
  - B(a);N_GUARD::QAR1(E),XB(a)
  - B(a);SBLOCK::QAB(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).