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Problem Display

PID: 273796 (8/8/8/8/7Q/3p4/1K1pp3/3k2NN w - - 0 1)

Jovanovic, D

Mat, 1972

8/8/8/8/7Q/3p4/1K1pp3/3k2NN

#2

4 + 4

SOLUTION

SOUND
Sets
- 1...e1Q
  - 2.Qa4#
- 1...e1S
  - 2.Sf2#
- 1...e1B
  - 2.Qa4#
  - 2.Qg4#
  - 2.Qh5#
- 1...e1R
  - 2.Sf2#
  - 2.Qa4#
Tries
- 1.Qg3?
  - 1...e1S
    - 2.Sf2#
  - 1...e1B
    - 2.Qf3#
    - 2.Qg4#
  - 1...e1R
    - 2.Sf2#
  - 1...e1Q!
- 1.Qb4?
  - 1...e1Q
    - 2.Qb3#
    - 2.Qa4#
  - 1...e1S
    - 2.Sf2#
  - 1...e1B
    - 2.Qb3#
    - 2.Qa4#
    - 2.Qg4#
  - 1...e1R
    - 2.Sf2#
    - 2.Qb3#
    - 2.Qa4#
  - 1...Ke1!
- 1.Qc4?
  - 1...e1Q
    - 2.Qb3#
    - 2.Qa4#
  - 1...e1S
    - 2.Sf2#
  - 1...e1B
    - 2.Qb3#
    - 2.Qa4#
    - 2.Qg4#
  - 1...e1R
    - 2.Sf2#
    - 2.Qb3#
    - 2.Qa4#
  - 1...Ke1!
- 1.Qd4?
  - 1...e1Q
    - 2.Qa4#
  - 1...e1S
    - 2.Sf2#
  - 1...e1B
    - 2.Qa4#
    - 2.Qg4#
  - 1...e1R
    - 2.Sf2#
    - 2.Qa4#
  - 1...Ke1!
- 1.Qe4?
  - 1...e1Q
    - 2.Qa4#
  - 1...e1S
    - 2.Sf2#
  - 1...e1B
    - 2.Qf3#
    - 2.Qa4#
    - 2.Qg4#
  - 1...e1R
    - 2.Sf2#
    - 2.Qa4#
  - 1...Ke1!
- 1.Qf4?
  - 1...e1Q
    - 2.Qa4#
  - 1...e1S
    - 2.Sf2#
  - 1...e1B
    - 2.Qf3#
    - 2.Qa4#
    - 2.Qg4#
  - 1...e1R
    - 2.Sf2#
    - 2.Qa4#
  - 1...Ke1!
Keys
- 1.Kb1!
  - 1...e1Q
    - 2.Qa4#
  - 1...e1S
    - 2.Sf2#
  - 1...e1B
    - 2.Qa4#
    - 2.Qg4#
    - 2.Qh5#
  - 1...e1R
    - 2.Sf2#
    - 2.Qa4#

FEATURES

Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- P(c);SBLOCK::QAB(D)
- P(c);SBLOCK::S(B)
Tries
- Try
  - Q(D);
  - Vars
    - P(c);SBLOCK::S(B)
  - Refutation
    - P(c);
- Try
  - Q(D);
  - Vars
    - P(c);SBLOCK::S(B)
  - Refutation
    - K(a);P-FLIGHT,P_SPINP(b)
- Try
  - Q(D);
  - Vars
    - P(c);SBLOCK::S(B)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - Q(D);
  - Vars
    - P(c);SBLOCK::QAB(D)
    - P(c);SBLOCK::S(B)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - Q(D);
  - Vars
    - P(c);SBLOCK::QAB(D)
    - P(c);::S(B)
  - Refutation
    - K(a);P-FLIGHT,P_SPINP(c)
- Try
  - Q(D);
  - Vars
    - P(c);SBLOCK::QAB(D)
    - P(c);SBLOCK::S(B)
  - Refutation
    - K(a);P-FLIGHT
Actual
- K(C);P-FLIGHT
- Vars
  - P(c);SBLOCK::QAB(D)
  - P(c);SBLOCK::S(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).