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Problem Display

PID: 205524 (8/8/1p6/1N6/2n5/2K5/k7/2Q5 w - - 0 1)

Pape, Edouard

L'Echiquier Marseillais, 1925

8/8/1p6/1N6/2n5/2K5/k7/2Q5

#2

3 + 3

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...Sb2
  - 2.Qxb2#
- 1...Sd2
  - 2.Qb2#
- 1...Sa3
  - 2.Qb2#
- 1...Se3
  - 2.Qb2#
- 1...Sa5
  - 2.Qb2#
- 1...Se5
  - 2.Qb2#
- 1...Sd6
  - 2.Qb2#
Tries
- 1.Kc2?
  - threat
    - 2.Sc3#
    - 2.Qb1#
  - 1...Sa3+
    - 2.Qxa3#
  - 1...Sb2
    - 2.Qxb2#
    - 2.Qb1#
  - 1...Sd2
    - 2.Sc3#
    - 2.Qb2#
    - 2.Qa3#
  - 1...Se3+!
- 1.Sa3?
  - 1...Sxa3
    - 2.Qb2#
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sd2
    - 2.Qb2#
  - 1...Se3
    - 2.Qb2#
  - 1...Sa5
    - 2.Qb2#
  - 1...Se5
    - 2.Qb2#
  - 1...Sd6
    - 2.Qb2#
  - 1...b5!
- 1.Sd4?
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sd2
    - 2.Qb2#
  - 1...Sa3
    - 2.Qb2#
  - 1...Se3
    - 2.Qb2#
  - 1...Sa5
    - 2.Qb2#
  - 1...Se5
    - 2.Qb2#
  - 1...Sd6
    - 2.Qb2#
  - 1...b5!
- 1.Sd6?
  - 1...Sxd6
    - 2.Qb2#
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sd2
    - 2.Qb2#
  - 1...Sa3
    - 2.Qb2#
  - 1...Se3
    - 2.Qb2#
  - 1...Sa5
    - 2.Qb2#
  - 1...Se5
    - 2.Qb2#
  - 1...b5!
- 1.Sa7?
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sd2
    - 2.Qb2#
  - 1...Sa3
    - 2.Qb2#
  - 1...Se3
    - 2.Qb2#
  - 1...Sa5
    - 2.Qb2#
  - 1...Se5
    - 2.Qb2#
  - 1...Sd6
    - 2.Qb2#
  - 1...b5!
- 1.Sc7?
  - 1...Sb2
    - 2.Qxb2#
  - 1...Sd2
    - 2.Qb2#
  - 1...Sa3
    - 2.Qb2#
  - 1...Se3
    - 2.Qb2#
  - 1...Sa5
    - 2.Qb2#
  - 1...Se5
    - 2.Qb2#
  - 1...Sd6
    - 2.Qb2#
  - 1...b5!
- 1.Qc2+?
  - 1...Sb2
    - 2.Qxb2#
  - 1...Ka1!
Keys
- 1.Kb4!
  - threat
    - 2.Sc3#

FEATURES

Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 7
Sets
- S(b);N_GUARD::QAR1(A),XS(b)
- S(b);N_GUARD::QAR1(A)
Tries
- Try
  - K(B);P-FLIGHT
  - Threat
    - DUALS(2)
  - Vars
    - S(b);CHECK,N_GUARD::QAR1(A),XS(b)
  - Refutation
    - S(b);CHECK
- Try
  - S(C);
  - Vars
    - S(b);N_GUARD,XS(C)::QAR1(A)
    - S(b);N_GUARD::QAR1(A),XS(b)
    - S(b);N_GUARD::QAR1(A)
  - Refutation
    - P(c);
- Try
  - S(C);
  - Vars
    - S(b);N_GUARD::QAR1(A),XS(b)
    - S(b);N_GUARD::QAR1(A)
  - Refutation
    - P(c);
- Try
  - S(C);
  - Vars
    - S(b);N_GUARD,XS(C)::QAR1(A)
    - S(b);N_GUARD::QAR1(A),XS(b)
    - S(b);N_GUARD::QAR1(A)
  - Refutation
    - P(c);
- Try
  - S(C);
  - Vars
    - S(b);N_GUARD::QAR1(A),XS(b)
    - S(b);N_GUARD::QAR1(A)
  - Refutation
    - P(c);
- Try
  - S(C);
  - Vars
    - S(b);N_GUARD::QAR1(A),XS(b)
    - S(b);N_GUARD::QAR1(A)
  - Refutation
    - P(c);
- Try
  - Q(A);CHECK
  - Vars
    - S(b);N_GUARD,P_SPINS(b)::QAR1(A),XS(b)
  - Refutation
    - K(a);P-FLIGHT
Actual
- K(B);S_FLIGHT
- Threat
  - S(C)

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).