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Problem Display

PID: 244843 (8/4Q3/5p2/5p2/P1Nr1n2/p2k1P2/3P4/3K4 w - - 0 1)

Gold, Samuel

Wiener Hausfrauen-Zeitung, 1890

8/4Q3/5p2/5p2/P1Nr1n2/p2k1P2/3P4/3K4

#2

6 + 6

15148	Sadier Collection	2021

SOLUTION

SOUND
Sets
- 1...Rxc4
  - 2.Qe3#
- 1...Se2
  - 2.Qxe2#
- 1...Sg2
  - 2.Qe2#
- 1...Sh3
  - 2.Qe2#
- 1...Sd5
  - 2.Qe2#
- 1...Sh5
  - 2.Qe2#
- 1...Sg6
  - 2.Qe2#
- 1...a2
  - 2.Sb2#
Tries
- 1.Sa5?
  - threat
    - 2.Qxa3#
    - 2.Qe3#
  - 1...Rxa4
    - 2.Qe3#
  - 1...Rb4
    - 2.Qe3#
  - 1...Rc4
    - 2.Qe3#
  - 1...Rd5
    - 2.Qe3#
  - 1...Rd6
    - 2.Qe3#
  - 1...Rd7
    - 2.Qe3#
  - 1...Rd8
    - 2.Qe3#
  - 1...Se2
    - 2.Qxe2#
    - 2.Qe3#
  - 1...Sg2
    - 2.Qxa3#
    - 2.Qe2#
  - 1...Sd5
    - 2.Qe2#
  - 1...Se6
    - 2.Qxa3#
  - 1...a2
    - 2.Qa3#
    - 2.Qe3#
  - 1...Re4!
- 1.Sb6?
  - threat
    - 2.Qxa3#
    - 2.Qe3#
  - 1...Rxa4
    - 2.Qe3#
  - 1...Rb4
    - 2.Qe3#
  - 1...Rc4
    - 2.Qe3#
  - 1...Rd5
    - 2.Qe3#
  - 1...Rd6
    - 2.Qe3#
  - 1...Rd7
    - 2.Qe3#
  - 1...Rd8
    - 2.Qe3#
  - 1...Se2
    - 2.Qxe2#
    - 2.Qe3#
  - 1...Sg2
    - 2.Qxa3#
    - 2.Qe2#
  - 1...Sd5
    - 2.Qe2#
  - 1...Se6
    - 2.Qxa3#
  - 1...a2
    - 2.Qa3#
    - 2.Qe3#
  - 1...Re4!
Keys
- 1.Qe5!
  - 1...Kxc4
    - 2.Qb5#
  - 1...Rxc4
    - 2.Qe3#
  - 1...fxe5
    - 2.Sxe5#
  - 1...Re4
    - 2.Qc3#
  - 1...Rd5
    - 2.Qc3#
  - 1...Rd6
    - 2.Qc3#
  - 1...Rd7
    - 2.Qc3#
  - 1...Rd8
    - 2.Qc3#
  - 1...Se2
    - 2.Qxe2#
  - 1...Sg2
    - 2.Qe2#
  - 1...Sh3
    - 2.Qe2#
  - 1...Sd5
    - 2.Qe2#
  - 1...Sh5
    - 2.Qe2#
  - 1...Se6
    - 2.Qe2#
  - 1...Sg6
    - 2.Qe2#
  - 1...a2
    - 2.Sb2#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 0
Sets
- R(c);SBLOCK,XS(E)::QAR1(F)
- S(d);N_GUARD::QAB1(F),XS(d)
- S(d);N_GUARD::QAB1(F)
- P(a);N_GUARD::S(E)
Tries
- Try
  - S(E);
  - Threat
    - DUALS(2)
  - Vars
    - R(c);XP(D)::QAR1(F)
    - R(c);::QAR1(F)
    - S(d);N_GUARD::QAB1(F)
    - S(d);::QAR(F),XP(a)
  - Refutation
    - R(c);
- Try
  - S(E);
  - Threat
    - DUALS(2)
  - Vars
    - R(c);XP(D)::QAR1(F)
    - R(c);::QAR1(F)
    - S(d);N_GUARD::QAB1(F)
    - S(d);::QAR(F),XP(a)
  - Refutation
    - R(c);
Actual
- Q(F);
- Vars
  - K(b);OGATEB,P_PINP(B),S_FLIGHT,XS(E)::QAB1(F)
  - R(c);SBLOCK,XS(E)::QAR1(F)
  - P(f);XQ(F)::S(E),XP(f)
  - R(c);OGATE::QAR1(F)
  - S(d);N_GUARD::QAB1(F),XS(d)
  - S(d);N_GUARD::QAB1(F)
  - P(a);N_GUARD::S(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).