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Problem Display

PID: 219091 (7Q/2N5/R4n2/4N3/1k6/1B6/K3P3/8 w - - 0 1)

Singer, Max

Wiener Hausfrauen-Zeitung, 1882

7Q/2N5/R4n2/4N3/1k6/1B6/K3P3/8

#2

7 + 2

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...Se4
  - 2.Sd3#
- 1...Sg4
  - 2.Sd3#
- 1...Sd5
  - 2.Sd3#
- 1...Sh5
  - 2.Sd3#
- 1...Sd7
  - 2.Sd3#
- 1...Sh7
  - 2.Sd3#
- 1...Se8
  - 2.Sd3#
- 1...Sg8
  - 2.Sd3#
Tries
- 1.Kb2?
  - threat
    - 2.Sd3#
    - 2.Qf8#
  - 1...Se4
    - 2.Sd3#
  - 1...Sd5
    - 2.Sd3#
  - 1...Sd7
    - 2.Sd3#
  - 1...Sh7
    - 2.Sd3#
  - 1...Se8
    - 2.Sd3#
  - 1...Sg8
    - 2.Sd3#
  - 1...Kc5!
- 1.Sc6+?
  - 1...Kc5
    - 2.Qf8#
  - 1...Kc3!
- 1.Sd7?
  - 1...Sxd7
    - 2.Qd4#
  - 1...Se4
    - 2.Ra4#
    - 2.Qd4#
  - 1...Sg4
    - 2.Ra4#
    - 2.Qd4#
  - 1...Sd5
    - 2.Ra4#
    - 2.Qd4#
  - 1...Sh5
    - 2.Ra4#
    - 2.Qd4#
  - 1...Sh7
    - 2.Ra4#
    - 2.Qd4#
  - 1...Se8
    - 2.Ra4#
    - 2.Qd4#
  - 1...Sg8
    - 2.Ra4#
    - 2.Qd4#
  - 1...Kc3!
- 1.Qxf6?
  - threat
    - 2.Sd3#
  - 1...Kc5
    - 2.Sd3#
    - 2.Qb6#
    - 2.Qd6#
  - 1...Kc3!
- 1.Qb8+?
  - 1...Kc5
    - 2.Se6#
    - 2.Qb6#
  - 1...Kc3!
- 1.e3?
  - 1...Kc5
    - 2.Sd3#
    - 2.Qf8#
  - 1...Se4
    - 2.Sd3#
  - 1...Sg4
    - 2.Sd3#
  - 1...Sd5
    - 2.Sd3#
  - 1...Sh5
    - 2.Sd3#
  - 1...Sd7
    - 2.Sd3#
  - 1...Sh7
    - 2.Sd3#
  - 1...Se8
    - 2.Sd3#
  - 1...Sg8
    - 2.Sd3#
  - 1...Kc3!
Keys
- 1.Sf3!
  - 1...Kc3
    - 2.Sd5#
  - 1...Kc5
    - 2.Qf8#
  - 1...Se4
    - 2.Qd4#
  - 1...Sg4
    - 2.Qd4#
  - 1...Sd5
    - 2.Qd4#
  - 1...Sh5
    - 2.Qd4#
  - 1...Sd7
    - 2.Qd4#
  - 1...Sh7
    - 2.Qd4#
  - 1...Se8
    - 2.Qd4#
  - 1...Sg8
    - 2.Qd4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 8
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
- S(b);::S(D)
Tries
- Try
  - K(A);P-FLIGHT
  - Threat
    - DUALS(2)
  - Vars
    - S(b);::S(D)
  - Refutation
    - K(a);S_FLIGHT
- Try
  - S(D);CHECK
  - Vars
    - K(a);S_FLIGHT::QAB(G)
  - Refutation
    - K(a);P_SPINS(b),S_FLIGHT
- Try
  - S(D);
  - Vars
    - S(b);OGATE,XS(D)::QAR2(G)
  - Refutation
    - K(a);P_SPINS(b),S_FLIGHT
- Try
  - Q(G);XS(b)
  - Threat
    - S(D)
  - Refutation
    - K(a);S_FLIGHT
- Try
  - Q(G);CHECK
  - Refutation
    - K(a);S_FLIGHT
- Try
  - P(B);
  - Vars
    - S(b);::S(D)
  - Refutation
    - K(a);S_FLIGHT
Actual
- S(D);
- Vars
  - K(a);P_SPINS(b),S_FLIGHT::S(F)
  - K(a);S_FLIGHT::QAB(G)
  - S(b);OGATE::QAR2(G)

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).