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Problem Display

PID: 91841 (8/q7/RB6/8/b7/1B6/2p5/k1K5 w - - 0 1)

Brunner, Erich Anselm

Deutsche Schachblatter, 1939

8/q7/RB6/8/b7/1B6/2p5/k1K5

#2

4 + 4

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Qxb6
  - 2.Rxa4#
- 1...Qb8
  - 2.Bd4#
  - 2.Rxa4#
- 1...Qxa6
  - 2.Bd4#
- 1...Qb7
  - 2.Bd4#
  - 2.Rxa4#
- 1...Qc7
  - 2.Rxa4#
- 1...Qe7
  - 2.Bd4#
- 1...Qf7
  - 2.Bd4#
  - 2.Rxa4#
- 1...Qg7
  - 2.Rxa4#
- 1...Qh7
  - 2.Bd4#
  - 2.Rxa4#
- 1...Qa8
  - 2.Bd4#
Tries
- 1.Bc4?
  - 1...Qxb6
    - 2.Rxa4#
  - 1...Qxa6
    - 2.Bd4#
  - 1...Qb8
    - 2.Rxa4#
  - 1...Qb7
    - 2.Rxa4#
  - 1...Qc7
    - 2.Bd4#
    - 2.Rxa4#
  - 1...Qe7
    - 2.Bd4#
  - 1...Qf7
    - 2.Bd4#
    - 2.Rxa4#
  - 1...Qg7
    - 2.Rxa4#
  - 1...Qh7
    - 2.Bd4#
    - 2.Rxa4#
  - 1...Qa8
    - 2.Bd4#
  - 1...Qd7!
- 1.Be6?
  - 1...Qxb6
    - 2.Rxa4#
  - 1...Qxa6
    - 2.Bd4#
  - 1...Qb8
    - 2.Rxa4#
  - 1...Qb7
    - 2.Rxa4#
  - 1...Qc7
    - 2.Rxa4#
  - 1...Qe7
    - 2.Bd4#
  - 1...Qf7
    - 2.Bd4#
    - 2.Rxa4#
  - 1...Qg7
    - 2.Rxa4#
  - 1...Qh7
    - 2.Bd4#
    - 2.Rxa4#
  - 1...Qa8
    - 2.Bd4#
  - 1...Qd7!
Keys
- 1.Bd5!
  - 1...Qxb6
    - 2.Rxa4#
  - 1...Qxa6
    - 2.Bd4#
  - 1...Qb8
    - 2.Rxa4#
  - 1...Qb7
    - 2.Rxa4#
  - 1...Qc7
    - 2.Rxa4#
  - 1...Qd7
    - 2.Bd4#
  - 1...Qe7
    - 2.Bd4#
  - 1...Qf7
    - 2.Bd4#
    - 2.Rxa4#
  - 1...Qg7
    - 2.Rxa4#
  - 1...Qh7
    - 2.Bd4#
    - 2.Rxa4#
  - 1...Qa8
    - 2.Bd4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
Sets
- Q(d);N_GUARD,XB(D)::R(C),XB(c)
- Q(d);N_GUARD,N_SPINB(c),XR(C)::B(D)
- Q(d);N_GUARD::R(C),XB(c)
- Q(d);N_GUARD::B(D)
Tries
- Try
  - B(B);
  - Vars
    - Q(d);N_GUARD,XB(D)::R(C),XB(c)
    - Q(d);N_GUARD,N_SPINB(c),XR(C)::B(D)
    - Q(d);N_GUARD::R(C),XB(c)
    - Q(d);N_GUARD::B(D)
  - Refutation
    - Q(d);
- Try
  - B(B);
  - Vars
    - Q(d);N_GUARD,XB(D)::R(C),XB(c)
    - Q(d);N_GUARD,N_SPINB(c),XR(C)::B(D)
    - Q(d);N_GUARD::R(C),XB(c)
    - Q(d);N_GUARD::B(D)
  - Refutation
    - Q(d);
Actual
- B(B);
- Vars
  - Q(d);N_GUARD,XB(D)::R(C),XB(c)
  - Q(d);N_GUARD,N_SPINB(c),XR(C)::B(D)
  - Q(d);N_GUARD::R(C),XB(c)
  - Q(d);N_GUARD::B(D)

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).