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Problem Display

PID: 170489 (1R2K2k/6qP/5BP1/8/8/8/8/8 w - - 0 1)

Hoffmann, Martin Wolfgang

Basler Nachrichten, 1973

1R2K2k/6qP/5BP1/8/8/8/8/8

#2

5 + 2

5454	Near Snap	2018
6490	yacpdb	2018

SOLUTION

SOUND
Tries
- 1.Bb2?
  - 1...Qe5+
    - 2.Kf7#
    - 2.Bxe5#
  - 1...Qc3
    - 2.Kf7#
    - 2.Bxc3#
  - 1...Qd4
    - 2.Kf7#
    - 2.Bxd4#
  - 1...Qf6
    - 2.Bxf6#
  - 1...Qxb2!
- 1.Bc3?
  - 1...Qe5+
    - 2.Kf7#
    - 2.Bxe5#
  - 1...Qd4
    - 2.Kf7#
    - 2.Bxd4#
  - 1...Qf6
    - 2.Bxf6#
  - 1...Qxc3!
- 1.Bd4?
  - 1...Qe5+
    - 2.Kf7#
    - 2.Bxe5#
  - 1...Qf6
    - 2.Bxf6#
  - 1...Qxd4!
- 1.Be5?
  - 1...Qf6
    - 2.Bxf6#
  - 1...Qxe5+!
Keys
- 1.Ba1!
  - 1...Qe5+
    - 2.Kf7#
    - 2.Bxe5#
  - 1...Qxa1
    - 2.Kf7#
  - 1...Qb2
    - 2.Kf7#
    - 2.Bxb2#
  - 1...Qc3
    - 2.Kf7#
    - 2.Bxc3#
  - 1...Qd4
    - 2.Kf7#
    - 2.Bxd4#
  - 1...Qf6
    - 2.Bxf6#

This anticipates 167314(1988)

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
Tries
- Try
  - B(A);
  - Vars
    - Q(a);OGATEB::B(A),XQ(a)
  - Refutation
    - Q(a);N_SPINQ(a),XB(A)
- Try
  - B(A);
  - Vars
    - Q(a);OGATEB::B(A),XQ(a)
  - Refutation
    - Q(a);N_SPINQ(a),XB(A)
- Try
  - B(A);
  - Vars
    - Q(a);OGATEB::B(A),XQ(a)
  - Refutation
    - Q(a);N_SPINQ(a),XB(A)
- Try
  - B(A);
  - Vars
    - Q(a);OGATEB::B(A),XQ(a)
  - Refutation
    - Q(a);CHECK,N_SPINQ(a),XB(A)
Actual
- B(A);
- Vars
  - Q(a);N_SPINQ(a),XB(A)::R(D)+K(E)
  - Q(a);OGATEB::B(A),XQ(a)

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).