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Problem Display

PID: 76475 (k7/p7/K5P1/4Bp2/1N2p3/8/1b6/1Q6 w - - 0 1)

Lakeland, Rev T

The Tablet, 1932

(First published on Sat Jun 4 1932)

k7/p7/K5P1/4Bp2/1N2p3/8/1b6/1Q6

#2

5 + 5

15239	Valois Notebooks	2014

SOLUTION

SOUND
Sets
- 1...e3
  - 2.Qh1#
- 1...f4
  - 2.Qxe4#
Tries
- 1.Sc2?
  - 1...Bxe5
    - 2.Qb7#
  - 1...Ba1
    - 2.Qb7#
    - 2.Qb8#
  - 1...Bc1
    - 2.Qb7#
    - 2.Qb8#
  - 1...Ba3
    - 2.Qb7#
    - 2.Qb8#
  - 1...Bc3
    - 2.Qb7#
    - 2.Qb8#
  - 1...Bd4
    - 2.Qb7#
    - 2.Qb8#
  - 1...e3
    - 2.Qh1#
  - 1...f4!
- 1.Sd3?
  - 1...Bxe5
    - 2.Qb7#
  - 1...exd3
    - 2.Qh1#
  - 1...Ba1
    - 2.Qb7#
    - 2.Qb8#
  - 1...Bc1
    - 2.Qb7#
    - 2.Qb8#
  - 1...Ba3
    - 2.Qb7#
    - 2.Qb8#
  - 1...Bc3
    - 2.Qb7#
    - 2.Qb8#
  - 1...Bd4
    - 2.Qb7#
    - 2.Qb8#
  - 1...e3
    - 2.Qh1#
  - 1...f4!
- 1.Qg1?
  - threat
    - 2.Qxa7#
  - 1...e3
    - 2.Qh1#
    - 2.Qg2#
  - 1...Bd4!
- 1.Qxb2?
  - 1...e3
    - 2.Qg2#
  - 1...f4!
- 1.g7?
  - threat
    - 2.g8Q#
    - 2.g8R#
  - 1...f4
    - 2.Qxe4#
    - 2.g8Q#
    - 2.g8R#
  - 1...Ba1
    - 2.g8Q#
    - 2.g8R#
  - 1...Bc1
    - 2.g8Q#
    - 2.g8R#
  - 1...Ba3
    - 2.g8Q#
    - 2.g8R#
  - 1...Bc3
    - 2.g8Q#
    - 2.g8R#
  - 1...Bd4
    - 2.g8Q#
    - 2.g8R#
  - 1...e3
    - 2.Qh1#
    - 2.g8Q#
    - 2.g8R#
  - 1...Bxe5!
Keys
- 1.Sa2!
  - 1...Bxe5
    - 2.Qb7#
  - 1...Ba1
    - 2.Qb7#
    - 2.Qb8#
  - 1...Bc1
    - 2.Qb7#
    - 2.Qb8#
  - 1...Ba3
    - 2.Qb7#
    - 2.Qb8#
  - 1...Bc3
    - 2.Qb7#
    - 2.Qb8#
  - 1...Bd4
    - 2.Qb7#
    - 2.Qb8#
  - 1...e3
    - 2.Qh1#
  - 1...f4
    - 2.Qxe4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- P(b);OGATEB::QAB(A)
- P(c);N_GUARD::QAB(A),XP(b)
Tries
- Try
  - S(B);
  - Vars
    - B(a);OGATE,XB(C)::QAB1(A)
    - P(b);OGATEB::QAB(A)
  - Refutation
    - P(c);
- Try
  - S(B);
  - Vars
    - B(a);OGATE,XB(C)::QAB1(A)
    - P(b);OGATEB,XS(B)::QAB(A)
    - P(b);OGATEB::QAB(A)
  - Refutation
    - P(c);
- Try
  - Q(A);
  - Threat
    - QAR1(A),XP(d)
  - Refutation
    - B(a);
- Try
  - Q(A);XB(a)
  - Vars
    - P(b);OGATEB::QAB(A)
  - Refutation
    - P(c);
- Try
  - P(E);
  - Threat
    - P=Q
  - Vars
    - B(a);::P=Q
  - Refutation
    - B(a);XB(C)
Actual
- S(B);
- Vars
  - B(a);OGATE,XB(C)::QAB1(A)
  - P(b);OGATEB::QAB(A)
  - P(c);N_GUARD::QAB(A),XP(b)

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).