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Problem Display

PID: 233200 (K2k4/3P1p2/2BN2b1/2nN4/7b/8/6Q1/8 w - - 0 1)

Lindner, Erich

Freie Presse, 1969

K2k4/3P1p2/2BN2b1/2nN4/7b/8/6Q1/8

#2

6 + 5

15148	Sadier Collection	2021

SOLUTION

SOUND
Sets
- 1...Bb1
  - 2.Sxf7#
  - 2.Qg8#
- 1...Bc2
  - 2.Sxf7#
  - 2.Qg8#
- 1...Bd3
  - 2.Sxf7#
  - 2.Qg8#
- 1...Be4
  - 2.Sxf7#
  - 2.Qg8#
- 1...Bf5
  - 2.Sxf7#
  - 2.Qg8#
- 1...Bh5
  - 2.Qg8#
- 1...Bh7
  - 2.Sxf7#
- 1...Sb3
  - 2.Sb7#
- 1...Sd3
  - 2.Sb7#
- 1...Sa4
  - 2.Sb7#
- 1...Se4
  - 2.Sb7#
- 1...Sa6
  - 2.Sb7#
- 1...Se6
  - 2.Sb7#
- 1...Sb7
  - 2.Sxb7#
Tries
- 1.Qb2?
  - threat
    - 2.Qh8#
    - 2.Qb6#
    - 2.Qb8#
  - 1...Bf6
    - 2.Qxf6#
    - 2.Qb6#
    - 2.Qb8#
  - 1...Be7
    - 2.Qb6#
    - 2.Qb8#
  - 1...Bh7
    - 2.Sxf7#
    - 2.Qb6#
    - 2.Qb8#
  - 1...Sb3
    - 2.Sb7#
    - 2.Qh8#
  - 1...Sa4
    - 2.Sb7#
    - 2.Qh8#
    - 2.Qb8#
  - 1...Sa6
    - 2.Sb7#
    - 2.Qh8#
  - 1...Se6
    - 2.Sb7#
    - 2.Qb8#
  - 1...Sb7
    - 2.Sxb7#
    - 2.Qh8#
    - 2.Qb6#
  - 1...f5
    - 2.Qb6#
    - 2.Qb8#
  - 1...f6
    - 2.Qb6#
    - 2.Qb8#
  - 1...Sxd7!
- 1.Qe2?
  - threat
    - 2.Qe8#
  - 1...Be7
    - 2.Qxe7#
  - 1...Be4
    - 2.Sxf7#
  - 1...Se4
    - 2.Sb7#
  - 1...Se6
    - 2.Sb7#
  - 1...f6
    - 2.Qe7#
  - 1...f5!
- 1.Qxg6?
  - threat
    - 2.Sxf7#
    - 2.Qg8#
  - 1...fxg6
    - 2.Sf7#
  - 1...Be7
    - 2.Sxf7#
  - 1...Se6
    - 2.Sb7#
    - 2.Sxf7#
  - 1...f5
    - 2.Sf7#
    - 2.Qe8#
    - 2.Qg8#
  - 1...f6
    - 2.Sf7#
    - 2.Qe8#
    - 2.Qg8#
  - 1...Sxd7!
Keys
- 1.Qe4!
  - threat
    - 2.Qe8#
  - 1...Bxe4
    - 2.Sxf7#
  - 1...Sxe4
    - 2.Sb7#
  - 1...Be7
    - 2.Qxe7#
  - 1...Se6
    - 2.Sb7#
  - 1...f5
    - 2.Qxh4#
  - 1...f6
    - 2.Qe7#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 7
Sets
- B(c);OGATE::QAR(A)
- B(c);N_GUARD::S(D),XP(d)
- S(b);N_GUARD::S(D)
- S(b);N_GUARD::S(D),XS(b)
Tries
- Try
  - Q(A);
  - Threat
    - DUALS(3)
  - Refutation
    - S(b);XP(E)
- Try
  - Q(A);
  - Threat
    - QAR1(A)
  - Vars
    - B(a);N_GUARD::QAB1(A),XB(a)
    - B(c);N_GUARD::S(D),XP(d)
    - S(b);N_GUARD::S(D)
    - P(d);S_CUTB(a)::QAB1(A)
  - Refutation
    - P(d);
- Try
  - Q(A);XB(c)
  - Threat
    - DUALS(2)
  - Vars
    - P(d);XQ(A)::S(D)
    - B(a);::S(D),XP(d)
  - Refutation
    - S(b);XP(E)
Actual
- Q(A);
- Threat
  - QAR1(A)
- Vars
  - B(c);N_GUARD,XQ(A)::S(D),XP(d)
  - S(b);N_GUARD,XQ(A)::S(D)
  - B(a);N_GUARD::QAB1(A),XB(a)
  - S(b);N_GUARD::S(D)
  - P(d);N_GUARD::QAB(A),XB(a)
  - P(d);S_CUTB(a)::QAB1(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).