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Problem Display

PID: 210076 (8/8/8/8/1N6/4K3/b1Q5/k1n5 w - - 0 1)

Froberg, Johan Hilding Laurentius

Land og Folk, 1978

8/8/8/8/1N6/4K3/b1Q5/k1n5

#2

3 + 3

15148	Sadier Collection	2020

SOLUTION

SOUND
Sets
- 1...Bb1
  - 2.Qc3#
- 1...Bb3
  - 2.Qxc1#
- 1...Bc4
  - 2.Qxc1#
- 1...Bd5
  - 2.Qxc1#
- 1...Be6
  - 2.Qxc1#
- 1...Bf7
  - 2.Qxc1#
- 1...Bg8
  - 2.Qxc1#
- 1...Se2
  - 2.Qxa2#
- 1...Sb3
  - 2.Qxa2#
- 1...Sd3
  - 2.Qxa2#
Tries
- 1.Kd2?
  - 1...Bb1
    - 2.Qc3#
  - 1...Bb3
    - 2.Qxc1#
  - 1...Bc4
    - 2.Qxc1#
  - 1...Bd5
    - 2.Qxc1#
  - 1...Be6
    - 2.Qxc1#
  - 1...Bf7
    - 2.Qxc1#
  - 1...Bg8
    - 2.Qxc1#
  - 1...Se2
    - 2.Qxa2#
  - 1...Sd3
    - 2.Qxa2#
  - 1...Sb3+!
- 1.Kf2?
  - 1...Bb1
    - 2.Qc3#
  - 1...Bb3
    - 2.Qxc1#
  - 1...Bc4
    - 2.Qxc1#
  - 1...Bd5
    - 2.Qxc1#
  - 1...Be6
    - 2.Qxc1#
  - 1...Bf7
    - 2.Qxc1#
  - 1...Bg8
    - 2.Qxc1#
  - 1...Se2
    - 2.Qxa2#
  - 1...Sb3
    - 2.Qxa2#
  - 1...Sd3+!
- 1.Kf3?
  - 1...Bb1
    - 2.Qc3#
  - 1...Bb3
    - 2.Qxc1#
  - 1...Bc4
    - 2.Qxc1#
  - 1...Be6
    - 2.Qxc1#
  - 1...Bf7
    - 2.Qxc1#
  - 1...Bg8
    - 2.Qxc1#
  - 1...Se2
    - 2.Qxa2#
  - 1...Sb3
    - 2.Qxa2#
  - 1...Sd3
    - 2.Qxa2#
  - 1...Bd5+!
- 1.Qd2?
  - 1...Bb1
    - 2.Qc3#
    - 2.Qd4#
  - 1...Bb3
    - 2.Qxc1#
  - 1...Bc4
    - 2.Qxc1#
  - 1...Bd5
    - 2.Qxc1#
  - 1...Be6
    - 2.Qxc1#
  - 1...Bf7
    - 2.Qxc1#
  - 1...Bg8
    - 2.Qxc1#
  - 1...Se2
    - 2.Qxa2#
  - 1...Sb3
    - 2.Qxa2#
  - 1...Sd3
    - 2.Qxa2#
  - 1...Kb1!
Keys
- 1.Qxc1+!
  - 1...Bb1
    - 2.Qc3#

FEATURES

Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 9
Sets
- B(c);SBLOCK::QAB(A)
- B(c);N_GUARD::QAR2(A),XS(b)
- S(b);N_GUARD::QAR1(A),XB(c)
Tries
- Try
  - K(B);S_FLIGHT
  - Vars
    - B(c);SBLOCK::QAB(A)
    - B(c);N_GUARD::QAR2(A),XS(b)
    - S(b);N_GUARD::QAR1(A),XB(c)
  - Refutation
    - S(b);CHECK
- Try
  - K(B);S_FLIGHT
  - Vars
    - B(c);SBLOCK::QAB(A)
    - B(c);N_GUARD::QAR2(A),XS(b)
    - S(b);N_GUARD::QAR1(A),XB(c)
  - Refutation
    - S(b);CHECK
- Try
  - K(B);P-FLIGHT
  - Vars
    - B(c);SBLOCK::QAB(A)
    - B(c);N_GUARD::QAR2(A),XS(b)
    - S(b);N_GUARD::QAR1(A),XB(c)
  - Refutation
    - B(c);CHECK
- Try
  - Q(A);
  - Vars
    - B(c);N_GUARD::QAR2(A),XS(b)
    - S(b);N_GUARD::QAR1(A),XB(c)
  - Refutation
    - K(a);P-FLIGHT
Actual
- Q(A);CHECK,XS(b)
- Vars
  - B(c);P_SPINB(c),SBLOCK::QAB(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).