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Problem Display

PID: 66560 (7b/8/N2pP1nB/3Pk3/P1P5/1P4N1/8/qbQ1K3 w - - 0 1)

Jespersen, Karl Lorenz Jesper

3rd Prize, Nuova Rivista degli Scacchi, 1881

7b/8/N2pP1nB/3Pk3/P1P5/1P4N1/8/qbQ1K3

#2

10 + 6

5689	The Chess Monthly (Hoffer)	1882

SOLUTION

SOUND
Sets
- 1...Kd4
  - 2.Qe3#
- 1...Kf6
  - 2.Qg5#
- 1...Qb2
  - 2.Qxb2#
- 1...Qc3+
  - 2.Qxc3#
- 1...Qa2
  - 2.Qc3#
- 1...Qa3
  - 2.Qc3#
- 1...Qxa4
  - 2.Qb2#
  - 2.Qc3#
- 1...Ba2
  - 2.Qxa1#
- 1...Bc2
  - 2.Qxa1#
- 1...Bd3
  - 2.Qxa1#
- 1...Be4
  - 2.Qxa1#
- 1...Bf5
  - 2.Qxa1#
- 1...Bg7
  - 2.Bxg7#
- 1...Sf4
  - 2.Qxf4#
- 1...Sh4
  - 2.Qf4#
- 1...Se7
  - 2.Qf4#
- 1...Sf8
  - 2.Qf4#
Tries
- 1.Sb4?
  - 1...Qc3+
    - 2.Qxc3#
  - 1...Kd4
    - 2.Qe3#
  - 1...Kf6
    - 2.Qg5#
  - 1...Qxa4
    - 2.Qb2#
    - 2.Qc3#
  - 1...Qb2
    - 2.Qxb2#
  - 1...Qa2
    - 2.Qc3#
  - 1...Qa3
    - 2.Qc3#
  - 1...Ba2
    - 2.Qxa1#
  - 1...Bc2
    - 2.Qxa1#
  - 1...Bd3
    - 2.Qxa1#
  - 1...Be4
    - 2.Qxa1#
  - 1...Bf5
    - 2.Qxa1#
  - 1...Bf6
    - 2.Sc6#
  - 1...Bg7
    - 2.Bxg7#
  - 1...Sf4
    - 2.Qxf4#
  - 1...Sh4
    - 2.Qf4#
  - 1...Se7
    - 2.Qf4#
  - 1...Sf8
    - 2.Qf4#
  - 1...Qd4!
- 1.Qe3+?
  - 1...Kf6
    - 2.Qg5#
  - 1...Be4+!
- 1.Qg5+?
  - 1...Kd4
    - 2.Qe3#
  - 1...Bf5+!
Keys
- 1.Sb8!
  - 1...Qc3+
    - 2.Qxc3#
  - 1...Kd4
    - 2.Qe3#
  - 1...Kf6
    - 2.Qg5#
  - 1...Qxa4
    - 2.Qb2#
    - 2.Qc3#
  - 1...Qd4
    - 2.Sd7#
  - 1...Qb2
    - 2.Qxb2#
  - 1...Qa2
    - 2.Qc3#
  - 1...Qa3
    - 2.Qc3#
  - 1...Ba2
    - 2.Qxa1#
  - 1...Bc2
    - 2.Qxa1#
  - 1...Bd3
    - 2.Qxa1#
  - 1...Be4
    - 2.Qxa1#
  - 1...Bf5
    - 2.Qxa1#
  - 1...Bf6
    - 2.Sc6#
  - 1...Bg7
    - 2.Bxg7#
  - 1...Sf4
    - 2.Qxf4#
  - 1...Sh4
    - 2.Qf4#
  - 1...Se7
    - 2.Qf4#
  - 1...Sf8
    - 2.Qf4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
- K(c);S_FLIGHT::QAB1(A)
- Q(a);N_GUARD::QAB(A),XQ(a)
- Q(a);CHECK,N_GUARD::QAB(A),XQ(a)
- Q(a);N_GUARD::QAB(A)
- B(b);OGATE,P_PINQ(A)::QAB(A),XQ(a)
- B(f);N_GUARD::B(J),XB(f)
- S(e);N_GUARD::QAB1(A),XS(e)
- S(e);N_GUARD::QAB1(A)
Tries
- Try
  - S(H);
  - Vars
    - Q(a);CHECK,N_GUARD::QAB(A),XQ(a)
    - K(c);S_FLIGHT::QAB1(A)
    - Q(a);N_GUARD::QAB(A),XQ(a)
    - Q(a);N_GUARD::QAB(A)
    - B(b);OGATE,P_PINQ(A)::QAB(A),XQ(a)
    - B(f);SBLOCK::S(H)
    - B(f);N_GUARD::B(J),XB(f)
    - S(e);N_GUARD::QAB1(A),XS(e)
    - S(e);N_GUARD::QAB1(A)
  - Refutation
    - Q(a);
- Try
  - Q(A);CHECK
  - Vars
    - K(c);S_FLIGHT::QAB1(A)
  - Refutation
    - B(b);CHECK,P_SPINB(b)
- Try
  - Q(A);CHECK
  - Vars
    - K(c);S_FLIGHT::QAB1(A)
  - Refutation
    - B(b);CHECK,P_SPINB(b)
Actual
- S(H);
- Vars
  - Q(a);CHECK,N_GUARD::QAB(A),XQ(a)
  - K(c);S_FLIGHT::QAB1(A)
  - Q(a);SBLOCK::S(H)
  - Q(a);N_GUARD::QAB(A),XQ(a)
  - Q(a);N_GUARD::QAB(A)
  - B(b);OGATE,P_PINQ(A)::QAB(A),XQ(a)
  - B(f);SBLOCK::S(H)
  - B(f);N_GUARD::B(J),XB(f)
  - S(e);N_GUARD::QAB1(A),XS(e)
  - S(e);N_GUARD::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).