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Problem Display

PID: 23610 (8/8/8/8/8/1N1QK3/1k2N3/R1r5 w - - 0 1)

Knuppert, Hugo

Weekend, 1943

8/8/8/8/8/1N1QK3/1k2N3/R1r5

#2

5 + 2

3295	Einfuhrung in die Welt des Schachproblem	1984

SOLUTION

SOUND
Sets
- 1...Rb1
  - 2.Qxb1#
  - 2.Qc3#
- 1...Rd1
  - 2.Qc3#
- 1...Re1
  - 2.Qc3#
- 1...Rf1
  - 2.Qc3#
- 1...Rg1
  - 2.Qc3#
- 1...Rh1
  - 2.Qc3#
- 1...Rc3
  - 2.Qxc3#
- 1...Rc4
  - 2.Qb1#
- 1...Rc5
  - 2.Qb1#
- 1...Rc6
  - 2.Qb1#
- 1...Rc7
  - 2.Qb1#
- 1...Rc8
  - 2.Qb1#
Tries
- 1.Sbd4?
  - threat
    - 2.Qa3#
  - 1...Rxa1
    - 2.Qb3#
  - 1...Rc3
    - 2.Qxc3#
  - 1...Kxa1!
- 1.Sa5?
  - 1...Rxa1
    - 2.Qb3#
  - 1...Rb1
    - 2.Qxb1#
    - 2.Qc3#
  - 1...Rd1
    - 2.Qc3#
  - 1...Re1
    - 2.Qc3#
  - 1...Rf1
    - 2.Qc3#
  - 1...Rg1
    - 2.Qc3#
  - 1...Rh1
    - 2.Qc3#
  - 1...Rc2
    - 2.Qa3#
  - 1...Rc3
    - 2.Qxc3#
  - 1...Rc4
    - 2.Qb1#
  - 1...Rc5
    - 2.Qb1#
  - 1...Rc6
    - 2.Qb1#
  - 1...Rc7
    - 2.Qb1#
  - 1...Rc8
    - 2.Qb1#
  - 1...Kxa1!
- 1.Sc5?
  - 1...Rxa1
    - 2.Qb3#
  - 1...Rxc5
    - 2.Qb1#
  - 1...Rb1
    - 2.Qxb1#
    - 2.Qc3#
  - 1...Rd1
    - 2.Qc3#
  - 1...Re1
    - 2.Qc3#
  - 1...Rf1
    - 2.Qc3#
  - 1...Rg1
    - 2.Qc3#
  - 1...Rh1
    - 2.Qc3#
  - 1...Rc2
    - 2.Qa3#
  - 1...Rc3
    - 2.Qxc3#
  - 1...Rc4
    - 2.Qb1#
  - 1...Kxa1!
Keys
- 1.Sd2!
  - 1...Kxa1
    - 2.Qa3#
  - 1...Rxa1
    - 2.Qb3#
  - 1...Rb1
    - 2.Qxb1#
    - 2.Qc3#
  - 1...Rd1
    - 2.Qc3#
  - 1...Re1
    - 2.Qc3#
  - 1...Rf1
    - 2.Qc3#
  - 1...Rg1
    - 2.Qc3#
  - 1...Rh1
    - 2.Qc3#
  - 1...Rc2
    - 2.Qa3#
  - 1...Rc3
    - 2.Qxc3#
  - 1...Rc4
    - 2.Qb1#
  - 1...Rc5
    - 2.Qb1#
  - 1...Rc6
    - 2.Qb1#
  - 1...Rc7
    - 2.Qb1#
  - 1...Rc8
    - 2.Qb1#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
Sets
- R(a);N_GUARD::QAB1(D)
- R(a);N_GUARD,P_PINS(B)::QAB1(D)
- R(a);N_GUARD,P_PINQ(D)::QAB1(D),XR(a)
- R(a);N_GUARD::QAR1(D)
Tries
- Try
  - S(C);
  - Threat
    - QAB1(D)
  - Vars
    - R(a);SBLOCK,XR(A)::QAR1(D)
    - R(a);N_GUARD,P_PINQ(D)::QAB1(D),XR(a)
  - Refutation
    - K(b);S_FLIGHT,XR(A)
- Try
  - S(C);
  - Vars
    - R(a);SBLOCK,XR(A)::QAR1(D)
    - R(a);N_GUARD::QAB1(D)
    - R(a);N_GUARD,P_PINS(B)::QAB1(D)
    - R(a);SBLOCK::QAB1(D)
    - R(a);N_GUARD,P_PINQ(D)::QAB1(D),XR(a)
    - R(a);N_GUARD::QAR1(D)
  - Refutation
    - K(b);S_FLIGHT,XR(A)
- Try
  - S(C);
  - Vars
    - R(a);SBLOCK,XR(A)::QAR1(D)
    - R(a);N_GUARD,XS(C)::QAR1(D)
    - R(a);N_GUARD::QAB1(D)
    - R(a);N_GUARD,P_PINS(B)::QAB1(D)
    - R(a);SBLOCK::QAB1(D)
    - R(a);N_GUARD,P_PINQ(D)::QAB1(D),XR(a)
    - R(a);N_GUARD::QAR1(D)
  - Refutation
    - K(b);S_FLIGHT,XR(A)
Actual
- S(C);
- Vars
  - K(b);S_FLIGHT,XR(A)::QAR2(D)
  - R(a);SBLOCK,XR(A)::QAR1(D)
  - R(a);N_GUARD::QAB1(D)
  - R(a);N_GUARD,P_PINS(B)::QAB1(D)
  - R(a);SBLOCK::QAB1(D)
  - R(a);N_GUARD,P_PINQ(D)::QAB1(D),XR(a)
  - R(a);N_GUARD::QAR1(D)

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).