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Problem Display

PID: 7751 (8/8/1p6/n7/3p1K2/2NkP3/Q1p1p2R/1N6 w - - 0 1)

von Alvensleben, Wichard Udo Reinhard

Landeszeitung fur die Luneburger Heide, 1993

8/8/1p6/n7/3p1K2/2NkP3/Q1p1p2R/1N6

#2

6 + 6

6113	Problemschach-Jahrbuch (1993)	1994

SOLUTION

SOUND
Sets
- 1...c1Q
  - 2.Qxe2#
- 1...c1B
  - 2.Qxe2#
- 1...c1R
  - 2.Qxe2#
- 1...e1S
  - 2.Rd2#
- 1...e1R
  - 2.Rd2#
- 1...dxc3
  - 2.Qd5#
- 1...dxe3
  - 2.Qd5#
Tries
- 1.Sa4?
  - threat
    - 2.Sb2#
  - 1...cxb1Q
    - 2.Qxe2#
  - 1...cxb1S
    - 2.Qxe2#
  - 1...cxb1B
    - 2.Qxe2#
  - 1...cxb1R
    - 2.Qxe2#
  - 1...dxe3
    - 2.Qd5#
  - 1...c1Q
    - 2.Qxe2#
  - 1...c1B
    - 2.Qxe2#
  - 1...c1R
    - 2.Qxe2#
  - 1...Sc4
    - 2.Qb3#
  - 1...c1S!
- 1.Sb5?
  - 1...cxb1Q
    - 2.Qxe2#
  - 1...cxb1S
    - 2.Qxe2#
  - 1...cxb1B
    - 2.Qxe2#
  - 1...cxb1R
    - 2.Qxe2#
  - 1...dxe3
    - 2.Qd5#
  - 1...Sb3
    - 2.Qxb3#
  - 1...c1Q
    - 2.Qxe2#
  - 1...c1B
    - 2.Qxe2#
  - 1...c1R
    - 2.Qxe2#
  - 1...e1Q
    - 2.Qxc2#
  - 1...e1S
    - 2.Rd2#
  - 1...e1B
    - 2.Qxc2#
  - 1...e1R
    - 2.Rd2#
    - 2.Qxc2#
  - 1...Sc4
    - 2.Qb3#
  - 1...Sc6
    - 2.Qb3#
  - 1...Sb7
    - 2.Qb3#
  - 1...c1S!
- 1.Sd5?
  - threat
    - 2.Sb4#
  - 1...cxb1Q
    - 2.Qxe2#
  - 1...cxb1S
    - 2.Qxe2#
  - 1...cxb1B
    - 2.Qxe2#
  - 1...cxb1R
    - 2.Qxe2#
  - 1...Sb3
    - 2.Qxb3#
  - 1...e1Q
    - 2.Qxc2#
  - 1...e1B
    - 2.Qxc2#
  - 1...Sc6
    - 2.Qb3#
  - 1...dxe3!
Keys
- 1.Se4!
  - threat
    - 2.Sf2#
  - 1...cxb1Q
    - 2.Qxe2#
  - 1...cxb1S
    - 2.Qxe2#
  - 1...cxb1B
    - 2.Qxe2#
  - 1...cxb1R
    - 2.Qxe2#
  - 1...dxe3
    - 2.Qd5#
  - 1...Sb3
    - 2.Qxb3#
  - 1...e1Q
    - 2.Qxc2#
  - 1...e1S
    - 2.Rd2#
  - 1...e1B
    - 2.Qxc2#
  - 1...e1R
    - 2.Rd2#
    - 2.Qxc2#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 5
Sets
- P(a);OGATE,P_PINP(E)::QAB1(B),XP(b)
- P(a);OGATE::QAB1(B),XP(b)
- P(b);OGATE::R1(C)
- P(d);OGATEB,XS(D)::QAR2(B)
- P(d);OGATEB,XP(E)::QAR2(B)
Tries
- Try
  - S(D);
  - Threat
    - S(D)
  - Vars
    - P(a);OGATE,XS(A)::QAB1(B),XP(b)
    - P(d);OGATEB,XP(E)::QAR2(B)
    - P(a);OGATE,P_PINP(E)::QAB1(B),XP(b)
    - P(a);OGATE::QAB1(B),XP(b)
    - S(e);N_GUARD::QAR2(B)
  - Refutation
    - P(a);
- Try
  - S(D);
  - Vars
    - P(a);OGATE,XS(A)::QAB1(B),XP(b)
    - P(d);OGATEB,XP(E)::QAR2(B)
    - S(e);N_GUARD::QAR2(B),XS(e)
    - P(a);OGATE,P_PINP(E)::QAB1(B),XP(b)
    - P(a);OGATE::QAB1(B),XP(b)
    - P(b);::QAB1(B),XP(a)
    - P(b);OGATE::R1(C)
    - S(e);N_GUARD::QAR2(B)
  - Refutation
    - P(a);
- Try
  - S(D);
  - Threat
    - S(D)
  - Vars
    - P(a);OGATE,XS(A)::QAB1(B),XP(b)
    - S(e);N_GUARD::QAR2(B),XS(e)
    - P(b);::QAB1(B),XP(a)
    - S(e);N_GUARD::QAR2(B)
  - Refutation
    - P(d);XP(E)
Actual
- S(D);
- Threat
  - S(D)
- Vars
  - P(a);OGATE,XS(A)::QAB1(B),XP(b)
  - P(d);OGATEB,XP(E)::QAR2(B)
  - S(e);N_GUARD::QAR2(B),XS(e)
  - P(b);::QAB1(B),XP(a)
  - P(b);OGATE::R1(C)

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).