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Problem Display

PID: 215323 (8/3n4/8/1p1Q3p/1p1NN2K/1P1k4/3P1P1p/3R2br w - - 0 1)

Gross, J

Funkschach, 1926

8/3n4/8/1p1Q3p/1p1NN2K/1P1k4/3P1P1p/3R2br

#2

8 + 8

15148	Sadier Collection	2020

SOLUTION

SOUND
Sets
- 1...Bxf2+
  - 2.Sxf2#
- 1...Sc5
  - 2.Sxc5#
- 1...Se5
  - 2.Sc5#
- 1...Sb6
  - 2.Sc5#
- 1...Sf6
  - 2.Sc5#
- 1...Sb8
  - 2.Sc5#
- 1...Sf8
  - 2.Sc5#
Tries
- 1.Kg3?
  - 1...Bxf2+
    - 2.Sxf2#
  - 1...Sc5
    - 2.Sxc5#
  - 1...Se5
    - 2.Sc5#
  - 1...Sb6
    - 2.Sc5#
  - 1...Sf6
    - 2.Sc5#
  - 1...Sb8
    - 2.Sc5#
  - 1...Sf8
    - 2.Sc5#
  - 1...h4+!
- 1.Kh3?
  - 1...Bxf2
    - 2.Sxf2#
  - 1...Sc5
    - 2.Sxc5#
  - 1...Se5
    - 2.Sc5#
  - 1...Sb6
    - 2.Sc5#
  - 1...Sf6
    - 2.Sc5#
  - 1...Sb8
    - 2.Sc5#
  - 1...Sf8
    - 2.Sc5#
  - 1...h4!
- 1.Kg5?
  - 1...Bxf2
    - 2.Sxf2#
  - 1...Sc5
    - 2.Sxc5#
  - 1...Se5
    - 2.Sc5#
  - 1...Sb6
    - 2.Sc5#
  - 1...Sf6
    - 2.Sc5#
  - 1...Sb8
    - 2.Sc5#
  - 1...Sf8
    - 2.Sc5#
  - 1...h4!
- 1.Kxh5?
  - 1...Bxf2
    - 2.Sxf2#
  - 1...Sc5
    - 2.Sxc5#
  - 1...Se5
    - 2.Sc5#
  - 1...Sb6
    - 2.Sc5#
  - 1...Sb8
    - 2.Sc5#
  - 1...Sf8
    - 2.Sc5#
  - 1...Sf6+!
- 1.Qe5?
  - 1...Bxf2+
    - 2.Sxf2#
  - 1...Sc5
    - 2.Sxc5#
  - 1...Sb6
    - 2.Sc5#
  - 1...Sf6
    - 2.Sc5#
  - 1...Sb8
    - 2.Sc5#
  - 1...Sf8
    - 2.Sc5#
  - 1...Sxe5!
- 1.Qxd7?
  - threat
    - 2.Sc5#
  - 1...Bxf2+
    - 2.Sxf2#
  - 1...Kxe4!
Keys
- 1.Qd6!
  - 1...Bxf2+
    - 2.Sxf2#
  - 1...Kxe4
    - 2.d3#
  - 1...Sc5
    - 2.Sxc5#
  - 1...Se5
    - 2.Sc5#
  - 1...Sb6
    - 2.Sc5#
  - 1...Sf6
    - 2.Sc5#
  - 1...Sb8
    - 2.Sc5#
  - 1...Sf8
    - 2.Sc5#

FEATURES

Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- B(a);CHECK,XP(C)::S(F),XB(a)
- S(h);N_GUARD::S(F),XS(h)
- S(h);N_GUARD::S(F)
Tries
- Try
  - K(G);S_FLIGHT
  - Vars
    - B(a);CHECK,XP(C)::S(F),XB(a)
    - S(h);N_GUARD::S(F),XS(h)
    - S(h);N_GUARD::S(F)
  - Refutation
    - P(g);CHECK
- Try
  - K(G);P-FLIGHT
  - Vars
    - B(a);XP(C)::S(F),XB(a)
    - S(h);N_GUARD::S(F),XS(h)
    - S(h);N_GUARD::S(F)
  - Refutation
    - P(g);
- Try
  - K(G);S_FLIGHT
  - Vars
    - B(a);XP(C)::S(F),XB(a)
    - S(h);N_GUARD::S(F),XS(h)
    - S(h);N_GUARD::S(F)
  - Refutation
    - P(g);
- Try
  - K(G);P-FLIGHT,XP(g)
  - Vars
    - B(a);XP(C)::S(F),XB(a)
    - S(h);N_GUARD::S(F),XS(h)
    - S(h);N_GUARD::S(F)
  - Refutation
    - S(h);CHECK
- Try
  - Q(H);
  - Vars
    - B(a);CHECK,XP(C)::S(F),XB(a)
    - S(h);N_GUARD::S(F),XS(h)
    - S(h);N_GUARD::S(F)
  - Refutation
    - S(h);XQ(H)
- Try
  - Q(H);XS(h)
  - Threat
    - S(F)
  - Vars
    - B(a);CHECK,XP(C)::S(F),XB(a)
  - Refutation
    - K(d);S_FLIGHT,XS(F)
Actual
- Q(H);
- Vars
  - B(a);CHECK,XP(C)::S(F),XB(a)
  - K(d);OGATE,S_FLIGHT,XS(F)::P(B)
  - S(h);N_GUARD::S(F),XS(h)
  - S(h);N_GUARD::S(F)

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).