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Problem Display

PID: 274384 (b7/1n1N1p2/5P2/1p3kpK/1R2N2b/p3P1BP/B7/8 w - - 0 1)

Laaksonen, Hellmuth

Probleemblad, 1953

b7/1n1N1p2/5P2/1p3kpK/1R2N2b/p3P1BP/B7/8

#2

9 + 8

SOLUTION

SOUND
Sets
- 1...Bxg3
  - 2.Sxg3#
- 1...Sa5
  - 2.Sd6#
- 1...Sc5
  - 2.Sd6#
- 1...Sd6
  - 2.Sxd6#
- 1...Sd8
  - 2.Sd6#
- 1...g4
  - 2.hxg4#
Tries
- 1.Kh6?
  - 1...Bxg3
    - 2.Sxg3#
  - 1...Sa5
    - 2.Sd6#
  - 1...Sc5
    - 2.Sd6#
  - 1...Sd6
    - 2.Sxd6#
  - 1...Sd8
    - 2.Sd6#
  - 1...g4!
- 1.Bb3?
  - 1...Bxg3
    - 2.Sxg3#
  - 1...Sa5
    - 2.Sd6#
  - 1...Sc5
    - 2.Sd6#
  - 1...Sd6
    - 2.Sxd6#
  - 1...Sd8
    - 2.Sd6#
  - 1...g4
    - 2.hxg4#
  - 1...a2!
- 1.Bd5?
  - 1...Bxg3
    - 2.Sxg3#
  - 1...Sa5
    - 2.Sd6#
  - 1...Sc5
    - 2.Sd6#
  - 1...Sd6
    - 2.Sxd6#
  - 1...Sd8
    - 2.Sd6#
  - 1...g4
    - 2.hxg4#
  - 1...a2!
- 1.Bxf7?
  - 1...Bxg3
    - 2.Sxg3#
  - 1...Sa5
    - 2.Sd6#
  - 1...Sc5
    - 2.Sd6#
  - 1...Sd6
    - 2.Sxd6#
  - 1...Sd8
    - 2.Sd6#
  - 1...g4
    - 2.hxg4#
  - 1...a2!
- 1.Bf2?
  - 1...Sa5
    - 2.Sd6#
  - 1...Bg3
    - 2.Sxg3#
  - 1...Sc5
    - 2.Sd6#
  - 1...Sd6
    - 2.Sxd6#
  - 1...Sd8
    - 2.Sd6#
  - 1...g4
    - 2.hxg4#
  - 1...Bxf2!
- 1.Rd4?
  - 1...Bxg3
    - 2.Sxg3#
  - 1...Sa5
    - 2.Sd6#
  - 1...Sc5
    - 2.Sd6#
  - 1...Sd6
    - 2.Sxd6#
  - 1...Sd8
    - 2.Sd6#
  - 1...g4
    - 2.hxg4#
  - 1...b4!
- 1.Rxb5+?
  - 1...Sc5
    - 2.Sd6#
  - 1...Kxe4!
Keys
- 1.Sxg5!
  - threat
    - 2.Bb1#
    - 2.Rf4#
    - 2.e4#
  - 1...Bxg3
    - 2.Bb1#
  - 1...Bxg5
    - 2.e4#
  - 1...Sa5
    - 2.Rf4#
  - 1...Sc5
    - 2.Rf4#
  - 1...Sd6
    - 2.Rf4#
  - 1...Sd8
    - 2.Rf4#

FEATURES

Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 5
- ADDED MATES = 1
- REMOVED MATES = 1
Sets
- B(b);XB(C)::S(F),XB(b)
- S(f);N_GUARD::S(F)
- S(f);N_GUARD::S(F),XS(f)
- P(e);OGATE::P(D),XP(e)
Tries
- Try
  - K(G);P-FLIGHT
  - Vars
    - B(b);XB(C)::S(F),XB(b)
    - S(f);N_GUARD::S(F)
    - S(f);N_GUARD::S(F),XS(f)
  - Refutation
    - P(e);
- Try
  - B(A);
  - Vars
    - B(b);XB(C)::S(F),XB(b)
    - S(f);N_GUARD::S(F)
    - S(f);N_GUARD::S(F),XS(f)
    - P(e);OGATE::P(D),XP(e)
  - Refutation
    - P(a);
- Try
  - B(A);
  - Vars
    - B(b);XB(C)::S(F),XB(b)
    - S(f);N_GUARD::S(F)
    - S(f);N_GUARD::S(F),XS(f)
    - P(e);OGATE::P(D),XP(e)
  - Refutation
    - P(a);
- Try
  - B(A);XP(g)
  - Vars
    - B(b);XB(C)::S(F),XB(b)
    - S(f);N_GUARD::S(F)
    - S(f);N_GUARD::S(F),XS(f)
    - P(e);OGATE::P(D),XP(e)
  - Refutation
    - P(a);
- Try
  - B(C);
  - Vars
    - S(f);N_GUARD::S(F)
    - B(b);N_GUARD::S(F),XB(b)
    - S(f);N_GUARD::S(F),XS(f)
    - P(e);OGATE::P(D),XP(e)
  - Refutation
    - B(b);XB(C)
- Try
  - R(E);
  - Vars
    - B(b);XB(C)::S(F),XB(b)
    - S(f);N_GUARD::S(F)
    - S(f);N_GUARD::S(F),XS(f)
    - P(e);OGATE::P(D),XP(e)
  - Refutation
    - P(c);
- Try
  - R(E);CHECK,XP(c)
  - Vars
    - S(f);P_SPINS(f)::S(F)
  - Refutation
    - K(d);S_FLIGHT,XS(F)
Actual
- S(F);XP(e)
- Threat
  - DUALS(3)
- Vars
  - B(b);XB(C)::B(A)
  - B(b);XS(F)::P(B)
  - S(f);::R1(E)

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).