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Problem Display

PID: 11520 (8/8/p2pN3/Pn6/pQ2N3/p1Pk1B1n/Pp1P4/1K6 w - - 0 1)

Sachsel, Robert

Chess, 1939

8/8/p2pN3/Pn6/pQ2N3/p1Pk1B1n/Pp1P4/1K6

#2

9 + 8

SOLUTION

SOUND
Sets
- 1...Sg1
  - 2.Sf4#
- 1...Sf2
  - 2.Sf4#
- 1...Sf4
  - 2.Sxf4#
- 1...Sg5
  - 2.Sf4#
- 1...Sxc3+
  - 2.Qxc3#
- 1...Sd4
  - 2.Qxd4#
- 1...Sa7
  - 2.Qd4#
- 1...Sc7
  - 2.Qd4#
- 1...d5
  - 2.S6c5#
Tries
- 1.Bd1?
  - 1...Sd4
    - 2.Qxd4#
  - 1...Sg1
    - 2.Sf4#
  - 1...Sf2
    - 2.Sf4#
  - 1...Sf4
    - 2.Sxf4#
  - 1...Sg5
    - 2.Sf4#
  - 1...Sa7
    - 2.Qd4#
  - 1...Sc7
    - 2.Qd4#
  - 1...d5
    - 2.S6c5#
  - 1...Sxc3+!
- 1.Bg4?
  - 1...Sd4
    - 2.Qxd4#
  - 1...Sg1
    - 2.Sf4#
  - 1...Sf2
    - 2.Sf4#
  - 1...Sf4
    - 2.Sxf4#
  - 1...Sg5
    - 2.Sf4#
  - 1...Sa7
    - 2.Qd4#
  - 1...Sc7
    - 2.Qd4#
  - 1...d5
    - 2.S6c5#
  - 1...Sxc3+!
- 1.Bh5?
  - 1...Sd4
    - 2.Qxd4#
  - 1...Sg1
    - 2.Sf4#
  - 1...Sf2
    - 2.Sf4#
  - 1...Sf4
    - 2.Sxf4#
  - 1...Sg5
    - 2.Sf4#
  - 1...Sa7
    - 2.Qd4#
  - 1...Sc7
    - 2.Qd4#
  - 1...d5
    - 2.S6c5#
  - 1...Sxc3+!
- 1.Qxd6+?
  - 1...Kc4
    - 2.Be2#
    - 2.d3#
  - 1...Sd4
    - 2.Qxd4#
  - 1...Sxd6!
- 1.Qxa4?
  - 1...Sg1
    - 2.Sf4#
  - 1...Sf2
    - 2.Sf4#
  - 1...Sf4
    - 2.Sxf4#
  - 1...Sg5
    - 2.Sf4#
  - 1...Sd4
    - 2.Qxd4#
  - 1...Sa7
    - 2.Qd4#
  - 1...Sc7
    - 2.Qd4#
  - 1...d5
    - 2.S6c5#
  - 1...Sxc3+!
Keys
- 1.c4!
  - 1...Sc3+
    - 2.Qxc3#
  - 1...Sg1
    - 2.Sf2#
  - 1...Sf2
    - 2.Sxf2#
  - 1...Sf4
    - 2.Sf2#
  - 1...Sg5
    - 2.Sf2#
  - 1...Sd4
    - 2.Qc3#
  - 1...Sa7
    - 2.Qc3#
  - 1...Sc7
    - 2.Qc3#
  - 1...d5
    - 2.S4c5#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);CHECK,OGATE,XP(D)::QAR1(F),XS(f)
- S(f);N_GUARD::QAR1(F),XS(f)
- S(f);N_GUARD::QAR1(F)
- P(h);N_GUARD::S(I)
Tries
- Try
  - B(E);
  - Vars
    - S(f);N_GUARD::QAR1(F),XS(f)
    - S(d);N_GUARD::S(I)
    - S(d);N_GUARD::S(I),XS(d)
    - S(f);N_GUARD::QAR1(F)
    - P(h);N_GUARD::S(I)
  - Refutation
    - S(f);CHECK,XP(D)
- Try
  - B(E);
  - Vars
    - S(f);N_GUARD::QAR1(F),XS(f)
    - S(d);N_GUARD::S(I)
    - S(d);N_GUARD::S(I),XS(d)
    - S(f);N_GUARD::QAR1(F)
    - P(h);N_GUARD::S(I)
  - Refutation
    - S(f);CHECK,XP(D)
- Try
  - B(E);
  - Vars
    - S(f);N_GUARD::QAR1(F),XS(f)
    - S(d);N_GUARD::S(I)
    - S(d);N_GUARD::S(I),XS(d)
    - S(f);N_GUARD::QAR1(F)
    - P(h);N_GUARD::S(I)
  - Refutation
    - S(f);CHECK,XP(D)
- Try
  - Q(F);CHECK,XP(h)
  - Vars
    - S(f);N_GUARD,P_SPINS(f)::QAR1(F),XS(f)
  - Refutation
    - S(f);XQ(F)
- Try
  - Q(F);XP(e)
  - Vars
    - S(d);N_GUARD::S(I)
    - S(d);N_GUARD::S(I),XS(d)
    - S(f);N_GUARD::QAR1(F),XS(f)
    - S(f);N_GUARD::QAR1(F)
    - P(h);N_GUARD::S(I)
  - Refutation
    - S(f);CHECK,XP(D)
Actual
- P(D);
- Vars
  - S(f);CHECK,N_GUARD::QAR1(F),XS(f)
  - S(d);N_GUARD::S(G)
  - S(d);N_GUARD::S(G),XS(d)
  - S(f);N_GUARD::QAR1(F)
  - P(h);N_GUARD::S(G)

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).