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Problem Display

PID: 206520 (8/5p2/3p1p2/4kP1N/2Q3PK/1p2r2p/1P1N3P/8 w - - 0 1)

Harcz, Karoly

Uj Nemezdek, 1925

8/5p2/3p1p2/4kP1N/2Q3PK/1p2r2p/1P1N3P/8

#2

8 + 7

6490	yacpdb	2020

SOLUTION

SOUND
Sets
- 1...Re1
  - 2.Sf3#
- 1...Re2
  - 2.Sf3#
- 1...Rc3
  - 2.Qe4#
- 1...Rd3
  - 2.Qe4#
- 1...Rf3
  - 2.Sxf3#
  - 2.Qe4#
- 1...Rg3
  - 2.Qe4#
- 1...Re4
  - 2.Sf3#
  - 2.Qxe4#
- 1...d5
  - 2.Qf4#
Tries
- 1.Sg3?
  - 1...Rxg3
    - 2.Qe4#
  - 1...Re4
    - 2.Qxe4#
  - 1...Re1
    - 2.Sf3#
  - 1...Re2
    - 2.Sf3#
  - 1...Rc3
    - 2.Qe4#
  - 1...Rd3
    - 2.Qe4#
  - 1...Rf3
    - 2.Sxf3#
    - 2.Qe4#
  - 1...d5!
- 1.Sf4?
  - 1...Re4
    - 2.Sd3#
    - 2.Qxe4#
  - 1...Re1
    - 2.Sf3#
    - 2.Sd3#
  - 1...Re2
    - 2.Sf3#
    - 2.Sd3#
  - 1...Rc3
    - 2.Qe4#
  - 1...Rd3
    - 2.Sxd3#
    - 2.Qe4#
  - 1...Rf3
    - 2.Sxf3#
    - 2.Qe4#
  - 1...Rg3
    - 2.Qe4#
  - 1...d5!
- 1.Sg7?
  - 1...Re4
    - 2.Qxe4#
  - 1...Re1
    - 2.Sf3#
  - 1...Re2
    - 2.Sf3#
  - 1...Rc3
    - 2.Qe4#
  - 1...Rd3
    - 2.Qe4#
  - 1...Rf3
    - 2.Sxf3#
    - 2.Qe4#
  - 1...Rg3
    - 2.Qe4#
  - 1...d5!
- 1.Qe6+?
  - 1...Kd4
    - 2.Qxd6#
  - 1...fxe6!
- 1.Qc3+?
  - 1...Kd5
    - 2.Sf4#
    - 2.Sxf6#
  - 1...Rxc3!
Keys
- 1.Qc6!
  - 1...Kd4
    - 2.Qxd6#
  - 1...Re1
    - 2.Sf3#
  - 1...Re2
    - 2.Sf3#
  - 1...Rc3
    - 2.Qe4#
  - 1...Rd3
    - 2.Qe4#
  - 1...Rf3
    - 2.Sxf3#
    - 2.Qe4#
  - 1...Rg3
    - 2.Qe4#
  - 1...Re4
    - 2.Sf3#
    - 2.Qxe4#
  - 1...d5
    - 2.Qxf6#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- R(b);N_GUARD::S(B)
- R(b);N_GUARD::QAR1(D)
- P(e);SBLOCK::QAB1(D)
Tries
- Try
  - S(H);
  - Vars
    - R(b);N_GUARD,XS(H)::QAR1(D)
    - R(b);N_GUARD,P_PINP(E)::QAR1(D),XR(b)
    - R(b);N_GUARD::S(B)
    - R(b);N_GUARD::QAR1(D)
  - Refutation
    - P(e);
- Try
  - S(H);
  - Vars
    - R(b);N_GUARD::QAR1(D)
  - Refutation
    - P(e);
- Try
  - S(H);
  - Vars
    - R(b);N_GUARD,P_PINP(E)::QAR1(D),XR(b)
    - R(b);N_GUARD::S(B)
    - R(b);N_GUARD::QAR1(D)
  - Refutation
    - P(e);
- Try
  - Q(D);CHECK
  - Vars
    - K(d);S_FLIGHT::QAR2(D),XP(e)
  - Refutation
    - P(g);XQ(D)
- Try
  - Q(D);CHECK
  - Refutation
    - R(b);XQ(D)
Actual
- Q(D);
- Vars
  - K(d);S_FLIGHT::QAR2(D),XP(e)
  - R(b);N_GUARD::S(B)
  - R(b);N_GUARD::QAR1(D)
  - P(e);OGATE,SBLOCK::QAB1(D),XP(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).