Meson Chess Problem Database

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Problem Display

PID: 153639 (8/4p3/p2nQ1p1/B5P1/b2pPP2/3k1P2/2rN1K2/1B6 w - - 0 1)

Diez Barroso, Victor M

Good Companions (April), 1916

8/4p3/p2nQ1p1/B5P1/b2pPP2/3k1P2/2rN1K2/1B6

#2

9 + 8

SOLUTION

SOUND
Sets
- 1...Bb3
  - 2.Qxb3#
- 1...Bb5
  - 2.Qb3#
- 1...Bc6
  - 2.Qb3#
- 1...Bd7
  - 2.Qb3#
- 1...Be8
  - 2.Qb3#
- 1...Sc4
  - 2.Qxc4#
- 1...Sxe4+
  - 2.Qxe4#
- 1...Sb5
  - 2.Qc4#
- 1...Sf5
  - 2.Qc4#
- 1...Sb7
  - 2.Qc4#
- 1...Sf7
  - 2.Qc4#
- 1...Sc8
  - 2.Qc4#
- 1...Se8
  - 2.Qc4#
Tries
- 1.Bb4?
  - 1...Sxe4+
    - 2.Qxe4#
  - 1...Sc4
    - 2.Qxc4#
  - 1...Bb3
    - 2.Qxb3#
  - 1...Bb5
    - 2.Qb3#
  - 1...Bc6
    - 2.Qb3#
  - 1...Bd7
    - 2.Qb3#
  - 1...Be8
    - 2.Qb3#
  - 1...Sb5
    - 2.Qc4#
  - 1...Sf5
    - 2.Qc4#
  - 1...Sb7
    - 2.Qc4#
  - 1...Sf7
    - 2.Qc4#
  - 1...Sc8
    - 2.Qc4#
  - 1...Se8
    - 2.Qc4#
  - 1...a5!
- 1.e5?
  - 1...Sc4
    - 2.Qxc4#
    - 2.Qxg6#
  - 1...Bb3
    - 2.Qxb3#
  - 1...Bb5
    - 2.Qb3#
  - 1...Bc6
    - 2.Qb3#
  - 1...Bd7
    - 2.Qb3#
  - 1...Be8
    - 2.Qb3#
  - 1...Sb5
    - 2.Qc4#
    - 2.Qxg6#
  - 1...Sf5
    - 2.Qc4#
  - 1...Sb7
    - 2.Qc4#
    - 2.Qxg6#
  - 1...Sf7
    - 2.Qc4#
    - 2.Qxg6#
  - 1...Sc8
    - 2.Qc4#
    - 2.Qxg6#
  - 1...Se8
    - 2.Qc4#
    - 2.Qxg6#
  - 1...Se4+!
- 1.f5?
  - 1...Sxe4+
    - 2.Qxe4#
  - 1...Sxf5
    - 2.Qc4#
  - 1...Sc4
    - 2.Qxc4#
  - 1...Bb3
    - 2.Qxb3#
  - 1...Bb5
    - 2.Qb3#
  - 1...Bc6
    - 2.Qb3#
  - 1...Bd7
    - 2.Qb3#
  - 1...Be8
    - 2.Qb3#
  - 1...Sb5
    - 2.Qc4#
  - 1...Sb7
    - 2.Qc4#
  - 1...Sf7
    - 2.Qc4#
  - 1...Sc8
    - 2.Qc4#
  - 1...Se8
    - 2.Qc4#
  - 1...gxf5!
Keys
- 1.Qh3!
  - threat
    - 2.Qf1#
  - 1...Sxe4+
    - 2.fxe4#

FEATURES

Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 12
Sets
- B(c);N_GUARD::QAR2(I),XB(c)
- B(c);N_GUARD::QAR2(I)
- S(f);N_GUARD::QAB1(I),XS(f)
- S(f);CHECK,OGATE,XP(E)::QAB1(I),XS(f)
- S(f);N_GUARD::QAB1(I)
Tries
- Try
  - B(G);
  - Vars
    - S(f);CHECK,OGATE,XP(E)::QAB1(I),XS(f)
    - S(f);N_GUARD::QAB1(I),XS(f)
    - B(c);N_GUARD::QAR2(I),XB(c)
    - B(c);N_GUARD::QAR2(I)
    - S(f);N_GUARD::QAB1(I)
  - Refutation
    - P(e);
- Try
  - P(E);
  - Vars
    - B(c);N_GUARD::QAR2(I),XB(c)
    - B(c);N_GUARD::QAR2(I)
    - S(f);N_GUARD::QAB1(I)
  - Refutation
    - S(f);CHECK
- Try
  - P(F);
  - Vars
    - S(f);CHECK,OGATE,XP(E)::QAB1(I),XS(f)
    - S(f);N_GUARD,XP(F)::QAB1(I)
    - S(f);N_GUARD::QAB1(I),XS(f)
    - B(c);N_GUARD::QAR2(I),XB(c)
    - B(c);N_GUARD::QAR2(I)
    - S(f);N_GUARD::QAB1(I)
  - Refutation
    - P(g);XP(F)
Actual
- Q(I);
- Threat
  - QAB(I)
- Vars
  - S(f);CHECK,OGATE,XP(E)::QAR(I)+P(D),XS(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).