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Problem Display

PID: 7666 (5q2/pQbb4/rP1pp3/pkN1p3/N3p3/KP2P2B/8/8 w - - 0 1)

Groeneveld, Cornelis

1st HM., Scacco!, 1992

5q2/pQbb4/rP1pp3/pkN1p3/N3p3/KP2P2B/8/8

#2

8 + 11

SOLUTION

SOUND
Sets
- 1...Qh6
  - 2.Bf1#
- 1...Qe7
  - 2.Bf1#
- 1...Qg7
  - 2.Bf1#
- 1...Qf1
  - 2.Bxf1#
- 1...Qa8
  - 2.Bf1#
- 1...Qb8
  - 2.Bf1#
- 1...Qc8
  - 2.Bf1#
- 1...Qd8
  - 2.Bf1#
- 1...Qe8
  - 2.Bf1#
- 1...Qg8
  - 2.Bf1#
- 1...Qh8
  - 2.Bf1#
- 1...Bxb6
  - 2.Qxd7#
- 1...Bb8
  - 2.Qxd7#
- 1...Bd8
  - 2.Qxd7#
- 1...Bc6
  - 2.Qxa6#
- 1...dxc5
  - 2.Sc3#
Tries
- 1.Sxa6?
  - threat
    - 2.Sc3#
    - 2.Sxc7#
    - 2.bxc7#
  - 1...Bxb6
    - 2.Sc3#
    - 2.Sc7#
  - 1...axb6
    - 2.Sc3#
    - 2.Sxc7#
  - 1...Qa8
    - 2.Sc3#
    - 2.Sxc7#
    - 2.Bf1#
  - 1...Qb8
    - 2.Sc3#
    - 2.Bf1#
  - 1...Qc8
    - 2.Sc3#
    - 2.Bf1#
  - 1...Qd8
    - 2.Sc3#
    - 2.Bf1#
    - 2.bxc7#
  - 1...Bb8
    - 2.Sc3#
    - 2.bxa7#
  - 1...Bd8
    - 2.Sc3#
  - 1...Bc6
    - 2.Sc3#
    - 2.Sxc7#
  - 1...Bc8
    - 2.Sc3#
    - 2.Sxc7#
  - 1...d5+!
- 1.Qxc7?
  - threat
    - 2.Sc3#
    - 2.Qxd7#
  - 1...Rxb6
    - 2.Sc3#
  - 1...Qe7
    - 2.Sc3#
    - 2.Bf1#
  - 1...Qg7
    - 2.Sc3#
    - 2.Bf1#
  - 1...Qf7
    - 2.Sc3#
  - 1...Qa8
    - 2.Sc3#
    - 2.Bf1#
  - 1...Qc8
    - 2.Sc3#
    - 2.Bf1#
  - 1...Qd8
    - 2.Sc3#
    - 2.Bf1#
  - 1...Qe8
    - 2.Sc3#
    - 2.Bf1#
  - 1...Bc8
    - 2.Sc3#
  - 1...Be8
    - 2.Sc3#
  - 1...Bc6!
- 1.bxa7+?
  - 1...Bb6
    - 2.Qxd7#
  - 1...Rb6!
Keys
- 1.Qd5!
  - threat
    - 2.Sxe6#
  - 1...Rxb6
    - 2.Sc3#
  - 1...Bxb6
    - 2.Sc3#
  - 1...dxc5
    - 2.Qxd7#
  - 1...exd5
    - 2.Bxd7#
  - 1...Qa8
    - 2.Bf1#
  - 1...Bc6
    - 2.Qc4#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 12
Sets
- Q(k);N_GUARD::B(D)
- Q(k);N_GUARD::B(D),XQ(k)
- B(i);OGATE,P_SPINB(i),XP(G)::QAB(H),XB(j)
- B(i);OGATE::QAB(H),XB(j)
- B(j);SBLOCK::QAB1(H),XR(e)
- P(f);SBLOCK,XS(F)::S(E)
Tries
- Try
  - S(F);XR(e)
  - Threat
    - DUALS(3)
  - Vars
    - B(i);::S(E)
  - Refutation
    - P(f);CHECK
- Try
  - Q(H);XB(i)
  - Threat
    - DUALS(2)
  - Vars
    - R(e);XP(G)::S(E)
    - Q(k);::S(E)
    - B(j);::S(E)
  - Refutation
    - B(j);
- Try
  - P(G);CHECK,XP(h)
  - Vars
    - B(i);OGATE,P_SPINB(i)::QAB(H),XB(j)
  - Refutation
    - R(e);P_SPINR(e)
Actual
- Q(H);
- Threat
  - QAR(H)+S(F),XP(g)
- Vars
  - R(e);SBLOCK,XP(G)::S(E)
  - B(i);SBLOCK,XP(G)::S(E)
  - P(f);OGATE,P_SPINP(f),XS(F)::QAB(H),XB(j)
  - P(g);OGATE,XQ(H)::B(D),XB(j)
  - Q(k);N_GUARD::B(D)
  - B(j);SBLOCK::QAB1(H)

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).