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Problem Display

PID: 16199 (8/8/8/Q3pp2/4nNR1/4rkPB/4b2K/1N4B1 w - - 0 1)

Onkoud, Abdelaziz

StrateGems, 2000

8/8/8/Q3pp2/4nNR1/4rkPB/4b2K/1N4B1

#2

8 + 6

SOLUTION

SOUND
Sets
- 1...Sd2
  - 2.Sxd2#
- 1...Sf2
  - 2.Sd2#
- 1...Sc3
  - 2.Sd2#
- 1...Sxg3
  - 2.Sd2#
- 1...Sc5
  - 2.Sd2#
- 1...Sg5
  - 2.Sd2#
- 1...Sd6
  - 2.Sd2#
- 1...Sf6
  - 2.Sd2#
- 1...exf4
  - 2.Rxf4#
- 1...fxg4
  - 2.Bg2#
Tries
- 1.Qd2?
  - threat
    - 2.Qxe3#
  - 1...Sxd2
    - 2.Sxd2#
  - 1...exf4
    - 2.Rxf4#
  - 1...Ra3
    - 2.Qxe2#
  - 1...Rb3
    - 2.Qxe2#
  - 1...Rc3
    - 2.Qxe2#
  - 1...Rd3
    - 2.Qxe2#
  - 1...Sf2!
- 1.Qa2?
  - 1...Sxg3
    - 2.Sd2#
  - 1...exf4
    - 2.Rxf4#
  - 1...fxg4
    - 2.Bg2#
  - 1...Sd2
    - 2.Sxd2#
  - 1...Sf2
    - 2.Sd2#
  - 1...Sc3
    - 2.Sd2#
  - 1...Sc5
    - 2.Sd2#
  - 1...Sg5
    - 2.Sd2#
  - 1...Sd6
    - 2.Sd2#
  - 1...Sf6
    - 2.Sd2#
  - 1...Ra3
    - 2.Qxe2#
  - 1...Rb3
    - 2.Qxe2#
  - 1...Rc3
    - 2.Qxe2#
  - 1...Rd3
    - 2.Qxe2#
  - 1...Bd1
    - 2.Qg2#
  - 1...Bd3
    - 2.Qg2#
  - 1...Bc4
    - 2.Qg2#
  - 1...Bb5
    - 2.Qg2#
  - 1...Ba6
    - 2.Qg2#
  - 1...Bf1!
Keys
- 1.Qe1!
  - 1...Sxg3
    - 2.Sd2#
  - 1...exf4
    - 2.Rxf4#
  - 1...fxg4
    - 2.Bg2#
  - 1...Sd2
    - 2.Sxd2#
  - 1...Sf2
    - 2.Sd2#
  - 1...Sc3
    - 2.Sd2#
  - 1...Sc5
    - 2.Sd2#
  - 1...Sg5
    - 2.Sd2#
  - 1...Sd6
    - 2.Sd2#
  - 1...Sf6
    - 2.Sd2#
  - 1...Bf1
    - 2.Qxe3#
  - 1...Ra3
    - 2.Qxe2#
  - 1...Rb3
    - 2.Qxe2#
  - 1...Rc3
    - 2.Qxe2#
  - 1...Rd3
    - 2.Qxe2#
  - 1...Bd1
    - 2.Qxe3#
  - 1...Bd3
    - 2.Qxe3#
  - 1...Bc4
    - 2.Qxe3#
  - 1...Bb5
    - 2.Qxe3#
  - 1...Ba6
    - 2.Qxe3#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 10
- REMOVED MATES = 0
Sets
- S(d);N_GUARD::S(A),XS(d)
- S(d);N_GUARD::S(A)
- S(d);N_GUARD,XP(D)::S(A)
- P(e);OGATE,XS(F)::R1(G),XP(e)
- P(f);SBLOCK,XR(G)::B(E)
Tries
- Try
  - Q(H);
  - Threat
    - QAR1(H),XR(b)
  - Vars
    - S(d);XQ(H)::S(A),XS(d)
    - P(e);OGATE,XS(F)::R1(G),XP(e)
    - R(b);N_GUARD::QAB1(H),XB(a)
  - Refutation
    - S(d);
- Try
  - Q(H);
  - Vars
    - S(d);N_GUARD,XP(D)::S(A)
    - P(e);OGATE,XS(F)::R1(G),XP(e)
    - P(f);SBLOCK,XR(G)::B(E)
    - S(d);N_GUARD::S(A),XS(d)
    - S(d);N_GUARD::S(A)
    - R(b);N_GUARD::QAB1(H),XB(a)
    - B(a);OGATE::QAB1(H)
  - Refutation
    - B(a);
Actual
- Q(H);
- Vars
  - S(d);N_GUARD,XP(D)::S(A)
  - P(e);OGATE,XS(F)::R1(G),XP(e)
  - P(f);SBLOCK,XR(G)::B(E)
  - S(d);N_GUARD::S(A),XS(d)
  - S(d);N_GUARD::S(A)
  - B(a);OGATE::QAR1(H),XR(b)
  - R(b);N_GUARD::QAB1(H),XB(a)

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).