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Problem Display

PID: 99389 (8/8/8/4p3/2K2n2/4k3/2Q2R2/8 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1926

8/8/8/4p3/2K2n2/4k3/2Q2R2/8

#2

3 + 3

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Se2
  - 2.Qxe2#
- 1...Sg2
  - 2.Qe2#
- 1...Sd3
  - 2.Qe2#
- 1...Sh3
  - 2.Qe2#
- 1...Sd5
  - 2.Qe2#
- 1...Sh5
  - 2.Qe2#
- 1...Se6
  - 2.Qe2#
- 1...Sg6
  - 2.Qe2#
- 1...e4
  - 2.Qd2#
Tries
- 1.Kc3?
  - 1...Se2+
    - 2.Qxe2#
  - 1...Sd3
    - 2.Qe2#
  - 1...Sg2
    - 2.Qe2#
  - 1...Sh3
    - 2.Qe2#
  - 1...Sh5
    - 2.Qe2#
  - 1...Se6
    - 2.Qe2#
  - 1...Sg6
    - 2.Qe2#
  - 1...e4
    - 2.Qd2#
  - 1...Sd5+!
- 1.Qa2?
  - 1...Se2
    - 2.Qxe2#
  - 1...Sg2
    - 2.Qe2#
  - 1...Sd3
    - 2.Qe2#
  - 1...Sh3
    - 2.Qe2#
  - 1...Sd5
    - 2.Qe2#
  - 1...Sh5
    - 2.Qe2#
  - 1...Se6
    - 2.Qe2#
  - 1...Sg6
    - 2.Qe2#
  - 1...e4
    - 2.Qd2#
    - 2.Qa7#
  - 1...Ke4!
- 1.Qb2?
  - 1...Se2
    - 2.Qxe2#
  - 1...Sg2
    - 2.Qe2#
  - 1...Sd3
    - 2.Qe2#
  - 1...Sh3
    - 2.Qe2#
  - 1...Sd5
    - 2.Qe2#
  - 1...Sh5
    - 2.Qe2#
  - 1...Se6
    - 2.Qe2#
  - 1...Sg6
    - 2.Qe2#
  - 1...e4
    - 2.Qd4#
    - 2.Qd2#
    - 2.Qb6#
  - 1...Ke4!
Keys
- 1.Rf1!
  - 1...Sd3
    - 2.Qxd3#
  - 1...Se2
    - 2.Qd3#
  - 1...Sg2
    - 2.Qd3#
  - 1...Sh3
    - 2.Qd3#
  - 1...Sd5
    - 2.Qd3#
  - 1...Sh5
    - 2.Qd3#
  - 1...Se6
    - 2.Qd3#
  - 1...Sg6
    - 2.Qd3#
  - 1...e4
    - 2.Qf2#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 9
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- S(b);N_GUARD::QAR1(A),XS(b)
- S(b);N_GUARD::QAR1(A)
- P(c);SBLOCK::QAB1(A)
Tries
- Try
  - K(C);P-FLIGHT
  - Vars
    - S(b);CHECK,N_GUARD::QAR1(A),XS(b)
    - S(b);N_GUARD::QAR1(A)
    - P(c);SBLOCK::QAB1(A)
  - Refutation
    - S(b);CHECK
- Try
  - Q(A);
  - Vars
    - S(b);N_GUARD::QAR1(A),XS(b)
    - S(b);N_GUARD::QAR1(A)
  - Refutation
    - K(a);P-FLIGHT
- Try
  - Q(A);
  - Vars
    - S(b);N_GUARD::QAR1(A),XS(b)
    - S(b);N_GUARD::QAR1(A)
  - Refutation
    - K(a);P-FLIGHT
Actual
- R(B);
- Vars
  - S(b);N_GUARD::QAR1(A),XS(b)
  - S(b);N_GUARD::QAR1(A)
  - P(c);SBLOCK::QAB1(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).