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Problem Display

PID: 110644 (8/7B/6p1/1N2p2b/1pK3np/2p1pR2/2pPk1P1/2Q4N w - - 0 1)

Joensson, G

To Mat, 1958

8/7B/6p1/1N2p2b/1pK3np/2p1pR2/2pPk1P1/2Q4N

#2

8 + 10

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Sf2
  - 2.Rxe3#
- 1...Sh2
  - 2.Rxe3#
- 1...Sf6
  - 2.Rxe3#
- 1...Sh6
  - 2.Rxe3#
- 1...cxd2
  - 2.Qf1#
- 1...exd2
  - 2.Qf1#
- 1...b3
  - 2.Sxc3#
- 1...h3
  - 2.Sg3#
- 1...e4
  - 2.Sd4#
- 1...g5
  - 2.Bd3#
Tries
- 1.Bxg6?
  - threat
    - 2.Bd3#
  - 1...Sf2
    - 2.Rxe3#
  - 1...e4
    - 2.Sd4#
  - 1...Bxg6!
- 1.Bg8?
  - 1...cxd2
    - 2.Qf1#
  - 1...exd2
    - 2.Qf1#
  - 1...b3
    - 2.Sxc3#
  - 1...Sf2
    - 2.Rxe3#
  - 1...Sh2
    - 2.Rxe3#
  - 1...Sf6
    - 2.Rxe3#
  - 1...Sh6
    - 2.Rxe3#
  - 1...h3
    - 2.Sg3#
  - 1...e4
    - 2.Sd4#
  - 1...g5!
- 1.dxc3?
  - 1...bxc3
    - 2.Sxc3#
  - 1...Sf2
    - 2.Rxe3#
  - 1...Sh2
    - 2.Rxe3#
  - 1...Sf6
    - 2.Rxe3#
  - 1...Sh6
    - 2.Rxe3#
  - 1...h3
    - 2.Sg3#
  - 1...e4
    - 2.Sd4#
  - 1...g5
    - 2.Bd3#
  - 1...b3!
- 1.d3?
  - 1...b3
    - 2.Sxc3#
  - 1...Sf2
    - 2.Rxe3#
  - 1...Sh2
    - 2.Rxe3#
  - 1...Sf6
    - 2.Rxe3#
  - 1...Sh6
    - 2.Rxe3#
  - 1...h3
    - 2.Sg3#
  - 1...e4
    - 2.Sd4#
  - 1...g5!
- 1.d4?
  - 1...exd4
    - 2.Sxd4#
  - 1...b3
    - 2.Sxc3#
  - 1...Sf2
    - 2.Rxe3#
  - 1...Sh2
    - 2.Rxe3#
  - 1...Sf6
    - 2.Rxe3#
  - 1...Sh6
    - 2.Rxe3#
  - 1...h3
    - 2.Sg3#
  - 1...g5
    - 2.Bd3#
  - 1...e4!
Keys
- 1.dxe3!
  - 1...Sxe3+
    - 2.Rxe3#
  - 1...b3
    - 2.Sxc3#
  - 1...Sf2
    - 2.Rxf2#
  - 1...Sh2
    - 2.Rf2#
  - 1...Sf6
    - 2.Rf2#
  - 1...Sh6
    - 2.Rf2#
  - 1...h3
    - 2.Sg3#
  - 1...e4
    - 2.Sd4#
  - 1...g5
    - 2.Bd3#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 2
Sets
- S(f);N_GUARD::R1(E),XP(d)
- P(c);SBLOCK,XP(C)::QAB1(A)
- P(d);SBLOCK,XP(C)::QAB1(A)
- P(e);N_GUARD::S(G),XP(c)
- P(g);N_GUARD::S(B)
- P(h);N_GUARD::S(G)
- P(j);OGATE::B(H)
Tries
- Try
  - B(H);XP(j)
  - Threat
    - B(H)
  - Vars
    - S(f);N_GUARD::R1(E),XP(d)
    - P(h);N_GUARD::S(G)
  - Refutation
    - B(i);XB(H)
- Try
  - B(H);
  - Vars
    - P(c);SBLOCK,XP(C)::QAB1(A)
    - P(d);SBLOCK,XP(C)::QAB1(A)
    - P(e);N_GUARD::S(G),XP(c)
    - S(f);N_GUARD::R1(E),XP(d)
    - P(g);N_GUARD::S(B)
    - P(h);N_GUARD::S(G)
  - Refutation
    - P(j);
- Try
  - P(C);XP(c)
  - Vars
    - P(e);XP(C)::S(G),XP(e)
    - S(f);N_GUARD::R1(E),XP(d)
    - P(g);N_GUARD::S(B)
    - P(h);N_GUARD::S(G)
    - P(j);OGATE::B(H)
  - Refutation
    - P(e);
- Try
  - P(C);
  - Vars
    - P(e);N_GUARD::S(G),XP(c)
    - S(f);N_GUARD::R1(E),XP(d)
    - P(g);N_GUARD::S(B)
    - P(h);N_GUARD::S(G)
  - Refutation
    - P(j);
- Try
  - P(C);
  - Vars
    - P(h);XP(C)::S(G),XP(h)
    - P(e);N_GUARD::S(G),XP(c)
    - S(f);N_GUARD::R1(E),XP(d)
    - P(g);N_GUARD::S(B)
    - P(j);OGATE::B(H)
  - Refutation
    - P(h);
Actual
- P(C);XP(d)
- Vars
  - S(f);CHECK,OGATE,XP(C)::R1(E),XS(f)
  - P(e);N_GUARD::S(G),XP(c)
  - S(f);N_GUARD::R1(E),XS(f)
  - S(f);N_GUARD::R1(E)
  - P(g);N_GUARD::S(B)
  - P(h);N_GUARD::S(G)
  - P(j);OGATE::B(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).