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Problem Display

PID: 205841 (5Q2/6pk/8/7P/5pNP/5K2/8/8 w - - 0 1)

Klein, Max

Troll, 2019

5Q2/6pk/8/7P/5pNP/5K2/8/8

#2

5 + 3

SOLUTION

SOUND
Sets
- 1...g5
  - 2.Sf6#
- 1...g6
  - 2.Sf6#
Tries
- 1.Ke2?
  - 1...g5
    - 2.Sf6#
  - 1...g6
    - 2.Sf6#
  - 1...f3+!
- 1.Kf2?
  - 1...g5
    - 2.Sf6#
  - 1...g6
    - 2.Sf6#
  - 1...f3!
- 1.Kg2?
  - 1...g5
    - 2.Sf6#
  - 1...g6
    - 2.Sf6#
  - 1...f3+!
- 1.Ke4?
  - 1...g5
    - 2.Sf6#
  - 1...g6
    - 2.Sf6#
  - 1...f3!
- 1.Kxf4?
  - 1...g6
    - 2.Sf6#
  - 1...g5+!
- 1.Sf6+?
  - 1...Kh6
    - 2.Qh8#
  - 1...gxf6!
Keys
- 1.Se5!
  - 1...Kh6
    - 2.Qh8#
  - 1...g5
    - 2.hxg5 ep#
  - 1...g6
    - 2.hxg6#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- P(b);N_GUARD::S(B)
Tries
- Try
  - K(A);S_FLIGHT
  - Vars
    - P(b);N_GUARD::S(B)
  - Refutation
    - P(a);CHECK
- Try
  - K(A);P-FLIGHT
  - Vars
    - P(b);N_GUARD::S(B)
  - Refutation
    - P(a);
- Try
  - K(A);S_FLIGHT
  - Vars
    - P(b);N_GUARD::S(B)
  - Refutation
    - P(a);CHECK
- Try
  - K(A);S_FLIGHT
  - Vars
    - P(b);N_GUARD::S(B)
  - Refutation
    - P(a);
- Try
  - K(A);P-FLIGHT,XP(a)
  - Vars
    - P(b);N_GUARD::S(B)
  - Refutation
    - P(b);CHECK
- Try
  - S(B);CHECK
  - Vars
    - K(c);P-FLIGHT,P_SPINP(b)::QAR2(E)
  - Refutation
    - P(b);XS(B)
Actual
- S(B);
- Vars
  - K(c);P-FLIGHT,P_SPINP(b)::QAR2(E)
  - P(b);OGATE::P(D),XP(b),EP
  - P(b);OGATE::P(D),XP(b)

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).