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Problem Display

PID: 171416 (8/5pP1/8/N7/6p1/6K1/k7/2Q5 w - - 0 1)

Antipov, Viacheslav Pavlovich

Shakh-M (Borovich), 1997

8/5pP1/8/N7/6p1/6K1/k7/2Q5

#2

4 + 3

6490	yacpdb	2018

SOLUTION

SOUND
Sets
- 1...f5
  - 2.g8Q#
  - 2.g8B#
- 1...f6
  - 2.g8Q#
  - 2.g8B#
Tries
- 1.Kf2?
  - 1...f5
    - 2.g8Q#
    - 2.g8B#
  - 1...f6
    - 2.g8Q#
    - 2.g8B#
  - 1...g3+!
- 1.Kg2?
  - 1...f5
    - 2.g8Q#
    - 2.g8B#
  - 1...f6
    - 2.g8Q#
    - 2.g8B#
  - 1...g3!
- 1.Kh2?
  - 1...f5
    - 2.g8Q#
    - 2.g8B#
  - 1...f6
    - 2.g8Q#
    - 2.g8B#
  - 1...g3+!
- 1.Kf4?
  - 1...f5
    - 2.g8Q#
    - 2.g8B#
  - 1...f6
    - 2.g8Q#
    - 2.g8B#
  - 1...g3!
- 1.Kxg4?
  - 1...f6
    - 2.g8Q#
    - 2.g8B#
  - 1...f5+!
- 1.Kh4?
  - 1...f5
    - 2.g8Q#
    - 2.g8B#
  - 1...f6
    - 2.g8Q#
    - 2.g8B#
  - 1...g3!
- 1.Sc6?
  - 1...f5
    - 2.g8Q#
    - 2.g8B#
  - 1...f6
    - 2.g8Q#
    - 2.g8B#
  - 1...Kb3!
- 1.Sb7?
  - 1...f5
    - 2.g8Q#
    - 2.g8B#
  - 1...f6
    - 2.g8Q#
    - 2.g8B#
  - 1...Kb3!
- 1.Qb1+?
  - 1...Ka3
    - 2.Qb3#
  - 1...Kxb1!
Keys
- 1.Qc2+!
  - 1...Ka1
    - 2.Sb3#
  - 1...Ka3
    - 2.Qb3#

FEATURES

Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
- P(c);::P=Q
Tries
- Try
  - K(B);S_FLIGHT
  - Vars
    - P(c);::P=Q
  - Refutation
    - P(b);CHECK
- Try
  - K(B);P-FLIGHT
  - Vars
    - P(c);::P=Q
  - Refutation
    - P(b);
- Try
  - K(B);S_FLIGHT
  - Vars
    - P(c);::P=Q
  - Refutation
    - P(b);CHECK
- Try
  - K(B);S_FLIGHT
  - Vars
    - P(c);::P=Q
  - Refutation
    - P(b);
- Try
  - K(B);P-FLIGHT,XP(b)
  - Vars
    - P(c);::P=Q
  - Refutation
    - P(c);CHECK
- Try
  - K(B);S_FLIGHT
  - Vars
    - P(c);::P=Q
  - Refutation
    - P(b);
- Try
  - S(C);
  - Vars
    - P(c);::P=Q
  - Refutation
    - K(a);S_FLIGHT
- Try
  - S(C);
  - Vars
    - P(c);::P=Q
  - Refutation
    - K(a);S_FLIGHT
- Try
  - Q(A);CHECK
  - Vars
    - K(a);P-FLIGHT::QAR1(A)
  - Refutation
    - K(a);S_FLIGHT,XQ(A)
Actual
- Q(A);CHECK
- Vars
  - K(a);P-FLIGHT::S(C)
  - K(a);P-FLIGHT::QAR1(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).