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Problem Display

PID: 163493 (8/p1B1pp1K/3p1k2/QR6/8/2P1b2B/4R3/8 w - - 0 1)

Moisiyenko, Anatoly

idee & form, 1990

8/p1B1pp1K/3p1k2/QR6/8/2P1b2B/4R3/8

#2

7 + 6

15601	Albrecht-Leiss-Degener Collection	2017

SOLUTION

SOUND
Sets
- 1...Bc1
  - 2.Rf5#
- 1...Bg1
  - 2.Rf5#
- 1...Bd2
  - 2.Rf5#
- 1...Bf2
  - 2.Rxf2#
  - 2.Rf5#
- 1...Bd4
  - 2.Rf5#
- 1...Bf4
  - 2.Rf5#
- 1...Bg5
  - 2.Rf5#
- 1...Bb6
  - 2.Rf5#
- 1...Bh6
  - 2.Rf5#
- 1...e5
  - 2.Bd8#
- 1...e6
  - 2.Bd8#
Tries
- 1.Rf2+?
  - 1...Bf4
    - 2.Rxf4#
  - 1...Bxf2!
- 1.Rxe3?
  - threat
    - 2.Rf3#
    - 2.Rf5#
  - 1...e5
    - 2.Bd8#
  - 1...e6
    - 2.Bd8#
  - 1...d5!
- 1.Rd5?
  - 1...e5
    - 2.Bd8#
  - 1...e6
    - 2.Bd8#
  - 1...Bc1
    - 2.Rf5#
  - 1...Bg1
    - 2.Rf5#
  - 1...Bd2
    - 2.Rf5#
  - 1...Bf2
    - 2.Rxf2#
    - 2.Rf5#
  - 1...Bd4
    - 2.Rf5#
  - 1...Bf4
    - 2.Rf5#
  - 1...Bc5
    - 2.Rf5#
  - 1...Bg5
    - 2.Rf5#
  - 1...Bb6
    - 2.Rf5#
  - 1...Bh6
    - 2.Rf5#
  - 1...a6!
- 1.Rg5?
  - threat
    - 2.Qf5#
  - 1...Bc5
    - 2.Rf5#
  - 1...e5
    - 2.Bd8#
  - 1...e6
    - 2.Bd8#
  - 1...d5!
- 1.Rb6?
  - threat
    - 2.Qf5#
  - 1...e5
    - 2.Bd8#
  - 1...e6
    - 2.Bd8#
  - 1...Bc5!
- 1.Qa6?
  - 1...e5
    - 2.Bd8#
  - 1...e6
    - 2.Bd8#
  - 1...Bc1
    - 2.Rf5#
  - 1...Bg1
    - 2.Rf5#
  - 1...Bd2
    - 2.Rf5#
  - 1...Bf2
    - 2.Rxf2#
    - 2.Rf5#
  - 1...Bd4
    - 2.Rf5#
  - 1...Bf4
    - 2.Rf5#
  - 1...Bg5
    - 2.Rf5#
  - 1...Bb6
    - 2.Rf5#
  - 1...Bh6
    - 2.Rf5#
  - 1...Bc5!
Keys
- 1.Rh5!
  - threat
    - 2.Qf5#
  - 1...e5
    - 2.Bd8#
  - 1...e6
    - 2.Bd8#
  - 1...Bc5
    - 2.Rf5#
  - 1...d5
    - 2.Be5#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 8
Sets
- B(a);::R1(E)
- P(e);OGATEB::B(F)
Tries
- Try
  - R(A);CHECK
  - Vars
    - B(a);N_GUARD,P_SPINB(a)::R(A),XB(a)
  - Refutation
    - B(a);XR(A)
- Try
  - R(A);XB(a)
  - Threat
    - DUALS(2)
  - Vars
    - P(e);OGATEB::B(F)
  - Refutation
    - P(b);
- Try
  - R(E);
  - Vars
    - P(e);OGATEB::B(F)
    - B(a);::R1(E)
  - Refutation
    - P(d);
- Try
  - R(E);
  - Threat
    - QAR1(D)
  - Vars
    - B(a);::R1(E)
    - P(e);OGATEB::B(F)
  - Refutation
    - P(b);
- Try
  - R(E);P_PINP(b)
  - Threat
    - QAR1(D)
  - Vars
    - P(e);OGATEB::B(F)
    - P(e);N_SPINP(b),OGATEB::B(F)
  - Refutation
    - B(a);
- Try
  - Q(D);P_PINP(b)
  - Vars
    - P(e);OGATEB::B(F)
    - P(e);N_SPINP(b),OGATEB::B(F)
    - B(a);::R1(E)
    - B(a);N_SPINP(b)::R1(E)
  - Refutation
    - B(a);
Actual
- R(E);
- Threat
  - QAR1(D)
- Vars
  - P(e);OGATEB::B(F)
  - B(a);::R1(E)
  - P(b);OGATE::B(F)

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).