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Problem Display

PID: 269303 (8/8/6R1/8/5bPk/6Rp/5P1p/4B2K w - - 0 1)

Ott, Roland

Zurcher Woche, 1965

8/8/6R1/8/5bPk/6Rp/5P1p/4B2K

#2

6 + 4

6490	yacpdb	2023

SOLUTION

SOUND
Sets
- 1...Bxg3
  - 2.fxg3#
Tries
- 1.Ra3?
  - 1...Bg5
    - 2.f3#
  - 1...Bc1
    - 2.f3#
    - 2.f4#
  - 1...Be3
    - 2.fxe3#
  - 1...Bg3
    - 2.fxg3#
  - 1...Be5
    - 2.f4#
  - 1...Bd6
    - 2.f4#
  - 1...Bh6
    - 2.f3#
    - 2.f4#
  - 1...Bc7
    - 2.f4#
  - 1...Bb8
    - 2.f4#
  - 1...Bd2!
- 1.Rb3?
  - 1...Bg5
    - 2.f3#
  - 1...Bc1
    - 2.f3#
    - 2.f4#
  - 1...Be3
    - 2.fxe3#
  - 1...Bg3
    - 2.fxg3#
  - 1...Be5
    - 2.f4#
  - 1...Bd6
    - 2.f4#
  - 1...Bh6
    - 2.f3#
    - 2.f4#
  - 1...Bc7
    - 2.f4#
  - 1...Bb8
    - 2.f4#
  - 1...Bd2!
- 1.Rc3?
  - 1...Bg5
    - 2.f3#
  - 1...Bc1
    - 2.f3#
    - 2.f4#
  - 1...Be3
    - 2.fxe3#
  - 1...Bg3
    - 2.fxg3#
  - 1...Be5
    - 2.f4#
  - 1...Bd6
    - 2.f4#
  - 1...Bh6
    - 2.f3#
    - 2.f4#
  - 1...Bc7
    - 2.f4#
  - 1...Bb8
    - 2.f4#
  - 1...Bd2!
- 1.Rd3?
  - 1...Bg5
    - 2.f3#
  - 1...Bc1
    - 2.f3#
    - 2.f4#
  - 1...Be3
    - 2.fxe3#
  - 1...Bg3
    - 2.fxg3#
  - 1...Be5
    - 2.f4#
  - 1...Bd6
    - 2.f4#
  - 1...Bh6
    - 2.f3#
    - 2.f4#
  - 1...Bc7
    - 2.f4#
  - 1...Bb8
    - 2.f4#
  - 1...Bd2!
Keys
- 1.Re3!
  - 1...Bxe3
    - 2.fxe3#
  - 1...Bg5
    - 2.f3#
  - 1...Bg3
    - 2.fxg3#
  - 1...Be5
    - 2.f4#
  - 1...Bd6
    - 2.f4#
  - 1...Bh6
    - 2.f3#
    - 2.f4#
  - 1...Bc7
    - 2.f4#
  - 1...Bb8
    - 2.f4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 0
Sets
- B(c);OGATE,XR(D)::P(C),XB(c)
Tries
- Try
  - R(D);
  - Vars
    - B(c);N_GUARD::B(A)+P(C)
    - B(c);OGATE::B(A)+P(C),XB(c)
    - B(c);OGATE::P(C),XB(c)
    - B(c);OGATE::B(A)+P(C)
  - Refutation
    - B(c);
- Try
  - R(D);
  - Vars
    - B(c);N_GUARD::B(A)+P(C)
    - B(c);OGATE::B(A)+P(C),XB(c)
    - B(c);OGATE::P(C),XB(c)
    - B(c);OGATE::B(A)+P(C)
  - Refutation
    - B(c);
- Try
  - R(D);
  - Vars
    - B(c);N_GUARD::B(A)+P(C)
    - B(c);OGATE::B(A)+P(C),XB(c)
    - B(c);OGATE::P(C),XB(c)
    - B(c);OGATE::B(A)+P(C)
  - Refutation
    - B(c);
- Try
  - R(D);
  - Vars
    - B(c);N_GUARD::B(A)+P(C)
    - B(c);OGATE::B(A)+P(C),XB(c)
    - B(c);OGATE::P(C),XB(c)
    - B(c);OGATE::B(A)+P(C)
  - Refutation
    - B(c);
Actual
- R(D);
- Vars
  - B(c);OGATE,XR(D)::B(A)+P(C),XB(c)
  - B(c);N_GUARD::B(A)+P(C)
  - B(c);OGATE::P(C),XB(c)
  - B(c);OGATE::B(A)+P(C)

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).