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Problem Display

PID: 7400 (8/3N4/2pb4/8/4k3/1R1RP3/B5K1/8 w - - 0 1)

Rosberger, Jack

StrateGems, 1999

8/3N4/2pb4/8/4k3/1R1RP3/B5K1/8

#2

6 + 3

SOLUTION

SOUND
Tries
- 1.Bb1?
  - threat
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rxd6#
  - 1...Bh2
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Ba3
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Bg3
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Bb4
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Bf4
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Bc5
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Be5
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Bc7
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Be7
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Bb8
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Bf8
    - 2.Rd1#
    - 2.Rd2#
    - 2.Rd4#
    - 2.Rd6#
  - 1...Kf5!
Keys
- 1.Rd5!
  - threat
    - 2.Sf6#
  - 1...Kxd5
    - 2.Rb4#
  - 1...cxd5
    - 2.Bb1#
  - 1...Be5
    - 2.Rxe5#
  - 1...Be7
    - 2.Re5#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
Sets
Tries
- Try
  - B(A);
  - Threat
    - DUALS(4)
  - Refutation
    - K(a);S_FLIGHT
Actual
- R(D);
- Threat
  - S(F)
- Vars
  - K(a);S_FLIGHT,XR(D)::B(A)+R(C)
  - P(b);SBLOCK,XR(D)::B(A)
  - B(c);N_GUARD::R1(D),XB(c)
  - B(c);N_GUARD::R1(D)

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).