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Problem Display

PID: 23369 (1k1r4/5P2/KNR3P1/8/8/8/8/8 w - - 0 1)

Lincoln, Robert A

More Fun with Chess Miniatures, 2000

1k1r4/5P2/KNR3P1/8/8/8/8/8

#2

5 + 2

SOLUTION

SOUND
Sets
- 1...Rd1
  - 2.Rc8#
- 1...Rd2
  - 2.Rc8#
- 1...Rd3
  - 2.Rc8#
- 1...Rd4
  - 2.Rc8#
- 1...Rd5
  - 2.Rc8#
- 1...Rd6
  - 2.Rc8#
- 1...Rd7
  - 2.Rc8#
- 1...Rc8
  - 2.Rxc8#
- 1...Re8
  - 2.fxe8Q#
  - 2.fxe8R#
- 1...Rg8
  - 2.fxg8Q#
  - 2.fxg8R#
Tries
- 1.Rc7?
  - threat
    - 2.Rb7#
  - 1...Rd7
    - 2.Rc8#
  - 1...Kxc7!
- 1.f8Q?
  - threat
    - 2.Qxd8#
  - 1...Rc8
    - 2.Rxc8#
    - 2.Qxc8#
  - 1...Re8
    - 2.Qd6#
    - 2.Qxe8#
  - 1...Rxf8!
- 1.f8S?
  - 1...Rd1
    - 2.Rc8#
  - 1...Rd2
    - 2.Rc8#
  - 1...Rd3
    - 2.Rc8#
  - 1...Rd4
    - 2.Rc8#
  - 1...Rd5
    - 2.Rc8#
  - 1...Rd6
    - 2.Rc8#
  - 1...Rd7
    - 2.Sfxd7#
    - 2.Rc8#
  - 1...Rc8
    - 2.Sfd7#
    - 2.Rxc8#
  - 1...Re8
    - 2.Sfd7#
  - 1...Rxf8!
- 1.f8B?
  - 1...Rd1
    - 2.Rc8#
  - 1...Rd2
    - 2.Rc8#
  - 1...Rd3
    - 2.Rc8#
  - 1...Rd4
    - 2.Rc8#
  - 1...Rd5
    - 2.Rc8#
  - 1...Rd6
    - 2.Bxd6#
    - 2.Rc8#
  - 1...Rd7
    - 2.Rc8#
  - 1...Rc8
    - 2.Rxc8#
  - 1...Re8
    - 2.Bd6#
  - 1...Rxf8!
- 1.f8R?
  - threat
    - 2.Rxd8#
  - 1...Rc8
    - 2.Rcxc8#
    - 2.Rfxc8#
  - 1...Re8
    - 2.Rxe8#
  - 1...Rxf8!
Keys
- 1.g7!
  - 1...Rf8
    - 2.gxf8Q#
    - 2.gxf8R#
  - 1...Rd1
    - 2.Rc8#
  - 1...Rd2
    - 2.Rc8#
  - 1...Rd3
    - 2.Rc8#
  - 1...Rd4
    - 2.Rc8#
  - 1...Rd5
    - 2.Rc8#
  - 1...Rd6
    - 2.Rc8#
  - 1...Rd7
    - 2.Rc8#
  - 1...Rc8
    - 2.Rxc8#
  - 1...Re8
    - 2.fxe8Q#
    - 2.fxe8R#
  - 1...Rg8
    - 2.fxg8Q#
    - 2.fxg8R#
  - 1...Rh8
    - 2.gxh8Q#
    - 2.gxh8R#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- R(b);N_GUARD::R1(C)
- R(b);N_GUARD::R1(C),XR(b)
- R(b);OGATE::PXR(b)=Q
Tries
- Try
  - R(C);
  - Threat
    - R1(C)
  - Vars
    - R(b);N_GUARD::R1(C)
  - Refutation
    - K(a);S_FLIGHT,XR(C)
- Try
  - P(E);P_PINR(b)
  - Threat
    - QAR2(E),XR(b)
  - Refutation
    - R(b);N_SPINR(b),XQ(E)
- Try
  - P(E);
  - Vars
    - R(b);N_GUARD::R1(C)
    - R(b);N_GUARD::S(E)
  - Refutation
    - R(b);XS(E)
- Try
  - P(E);
  - Vars
    - R(b);N_GUARD::R1(C)
    - R(b);N_GUARD::R1(C),XR(b)
    - R(b);N_GUARD::B(E)
  - Refutation
    - R(b);XB(E)
- Try
  - P(E);P_PINR(b)
  - Threat
    - R(E),XR(b)
  - Vars
    - R(b);OGATEB::R(E),XR(b)
  - Refutation
    - R(b);N_SPINR(b),XR(E)
Actual
- P(D);
- Vars
  - R(b);OGATE::PXR(b)=Q
  - R(b);N_GUARD::R1(C)
  - R(b);N_GUARD::R1(C),XR(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).