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Problem Display

PID: 2704 (R7/2p2p2/Q3bBP1/4Kpp1/1p6/1pkN4/1R6/b7 w - - 0 1)

Stubbs, Charles Francis

Source?, 0000

R7/2p2p2/Q3bBP1/4Kpp1/1p6/1pkN4/1R6/b7

#2

7 + 9

SOLUTION

SOUND
Sets
- 1...Bd5
  - 2.Kxd5#
  - 2.Kxf5#
- 1...Bd7
  - 2.Kd5#
- 1...Bc8
  - 2.Kd5#
- 1...f4
  - 2.Ke4#
- 1...g4
  - 2.Kf4#
- 1...c5
  - 2.Kd6#
- 1...c6
  - 2.Kd6#
- 1...fxg6
  - 2.Kxe6#
Tries
- 1.Sc1?
  - 1...Bxb2
    - 2.Qd3#
  - 1...fxg6
    - 2.Kxe6#
  - 1...Bc4
    - 2.Kxf5#
  - 1...Bd5
    - 2.Kxd5#
    - 2.Kxf5#
  - 1...Bd7
    - 2.Kd5#
  - 1...Bc8
    - 2.Kd5#
  - 1...f4
    - 2.Ke4#
  - 1...g4
    - 2.Kf4#
  - 1...c5
    - 2.Kd6#
  - 1...c6
    - 2.Kd6#
  - 1...Kxb2!
- 1.Sf2?
  - threat
    - 2.Sd1#
  - 1...Bxb2
    - 2.Qd3#
  - 1...Bc4
    - 2.Kxf5#
  - 1...Kxb2!
- 1.Sc5?
  - threat
    - 2.Sa4#
  - 1...Bxb2
    - 2.Qd3#
  - 1...Bc4
    - 2.Kxf5#
  - 1...Bd7
    - 2.Kd5#
  - 1...Kxb2!
- 1.Rd8?
  - 1...fxg6
    - 2.Kxe6#
  - 1...Bc4
    - 2.Kxf5#
  - 1...Bd5
    - 2.Kxd5#
    - 2.Kxf5#
  - 1...Bd7
    - 2.Kd5#
  - 1...Bc8
    - 2.Kd5#
    - 2.Qc6#
  - 1...f4
    - 2.Ke4#
  - 1...g4
    - 2.Kf4#
  - 1...c5
    - 2.Kd6#
  - 1...c6
    - 2.Kd6#
  - 1...Bxb2!
Keys
- 1.Se1!
  - 1...Kxb2
    - 2.Qxa1#
  - 1...Bxb2
    - 2.Qd3#
  - 1...fxg6
    - 2.Kxe6#
  - 1...Bc4
    - 2.Kxf5#
  - 1...Bd5
    - 2.Kxd5#
    - 2.Kxf5#
  - 1...Bd7
    - 2.Kd5#
  - 1...Bc8
    - 2.Kd5#
  - 1...f4
    - 2.Ke4#
  - 1...g4
    - 2.Kf4#
  - 1...c5
    - 2.Kd6#
  - 1...c6
    - 2.Kd6#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
Sets
- B(g);::B(E)+K(C)
- P(e);::B(E)+K(C)
- P(f);::B(E)+K(C)
- P(h);::B(E)+K(C)
- P(i);XP(F)::B(E)+K(C),XB(g)
Tries
- Try
  - S(B);
  - Vars
    - B(a);SBLOCK,XR(A)::QAR1(D)
    - P(i);XP(F)::B(E)+K(C),XB(g)
    - B(g);::B(E)+K(C),XP(e)
    - B(g);::B(E)+K(C)
    - P(e);::B(E)+K(C)
    - P(f);::B(E)+K(C)
    - P(h);::B(E)+K(C)
  - Refutation
    - K(c);S_FLIGHT,XR(A)
- Try
  - S(B);
  - Threat
    - S(B)
  - Vars
    - B(a);SBLOCK,XR(A)::QAR1(D)
    - B(g);::B(E)+K(C),XP(e)
  - Refutation
    - K(c);S_FLIGHT,XR(A)
- Try
  - S(B);
  - Threat
    - S(B)
  - Vars
    - B(a);SBLOCK,XR(A)::QAR1(D)
    - B(g);::B(E)+K(C),XP(e)
    - B(g);::B(E)+K(C)
  - Refutation
    - K(c);S_FLIGHT,XR(A)
- Try
  - R(G);
  - Vars
    - P(i);XP(F)::B(E)+K(C),XB(g)
    - B(g);::B(E)+K(C),XP(e)
    - B(g);::B(E)+K(C)
    - P(e);::B(E)+K(C)
    - P(f);::B(E)+K(C)
    - P(h);::B(E)+K(C)
  - Refutation
    - B(a);XR(A)
Actual
- S(B);
- Vars
  - K(c);OGATEB,S_FLIGHT,XR(A)::QAB1(D),XB(a)
  - B(a);SBLOCK,XR(A)::QAR1(D)
  - P(i);XP(F)::B(E)+K(C),XB(g)
  - B(g);::B(E)+K(C),XP(e)
  - B(g);::B(E)+K(C)
  - P(e);::B(E)+K(C)
  - P(f);::B(E)+K(C)
  - P(h);::B(E)+K(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).