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Problem Display

PID: 18221 (8/8/8/B4P2/B2N4/1P2p2N/4pR2/1K1k4 w - - 0 1)

Thomson, PC

L'Echiquier de Paris, 1954

8/8/8/B4P2/B2N4/1P2p2N/4pR2/1K1k4

#2

8 + 3

SOLUTION

SOUND
Sets
- 1...e1Q
  - 2.b4#
- 1...e1B
  - 2.b4#
- 1...e1R
  - 2.b4#
- 1...exf2
  - 2.Sxf2#
Tries
- 1.Kb2?
  - 1...exf2
    - 2.Sxf2#
  - 1...e1Q
    - 2.b4#
  - 1...e1B
    - 2.b4#
  - 1...e1R
    - 2.b4#
  - 1...e1S!
- 1.Sc6?
  - 1...exf2
    - 2.Sxf2#
  - 1...e1Q
    - 2.b4#
  - 1...e1B
    - 2.b4#
  - 1...e1R
    - 2.b4#
  - 1...e1S!
- 1.Se6?
  - 1...exf2
    - 2.Sxf2#
  - 1...e1Q
    - 2.b4#
  - 1...e1B
    - 2.b4#
  - 1...e1R
    - 2.b4#
  - 1...e1S!
- 1.Rg2?
  - 1...e1Q
    - 2.b4#
  - 1...e1B
    - 2.b4#
  - 1...e1R
    - 2.b4#
  - 1...e1S!
- 1.Rh2?
  - 1...e1Q
    - 2.b4#
  - 1...e1B
    - 2.b4#
  - 1...e1R
    - 2.b4#
  - 1...e1S!
- 1.b4+?
  - 1...Ke1
    - 2.Sf3#
    - 2.b5#
  - 1...Kd2!
- 1.f6?
  - 1...exf2
    - 2.Sxf2#
  - 1...e1Q
    - 2.b4#
  - 1...e1B
    - 2.b4#
  - 1...e1R
    - 2.b4#
  - 1...e1S!
Keys
- 1.Sb5!
  - 1...exf2
    - 2.Sxf2#
  - 1...e1Q
    - 2.b4#
  - 1...e1S
    - 2.Sc3#
  - 1...e1B
    - 2.b4#
  - 1...e1R
    - 2.Sc3#
    - 2.b4#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
Sets
- P(b);SBLOCK::B(E)+P(C)
- P(c);XR(B)::S(D),XP(c)
Tries
- Try
  - K(A);P-FLIGHT
  - Vars
    - P(c);XR(B)::S(D),XP(c)
    - P(b);SBLOCK::B(E)+P(C)
  - Refutation
    - P(b);
- Try
  - S(F);
  - Vars
    - P(c);XR(B)::S(D),XP(c)
    - P(b);SBLOCK::B(E)+P(C)
  - Refutation
    - P(b);
- Try
  - S(F);
  - Vars
    - P(c);XR(B)::S(D),XP(c)
    - P(b);SBLOCK::B(E)+P(C)
  - Refutation
    - P(b);
- Try
  - R(B);
  - Vars
    - P(b);SBLOCK::B(E)+P(C)
  - Refutation
    - P(b);
- Try
  - R(B);
  - Vars
    - P(b);SBLOCK::B(E)+P(C)
  - Refutation
    - P(b);
- Try
  - P(C);CHECK
  - Refutation
    - K(a);P-FLIGHT,P_SPINP(b)
- Try
  - P(H);
  - Vars
    - P(c);XR(B)::S(D),XP(c)
    - P(b);SBLOCK::B(E)+P(C)
  - Refutation
    - P(b);
Actual
- S(F);
- Vars
  - P(c);XR(B)::S(D),XP(c)
  - P(b);SBLOCK::B(E)+P(C)
  - P(b);SBLOCK::S(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).