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Problem Display

PID: 72301 (3R4/B1p5/Q1Bn4/4N3/1K3P2/1P6/p4Prp/6k1 w - - 0 1)

Martindale, Frank W

Detroit Free Press, 1884

3R4/B1p5/Q1Bn4/4N3/1K3P2/1P6/p4Prp/6k1

#2

9 + 6

81	Chess	1953

SOLUTION

SOUND
Sets
- 1...Kh1
  - 2.Qf1#
- 1...Rxf2
  - 2.Rg8#
- 1...Rg3
  - 2.fxg3#
- 1...Rg8
  - 2.Rxg8#
- 1...Sc4
  - 2.Rd1#
- 1...Se4
  - 2.Rd1#
- 1...Sb5
  - 2.Rd1#
- 1...Sf5
  - 2.Rd1#
- 1...Sb7
  - 2.Rd1#
- 1...Sf7
  - 2.Rd1#
- 1...Sc8
  - 2.Rd1#
- 1...Se8
  - 2.Rd1#
- 1...a1Q
  - 2.Qxa1#
- 1...a1S
  - 2.Qxa1#
- 1...a1B
  - 2.Qxa1#
- 1...a1R
  - 2.Qxa1#
- 1...h1Q
  - 2.Sf3#
- 1...h1S
  - 2.Sf3#
- 1...h1B
  - 2.Sf3#
- 1...h1R
  - 2.Sf3#
Tries
- 1.Rxd6?
  - threat
    - 2.Rd1#
  - 1...Kh1
    - 2.Rd1#
    - 2.Qf1#
  - 1...a1Q
    - 2.Qxa1#
  - 1...a1R
    - 2.Qxa1#
  - 1...h1Q
    - 2.Sf3#
  - 1...h1S
    - 2.Sf3#
  - 1...h1B
    - 2.Sf3#
  - 1...h1R
    - 2.Sf3#
  - 1...cxd6!
Keys
- 1.f5!
  - 1...Rg4+
    - 2.f4#
  - 1...Kh1
    - 2.Qf1#
  - 1...Rxf2
    - 2.Rg8#
  - 1...Sxf5
    - 2.Rd1#
  - 1...Sc4
    - 2.Rd1#
  - 1...Sb5
    - 2.Rd1#
  - 1...a1Q
    - 2.Qxa1#
  - 1...a1S
    - 2.Qxa1#
  - 1...a1B
    - 2.Qxa1#
  - 1...a1R
    - 2.Qxa1#
  - 1...h1Q
    - 2.Sf3#
  - 1...h1S
    - 2.Sf3#
  - 1...h1B
    - 2.Sf3#
  - 1...h1R
    - 2.Sf3#
  - 1...Rg3
    - 2.fxg3#
  - 1...Rg5
    - 2.f4#
  - 1...Rg6
    - 2.f4#
  - 1...Rg7
    - 2.f4#
  - 1...Rg8
    - 2.Rxg8#
    - 2.f4#
  - 1...Se4
    - 2.Rd1#
  - 1...Sb7
    - 2.Rd1#
  - 1...Sf7
    - 2.Rd1#
  - 1...Sc8
    - 2.Rd1#
  - 1...Se8
    - 2.Rd1#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
Sets
- K(a);P-FLIGHT,P_SPINR(c)::QAR2(F)
- R(c);OGATEB,P_SPINR(c),XP(A)::R(I)
- R(c);OGATE::B(H)+P(A),XR(c)
- R(c);OGATEB::R(I),XR(c)
- S(e);OGATE::R(I)
- P(b);OGATE::QAR(F),XQ(b)
- P(b);OGATE::QAR(F),XS(b)
- P(b);OGATE::QAR(F),XB(b)
- P(b);OGATE::QAR(F),XR(b)
- P(d);SBLOCK::S(E)
Tries
- Try
  - R(I);XS(e)
  - Threat
    - R(I)
  - Vars
    - P(b);OGATE::QAR(F),XQ(b)
    - P(b);OGATE::QAR(F),XR(b)
    - P(d);SBLOCK::S(E)
  - Refutation
    - P(f);XR(I)
Actual
- P(D);
- Vars
  - R(c);CHECK,N_GUARD::B(H)+P(A)
  - K(a);P-FLIGHT,P_SPINR(c)::QAR2(F)
  - R(c);OGATEB,P_SPINR(c),XP(A)::R(I)
  - S(e);OGATE,XP(D)::R(I)
  - S(e);OGATE::R(I)
  - P(b);OGATE::QAR(F),XQ(b)
  - P(b);OGATE::QAR(F),XS(b)
  - P(b);OGATE::QAR(F),XB(b)
  - P(b);OGATE::QAR(F),XR(b)
  - P(d);SBLOCK::S(E)
  - R(c);OGATE::B(H)+P(A),XR(c)
  - R(c);N_GUARD::B(H)+P(A)

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).