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Problem Display

PID: 210110 (n7/3pp3/3pk1P1/3N3R/2p1NP2/2pn4/2B5/1K1R4 w - - 0 1)

Kromhout, JD

Probleemblad, 1944

n7/3pp3/3pk1P1/3N3R/2p1NP2/2pn4/2B5/1K1R4

#2

8 + 8

SOLUTION

SOUND
Sets
- 1...Sc1
  - 2.Sg5#
- 1...Se1
  - 2.Sg5#
- 1...Sb2
  - 2.Sg5#
- 1...Sf2
  - 2.Sg5#
- 1...Sb4
  - 2.Sg5#
- 1...Sxf4
  - 2.Sxf4#
- 1...Sc5
  - 2.Sg5#
- 1...Se5
  - 2.Sg5#
  - 2.f5#
- 1...Sb6
  - 2.Sc7#
- 1...Sc7
  - 2.Sxc7#
Tries
- 1.Sc5+?
  - 1...Sxc5
    - 2.Bf5#
  - 1...dxc5!
- 1.Rd2?
  - 1...Sxf4
    - 2.Sxf4#
  - 1...Sb6
    - 2.Sc7#
  - 1...Sc1
    - 2.Sg5#
  - 1...Se1
    - 2.Sg5#
  - 1...Sb2
    - 2.Sg5#
  - 1...Sf2
    - 2.Sg5#
  - 1...Sb4
    - 2.Sg5#
  - 1...Sc5
    - 2.Sg5#
  - 1...Se5
    - 2.Sg5#
    - 2.f5#
  - 1...Sc7
    - 2.Sxc7#
  - 1...cxd2!
- 1.Rxd3?
  - 1...Sb6
    - 2.Sc7#
  - 1...Sc7
    - 2.Sxc7#
  - 1...cxd3!
- 1.Re5+?
  - 1...Sxe5
    - 2.Sg5#
  - 1...dxe5!
- 1.g7?
  - threat
    - 2.g8Q#
    - 2.g8B#
  - 1...Sxf4
    - 2.g8Q#
    - 2.g8B#
  - 1...Sb6
    - 2.g8Q#
    - 2.g8B#
  - 1...Sc1
    - 2.Sg5#
    - 2.g8Q#
    - 2.g8B#
  - 1...Se1
    - 2.Sg5#
    - 2.g8Q#
    - 2.g8B#
  - 1...Sb2
    - 2.Sg5#
    - 2.g8Q#
    - 2.g8B#
  - 1...Sf2
    - 2.Sg5#
    - 2.g8Q#
    - 2.g8B#
  - 1...Sb4
    - 2.Sg5#
    - 2.g8Q#
    - 2.g8B#
  - 1...Sc5
    - 2.Sg5#
    - 2.g8Q#
    - 2.g8B#
  - 1...Se5
    - 2.Sg5#
  - 1...Sc7
    - 2.g8Q#
    - 2.g8B#
  - 1...Kf7!
Keys
- 1.Ka1!
  - 1...Sxf4
    - 2.Sxf4#
  - 1...Sc1
    - 2.Sg5#
  - 1...Se1
    - 2.Sg5#
  - 1...Sb2
    - 2.Sg5#
  - 1...Sf2
    - 2.Sg5#
  - 1...Sb4
    - 2.Sg5#
  - 1...Sc5
    - 2.Sg5#
  - 1...Se5
    - 2.Sg5#
    - 2.f5#
  - 1...Sb6
    - 2.Sc7#
  - 1...Sc7
    - 2.Sxc7#

FEATURES

Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- S(b);::S(D)
- S(b);XP(E)::S(F),XS(b)
- S(h);N_GUARD::S(F)
- S(h);N_GUARD::S(F),XS(h)
Tries
- Try
  - S(D);CHECK
  - Vars
    - S(b);OGATE,XS(D)::B(C)
  - Refutation
    - P(d);XS(D)
- Try
  - R(B);
  - Vars
    - S(b);XP(E)::S(F),XS(b)
    - S(h);N_GUARD::S(F)
    - S(b);::S(D)
    - S(h);N_GUARD::S(F),XS(h)
  - Refutation
    - P(a);XR(B)
- Try
  - R(B);XS(b)
  - Vars
    - S(h);N_GUARD::S(F)
    - S(h);N_GUARD::S(F),XS(h)
  - Refutation
    - P(c);XR(B)
- Try
  - R(G);CHECK
  - Vars
    - S(b);XR(G)::S(D)
  - Refutation
    - P(d);XR(G)
- Try
  - P(H);
  - Threat
    - P=Q
  - Vars
    - S(b);XP(E)::P=Q
    - S(h);::P=Q
    - S(b);::S(D)
  - Refutation
    - K(e);S_FLIGHT
Actual
- K(A);P-FLIGHT
- Vars
  - S(b);XP(E)::S(F),XS(b)
  - S(b);::S(D)
  - S(h);N_GUARD::S(F)
  - S(h);N_GUARD::S(F),XS(h)

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).