Meson Chess Problem Database

Home
Latest Additions
- #2
- #3
- #4
- #5
- Stats
Books
- All composers (SLOW)
- By initial letter
Magazines
- PID
- General
- Matrix
- All sources/quoters (SLOW)
- By initial letter
- Awards
- Composers
- Decades
- Quoters
- Sizes
- Soundness
- Sources
- Stipulations
- Years
Contact
Back to BDS Website

Problem Display

PID: 271881 (5qR1/1PN1p1P1/1KPk4/3p4/3P4/4N3/8/8 w - - 0 1)

Barron, Philip

The Problemist, 1956

5qR1/1PN1p1P1/1KPk4/3p4/3P4/4N3/8/8

#2

8 + 4

SOLUTION

SOUND
Sets
- 1...Qxg7
  - 2.Sf5#
  - 2.Rd8#
- 1...Qf1
  - 2.Rd8#
- 1...Qf2
  - 2.Rd8#
- 1...Qf3
  - 2.Rd8#
- 1...Qf4
  - 2.Rd8#
- 1...Qf5
  - 2.Sxf5#
- 1...Qf6
  - 2.Rd8#
- 1...Qf7
  - 2.Rd8#
- 1...Qa8
  - 2.Sf5#
- 1...Qb8
  - 2.Sf5#
- 1...Qc8
  - 2.bxc8S#
- 1...Qd8
  - 2.Sf5#
  - 2.Rxd8#
- 1...Qe8
  - 2.Sf5#
- 1...Qxg8
  - 2.Sf5#
- 1...e5
  - 2.gxf8Q#
  - 2.gxf8B#
- 1...e6
  - 2.gxf8Q#
  - 2.gxf8B#
Tries
- 1.Rxf8?
  - threat
    - 2.Sf5#
    - 2.Rd8#
  - 1...e5
    - 2.Sf5#
  - 1...e6!
- 1.gxf8S?
  - threat
    - 2.Sf5#
    - 2.Sb5#
    - 2.Se8#
  - 1...e5
    - 2.Sf5#
  - 1...e6!
- 1.gxf8R?
  - threat
    - 2.Sf5#
    - 2.Rd8#
  - 1...e5
    - 2.Sf5#
  - 1...e6!
Keys
- 1.Rh8!
  - 1...Qxg7
    - 2.Sf5#
    - 2.Rd8#
  - 1...Qxh8
    - 2.Sf5#
  - 1...e5
    - 2.gxf8Q#
    - 2.gxf8B#
  - 1...e6
    - 2.gxf8Q#
    - 2.gxf8B#
  - 1...Qf5
    - 2.Sxf5#
  - 1...Qf1
    - 2.Rd8#
  - 1...Qf2
    - 2.Rd8#
  - 1...Qf3
    - 2.Rd8#
  - 1...Qf4
    - 2.Rd8#
  - 1...Qf6
    - 2.Rd8#
  - 1...Qf7
    - 2.Rd8#
  - 1...Qa8
    - 2.Sf5#
  - 1...Qb8
    - 2.Sf5#
  - 1...Qc8
    - 2.bxc8S#
  - 1...Qd8
    - 2.Sf5#
    - 2.Rxd8#
  - 1...Qe8
    - 2.Sf5#
  - 1...Qg8
    - 2.Sf5#

FEATURES

Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- Q(d);OGATE::R(H)
- Q(d);N_GUARD::S(A),XQ(d)
- Q(d);N_GUARD::S(A)
- Q(d);N_GUARD,P_PINP(E)::S(A)
- Q(d);OGATE::PXQ(d)=S
- Q(d);N_GUARD,XR(H)::S(A)
- P(c);::PXQ(d)=Q
Tries
- Try
  - R(H);XQ(d)
  - Threat
    - DUALS(2)
  - Vars
    - P(c);::S(A)
  - Refutation
    - P(c);
- Try
  - P(G);XQ(d)
  - Threat
    - DUALS(3)
  - Vars
    - P(c);::S(A)
  - Refutation
    - P(c);
- Try
  - P(G);XQ(d)
  - Threat
    - DUALS(2)
  - Vars
    - P(c);::S(A)
  - Refutation
    - P(c);
Actual
- R(H);
- Vars
  - Q(d);N_GUARD,XR(H)::S(A)
  - P(c);::PXQ(d)=Q
  - Q(d);N_GUARD::S(A),XQ(d)
  - Q(d);OGATE::R(H)
  - Q(d);N_GUARD::S(A)
  - Q(d);N_GUARD,P_PINP(E)::S(A)
  - Q(d);OGATE::PXQ(d)=S

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).