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: 27220 (8/4n1p1/3PPkpR/4R3/3N4/5K2/7B/8 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

8/4n1p1/3PPkpR/4R3/3N4/5K2/7B/8

#2

7 + 4

SOLUTION

SOUND
Sets
- 1...Sd5
  - 2.Rf5#
- 1...Sf5
  - 2.Rxf5#
- 1...Sc6
  - 2.Rf5#
- 1...Sc8
  - 2.Rf5#
- 1...Sg8
  - 2.Rf5#
Tries
- 1.Ke2?
  - 1...Sf5
    - 2.Rxf5#
  - 1...Sd5
    - 2.Rf5#
  - 1...Sc6
    - 2.Rf5#
  - 1...Sc8
    - 2.Rf5#
  - 1...Sg8
    - 2.Rf5#
  - 1...gxh6!
- 1.Kf2?
  - 1...Sf5
    - 2.Rxf5#
  - 1...Sd5
    - 2.Rf5#
  - 1...Sc6
    - 2.Rf5#
  - 1...Sc8
    - 2.Rf5#
  - 1...Sg8
    - 2.Rf5#
  - 1...gxh6!
- 1.Kg2?
  - 1...Sf5
    - 2.Rxf5#
  - 1...Sd5
    - 2.Rf5#
  - 1...Sc6
    - 2.Rf5#
  - 1...Sc8
    - 2.Rf5#
  - 1...Sg8
    - 2.Rf5#
  - 1...gxh6!
- 1.Ke4?
  - 1...Sf5
    - 2.Rxf5#
  - 1...Sd5
    - 2.Rf5#
  - 1...Sc6
    - 2.Rf5#
  - 1...Sc8
    - 2.Rf5#
  - 1...Sg8
    - 2.Rf5#
  - 1...gxh6!
- 1.Kg4?
  - 1...Sd5
    - 2.Rf5#
  - 1...Sf5
    - 2.Rxf5#
  - 1...Sc6
    - 2.Rf5#
  - 1...Sc8
    - 2.Rf5#
  - 1...Sg8
    - 2.Rf5#
  - 1...gxh6!
- 1.Bg3?
  - 1...Sf5
    - 2.Rxf5#
  - 1...Sd5
    - 2.Rf5#
  - 1...Sc6
    - 2.Rf5#
  - 1...Sc8
    - 2.Rf5#
  - 1...Sg8
    - 2.Rf5#
  - 1...gxh6!
- 1.Bf4?
  - 1...Sd5
    - 2.Rf5#
  - 1...Sf5
    - 2.Rxf5#
  - 1...Sc6
    - 2.Rf5#
  - 1...Sc8
    - 2.Rf5#
  - 1...Sg8
    - 2.Rf5#
  - 1...gxh6!
- 1.Rxg6+?
  - 1...Sxg6
    - 2.Rf5#
  - 1...Kxg6!
Keys
- 1.Reh5!
  - threat
    - 2.Be5#
  - 1...Sf5
    - 2.Rxf5#
  - 1...Sc6
    - 2.Rf5#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 3
Sets
- S(c);N_GUARD::R1(D)
- S(c);N_GUARD::R1(D),XS(c)
Tries
- Try
  - K(B);S_FLIGHT
  - Vars
    - S(c);N_GUARD::R1(D),XS(c)
    - S(c);N_GUARD::R1(D)
  - Refutation
    - P(d);N_SPINP(b),XR(G)
- Try
  - K(B);P-FLIGHT
  - Vars
    - S(c);N_GUARD::R1(D),XS(c)
    - S(c);N_GUARD::R1(D)
  - Refutation
    - P(d);N_SPINP(b),XR(G)
- Try
  - K(B);S_FLIGHT
  - Vars
    - S(c);N_GUARD::R1(D),XS(c)
    - S(c);N_GUARD::R1(D)
  - Refutation
    - P(d);N_SPINP(b),XR(G)
- Try
  - K(B);S_FLIGHT
  - Vars
    - S(c);N_GUARD::R1(D),XS(c)
    - S(c);N_GUARD::R1(D)
  - Refutation
    - P(d);N_SPINP(b),XR(G)
- Try
  - K(B);S_FLIGHT
  - Vars
    - S(c);N_GUARD::R1(D)
    - S(c);N_GUARD::R1(D),XS(c)
  - Refutation
    - P(d);N_SPINP(b),XR(G)
- Try
  - B(A);
  - Vars
    - S(c);N_GUARD::R1(D),XS(c)
    - S(c);N_GUARD::R1(D)
  - Refutation
    - P(d);N_SPINP(b),XR(G)
- Try
  - B(A);
  - Vars
    - S(c);N_GUARD::R1(D)
    - S(c);N_GUARD::R1(D),XS(c)
  - Refutation
    - P(d);N_SPINP(b),XR(G)
- Try
  - R(G);CHECK,XP(b)
  - Vars
    - S(c);SBLOCK,XR(G)::R1(D)
  - Refutation
    - K(a);P-FLIGHT,XR(G)
Actual
- R(D);
- Threat
  - B(A)
- Vars
  - S(c);N_GUARD::R1(D),XS(c)
  - S(c);N_GUARD::R1(D)

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).