MESON Chess Problem Database

Problem Display
PID: 205495 (8/8/5K2/3p1n2/4k3/2Q2R2/1n6/8 w - - 0 1)

Schonberger, Tibor

L'Echiquier Marseillais, 1925

8/8/5K2/3p1n2/4k3/2Q2R2/1n6/8

#2

3 + 4

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...Sc4
      • 2.Qd3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sg3
      • 2.Qe3#
    • 1...Sd4
      • 2.Qe3#
    • 1...Sh4
      • 2.Qe3#
    • 1...Sd6
      • 2.Qe3#
    • 1...Sh6
      • 2.Qe3#
    • 1...Se7
      • 2.Qe3#
    • 1...Sg7
      • 2.Qe3#
    • 1...d4
      • 2.Qc6#
  • Tries
    • 1.Qb3?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sg3
        • 2.Qe3#
      • 1...Sd4
        • 2.Qe3#
      • 1...Sh4
        • 2.Qe3#
      • 1...Sd6
        • 2.Qe3#
      • 1...Sh6
        • 2.Qe3#
      • 1...Se7
        • 2.Qe3#
      • 1...Sg7
        • 2.Qe3#
      • 1...d4
        • 2.Qb7#
      • 1...Kd4!
  • Keys
    • 1.Qa3!
      • 1...Kd4
        • 2.Rf4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sg3
        • 2.Qe3#
      • 1...Sd4
        • 2.Qe3#
      • 1...Sh4
        • 2.Qe3#
      • 1...Sd6
        • 2.Qe3#
      • 1...Sh6
        • 2.Qe3#
      • 1...Se7
        • 2.Qe3#
      • 1...Sg7
        • 2.Qe3#
      • 1...d4
        • 2.Qa8#

Anticipated by 4973(1895), 33187(1895)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • S(d);N_GUARD::QAR1(A),XS(d)
    • S(d);N_GUARD::QAR1(A)
    • P(c);OGATEB,SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(d);N_GUARD::QAR1(A),XS(d)
        • S(a);N_GUARD::QAB1(A)
        • S(d);N_GUARD::QAR1(A)
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::R(B)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • S(d);N_GUARD::QAR1(A),XS(d)
      • S(a);N_GUARD::QAB1(A)
      • S(d);N_GUARD::QAR1(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
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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).