MESON Chess Problem Database

Problem Display
PID: 100034 (6n1/5R2/4k1P1/2Q5/1nK5/8/8/8 w - - 0 1)

Stocchi, Ottavio

Magyar Sakkvilag, 1934

6n1/5R2/4k1P1/2Q5/1nK5/8/8/8

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qd5#
    • 1...Sc2
      • 2.Qd5#
    • 1...Sd3
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
    • 1...Sc6
      • 2.Qd5#
    • 1...Sf6
      • 2.Re7#
    • 1...Sh6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Kd4?
      • threat
        • 2.Qe5#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sd3
        • 2.Qb6#
        • 2.Qd5#
        • 2.Qc6#
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qc6#
      • 1...Sc2+!
    • 1.Qg5?
      • 1...Se7
        • 2.Qxe7#
      • 1...Sa2
        • 2.Qd5#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sd3
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa6
        • 2.Qd5#
      • 1...Sc6
        • 2.Qd5#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sh6
        • 2.Qf6#
        • 2.Qe7#
      • 1...Kd6!
    • 1.g7?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sa2
        • 2.Qd5#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sd3
        • 2.Qd5#
      • 1...Sa6
        • 2.Qd5#
      • 1...Sc6
        • 2.Qd5#
      • 1...Sf6
        • 2.Re7#
      • 1...Sh6
        • 2.Qe7#
      • 1...Kxf7!
  • Keys
    • 1.Qd4!
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sa2
        • 2.Qd5#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sd3
        • 2.Qd5#
      • 1...Sa6
        • 2.Qd5#
      • 1...Sc6
        • 2.Qd5#
      • 1...Sh6
        • 2.Qf6#
      • 1...Se7
        • 2.Rf6#

Anticipated by 110804(1889)

This anticipates 221672(1987)

This is a version of 28095

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
    • S(c);N_GUARD,SBLOCK::R1(D)
    • S(c);N_GUARD::QAR1(B)
    • S(c);N_GUARD::QAR1(B),XS(c)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAR1(B)
      • Vars
        • S(a);CHECK,N_GUARD::QAR2(B),XS(a)
        • S(c);N_GUARD::QAR1(B),XS(c)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(B);
      • Vars
        • S(c);N_GUARD::QAR1(B),XS(c)
        • S(a);N_GUARD::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(C);
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(c);N_GUARD::QAR1(B),XS(c)
        • S(a);N_GUARD::QAB1(B)
        • S(c);N_GUARD,SBLOCK::R1(D)
        • S(c);N_GUARD::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
  • Actual
    • Q(B);
    • Vars
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(c);N_GUARD::QAR1(B),XS(c)
      • S(a);N_GUARD::QAB1(B)
      • S(c);N_GUARD::QAR1(B)
      • S(c);N_GUARD,SBLOCK::R1(D)
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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).