MESON Chess Problem Database

Problem Display
PID: 203481 (8/1K6/7R/8/4Pkn1/2N3R1/8/Q3N3 w - - 0 1)

Lindquist, Carl Emil Richard

Helsingin Sanomat, 1924

8/1K6/7R/8/4Pkn1/2N3R1/8/Q3N3

#2

7 + 2

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.Qc1#
  • Tries
    • 1.Sd3+?
      • 1...Kg5
        • 2.Qc1#
      • 1...Kxg3!
    • 1.Se2+?
      • 1...Kg5
        • 2.Qf6#
        • 2.Qg7#
        • 2.Qc1#
      • 1...Kxe4!
    • 1.Qd1?
      • 1...Kxg3
        • 2.Qf3#
      • 1...Ke5
        • 2.Qd6#
      • 1...Kg5
        • 2.Qc1#
        • 2.Qd2#
      • 1...Sxh6
        • 2.Qd6#
      • 1...Sf2
        • 2.Qd6#
      • 1...Sh2
        • 2.Qd6#
      • 1...Se3
        • 2.Qd6#
      • 1...Sf6
        • 2.Qd6#
      • 1...Se5!
  • Keys
    • 1.Qa7!
      • 1...Kxg3
        • 2.Se2#
      • 1...Ke5
        • 2.Sd3#
      • 1...Kg5
        • 2.Qe3#
      • 1...Sxh6
        • 2.Qb8#
      • 1...Se5
        • 2.Qe3#
      • 1...Sf2
        • 2.Qb8#
      • 1...Sh2
        • 2.Qb8#
      • 1...Se3
        • 2.Qb8#
      • 1...Sf6
        • 2.Qb8#

This anticipates 76387(1927)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINS(b),S_FLIGHT::QAB(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P_SPINS(b),S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT,XR(D)::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
        • S(b);N_GUARD,XR(F)::QAB(A)
        • S(b);N_GUARD::QAB(A)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT,XR(D)::S(C)
      • K(a);S_FLIGHT::S(B)
      • K(a);P_SPINS(b),S_FLIGHT::QAB(A)
      • S(b);N_GUARD,XR(F)::QAB(A)
      • S(b);N_GUARD,SBLOCK::QAB1(A)
      • S(b);N_GUARD::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).