MESON Chess Problem Database

Problem Display
PID: 214055 (B7/1n2p2N/4p3/4k3/1P3p2/2K2p1P/1PQ2P2/3R4 w - - 0 1)

Saarenheimo, Eero Johannes

Suomen Shakki, 1955

B7/1n2p2N/4p3/4k3/1P3p2/2K2p1P/1PQ2P2/3R4

#2

9 + 6

15148 Sadier Collection 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Qe4#
    • 1...Sd8
      • 2.Qe4#
  • Tries
    • 1.Kb3?
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sd8
        • 2.Qe4#
        • 2.Qc5#
      • 1...Sa5+!
    • 1.Qg6?
      • 1...Sc5
        • 2.Qh5#
        • 2.Qg5#
      • 1...Sa5
        • 2.Qe4#
        • 2.Qh5#
        • 2.Qg5#
      • 1...Sd8
        • 2.Qe4#
        • 2.Qh5#
        • 2.Qg5#
      • 1...Sd6!
  • Keys
    • 1.Kd3!
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Kd5
        • 2.Qc5#
      • 1...Kf5
        • 2.Kd4#
      • 1...Kd6
        • 2.Ke4#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sd8
        • 2.Qc5#

Anticipated by 107134(1943)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(e);::QAR1(C)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • S(e);CHECK,N_GUARD::QAR2(C),XS(e)
        • S(e);N_GUARD::QAR2(C)
      • Refutation
        • S(e);CHECK
    • Try
      • Q(C);
      • Refutation
        • S(e);
  • Actual
    • K(E);P-FLIGHT
    • Vars
      • S(e);CHECK,N_GUARD::QAR2(C),XS(e)
      • K(c);P-FLIGHT,P_SPINS(e)::QAR1(C)
      • K(c);P-FLIGHT::QAB(C)+K(E)
      • K(c);S_FLIGHT::R(A)+K(E)
      • S(e);N_GUARD::QAR2(C)
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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).