MESON Chess Problem Database

Problem Display
PID: 120723 (8/5p2/K1Rp1P2/3k4/8/5Pn1/2QN4/8 w - - 0 1)

Schlechter, Carl

La Presse, 1895

8/5p2/K1Rp1P2/3k4/8/5Pn1/2QN4/8

#2

6 + 4

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qe4#
    • 1...Sh1
      • 2.Qe4#
    • 1...Se2
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sf5
      • 2.Qe4#
    • 1...Sh5
      • 2.Qe4#
  • Tries
    • 1.Qc5+?
      • 1...Ke6
        • 2.Rxd6#
      • 1...dxc5!
  • Keys
    • 1.Sc4!
      • 1...Kd4
        • 2.Qd2#
      • 1...Kxc6
        • 2.Sb6#
      • 1...Ke6
        • 2.Rxd6#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf5
        • 2.Qe4#
      • 1...Sh5
        • 2.Qe4#

This anticipates 182226(1906)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::R1(E),XP(c)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • S(B);
    • Vars
      • K(b);P-FLIGHT::QAR2(A)
      • K(b);S_FLIGHT,XR(E)::QAR(A)+S(B)
      • K(b);P_SPINP(c),S_FLIGHT::R1(E),XP(c)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(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).