MESON Chess Problem Database

Problem Display
PID: 194104 (8/8/3p1n2/4RN2/6nK/rp1k1p2/2RN4/1Q1b4 w - - 0 1)

Olson, Anders Elis Waldemar

Nordicke Sachove, 1917

8/8/3p1n2/4RN2/6nK/rp1k1p2/2RN4/1Q1b4

#2

6 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxb3#
    • 1...Ra2
      • 2.Qxb3#
    • 1...Ra4
      • 2.Qxb3#
    • 1...Ra5
      • 2.Qxb3#
    • 1...Ra6
      • 2.Qxb3#
    • 1...Ra7
      • 2.Qxb3#
    • 1...Ra8
      • 2.Qxb3#
    • 1...Sf2
      • 2.Re3#
    • 1...Sh2
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...Sh6
      • 2.Re3#
  • Tries
    • 1.Rc3+?
      • 1...Kxd2
        • 2.Rd3#
        • 2.Qd3#
        • 2.Qc1#
      • 1...Kxc3!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qxd1#
      • 1...Bxc2
        • 2.Qf1#
      • 1...Sxe5
        • 2.Sf2#
      • 1...Sxe4
        • 2.Rd5#
      • 1...bxc2
        • 2.Qb5#
      • 1...dxe5
        • 2.Sc5#
      • 1...Ra1
        • 2.Qxb3#
      • 1...Be2
        • 2.Rc1#
        • 2.Rc3#
        • 2.Rcc5#
        • 2.Rc6#
        • 2.Rc7#
        • 2.Rc8#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Se3
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::QAR2(A),XP(c)
    • S(f);N_GUARD::R1(E)
    • S(f);N_GUARD::R1(E),XS(f)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • K(d);P-FLIGHT,XR(B)
  • Actual
    • S(C);
    • Threat
      • QAR2(A),XB(a)
    • Vars
      • B(a);OGATE,P_SPINB(a),SBLOCK,XR(B)::QAB(A)
      • S(f);N_GUARD,XR(E)::S(C)
      • S(h);N_GUARD,SBLOCK,XS(C)::R(E)
      • P(c);OGATE,P_SPINP(c),SBLOCK,XR(B)::QAB(A)
      • P(g);N_GUARD,XR(E)::S(C)
      • R(b);N_GUARD::QAR2(A),XP(c)
      • S(f);N_GUARD::S(C),XS(f)
      • S(f);N_GUARD::S(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).