MESON Chess Problem Database

Problem Display
PID: 194057 (4Q3/6r1/1r6/4B1p1/Rn6/3k4/2R5/1B1N1nK1 w - - 0 1)

Lindgren, Frithiof

Nordicke, 1917

4Q3/6r1/1r6/4B1p1/Rn6/3k4/2R5/1B1N1nK1

#2

7 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Sf2#
    • 1...Sa2
      • 2.Rb2#
      • 2.Rd4#
    • 1...Sd5
      • 2.Rb2#
      • 2.Rd4#
    • 1...Sa6
      • 2.Rb2#
      • 2.Rd4#
    • 1...Sc6
      • 2.Rb2#
  • Tries
    • 1.Rf2+?
      • 1...Sc2
        • 2.Bxc2#
        • 2.Rd4#
      • 1...Kc4!
    • 1.Rg2+?
      • 1...Sc2
        • 2.Bxc2#
        • 2.Rd4#
      • 1...Kc4!
    • 1.Rh2+?
      • 1...Sc2
        • 2.Bxc2#
        • 2.Rd4#
      • 1...Kc4!
    • 1.Qb5+?
      • 1...Ke4
        • 2.Rf2#
        • 2.Rc3#
      • 1...Rxb5!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qe2#
      • 1...Ke4
        • 2.Rc5#
      • 1...Sxc2
        • 2.Rd4#
      • 1...Sd2
        • 2.Rc3#
      • 1...Se3
        • 2.Sf2#
      • 1...Sg3
        • 2.Qf3#
      • 1...g4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(a);SBLOCK::S(B)
    • S(c);N_GUARD::B(A)+R(D)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • K(b);P_SPINS(c),S_FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • K(b);P_SPINS(c),S_FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • K(b);P_SPINS(c),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • R(e);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • K(b);P_SPINS(c),S_FLIGHT::B(A)+R(D)
      • S(c);OGATE,P_SPINS(c),XR(D)::R1(E)
      • S(a);SBLOCK::B(A)+R(D),DCHECK
      • S(a);SBLOCK::S(B)
      • S(a);N_GUARD::QAR2(G)
      • P(d);OGATE::QAB(G)
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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).