MESON Chess Problem Database

Problem Display
PID: 27569 (8/2Q1p3/4Np2/1Kp2r1R/1nP1k1nR/1N6/1r2PP1b/8 w - - 0 1)

Dombrovskis, Alfreds A

3rd HM., Tidskrift for Schack, 1958

8/2Q1p3/4Np2/1Kp2r1R/1nP1k1nR/1N6/1r2PP1b/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sd2#
    • 1...Rd2
      • 2.Sxd2#
    • 1...Rf3
      • 2.Sbxc5#
      • 2.Sexc5#
    • 1...Rf4
      • 2.Sbxc5#
      • 2.Sexc5#
    • 1...Be5
      • 2.Sbxc5#
    • 1...Sd5
      • 2.Sxc5#
  • Tries
    • 1.Rxg4+?
      • 1...Rf4
        • 2.Sbxc5#
        • 2.Sexc5#
      • 1...Bf4!
    • 1.Qf4+?
      • 1...Rxf4
        • 2.Sbxc5#
        • 2.Sexc5#
      • 1...Bxf4!
  • Keys
    • 1.Qxc5!
      • threat
        • 2.Qxf5#
      • 1...Rxc5+
        • 2.Sbxc5#
      • 1...Rxf2
        • 2.Qd4#
      • 1...Rxh5
        • 2.f3#
      • 1...Sd5
        • 2.Qd4#
      • 1...Rf3
        • 2.Qd4#
      • 1...Rf4
        • 2.Qd4#
      • 1...Rd5
        • 2.f3#
      • 1...Re5
        • 2.f3#
      • 1...Rg5
        • 2.f3#
      • 1...Be5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::S(C)
    • R(a);N_GUARD::S(C),XR(a)
    • B(b);S_CUTR(g)::S(C),XP(f)
    • S(c);P_PINS(C),S_CUTR(g)::S(H),XP(f)
  • Tries
    • Try
      • R(E);CHECK,XS(e)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(I);CHECK,N_PINS(e)
      • Refutation
        • B(b);XQ(I)
  • Actual
    • Q(I);P_SPINQ(I),XP(f)
    • Threat
      • QAB1(I),XR(g)
    • Vars
      • R(g);CHECK,XQ(I)::S(C),XR(g)
      • R(g);N_PINQ(I),XP(B)::QAR1(I)
      • R(g);N_GUARD,XR(G)::P(B)
      • S(c);N_PINQ(I),P_PINS(C)::QAR1(I)
      • R(g);N_PINQ(I)::QAR1(I)
      • R(g);N_PINQ(I),N_SPINS(e)::QAR1(I)
      • R(g);N_GUARD::P(B)
      • B(b);N_PINQ(I),SBLOCK::QAR1(I)
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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).