MESON Chess Problem Database

Problem Display
PID: 233547 (3Nr3/Kb3Q2/2pp2p1/R1nnk2N/3p3R/3P1pp1/8/4r3 w - - 0 1)

Viksna, Kristaps

Freie Presse, 1973

3Nr3/Kb3Q2/2pp2p1/R1nnk2N/3p3R/3P1pp1/8/4r3

#2

7 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Sxc6#
    • 1...Bc8
      • 2.Sxc6#
    • 1...Sb3
      • 2.Qf4#
      • 2.Qf6#
    • 1...Sxd3
      • 2.Qf6#
    • 1...Sa4
      • 2.Qf4#
      • 2.Qf6#
    • 1...Se4
      • 2.Qf4#
    • 1...Sa6
      • 2.Qf4#
      • 2.Qf6#
    • 1...Se6
      • 2.Qf6#
    • 1...Sd7
      • 2.Qf4#
    • 1...Se3
      • 2.Re4#
    • 1...Se7
      • 2.Qe6#
    • 1...gxh5
      • 2.Rxh5#
  • Tries
    • 1.Re4+?
      • 1...Sxe4
        • 2.Qf4#
      • 1...Rxe4!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Rg5#
      • 1...Sxd3
        • 2.Qf6#
      • 1...Bc8
        • 2.Sxc6#
      • 1...Se4
        • 2.Qf4#
      • 1...Se6
        • 2.Qf6#
      • 1...Se3
        • 2.Re4#
      • 1...Se7
        • 2.Qe6#
      • 1...g5
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(k);N_GUARD::S(G),XP(h)
    • S(e);P_SPINS(f),XP(A)::QAB1(F)
    • S(e);P_SPINS(f)::QAB1(F)
    • S(f);P_SPINS(e),S_CUTR(a)::R1(B)
    • S(f);P_SPINS(e),S_CUTR(l)::QAR1(F)
    • P(j);OGATE,XS(D)::R(B),XP(j)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • S(e);P_SPINS(f),XR(B)::QAB1(F)
      • Refutation
        • R(a);XR(B)
  • Actual
    • R(B);
    • Threat
      • R(B)
    • Vars
      • S(e);P_SPINS(f),XP(A)::QAB1(F)
      • B(k);N_GUARD::S(G),XP(h)
      • S(e);P_SPINS(f)::QAB1(F)
      • S(f);P_SPINS(e),S_CUTR(a)::R1(B)
      • S(f);P_SPINS(e),S_CUTR(l)::QAR1(F)
      • P(j);::R(B),XP(j)
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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).