MESON Chess Problem Database

Problem Display
PID: 228995 (BqNnK3/pNr2p2/prk5/n2p4/P7/3P4/7B/5Q2 w - - 0 1)

Persson, Ragnar

Eskilstuna Kuriren, 1926

BqNnK3/pNr2p2/prk5/n2p4/P7/3P4/7B/5Q2

#2

8 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re7+
      • 2.Sxe7#
    • 1...Saxb7
      • 2.Qc1#
    • 1...d4
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf3#
  • Keys
    • 1.d4!
      • threat
        • 2.Sxa5#
        • 2.Sxd8#
      • 1...Re7+
        • 2.Sxe7#
      • 1...Qxb7
        • 2.Sxa7#
      • 1...Rbxb7
        • 2.Qxa6#
      • 1...Rcxb7
        • 2.Se7#
      • 1...Saxb7
        • 2.Qc1#
      • 1...Sdxb7
        • 2.Qf6#
      • 1...Sb3
        • 2.Sa5#
        • 2.Sxd8#
      • 1...Sc4
        • 2.Sa5#
        • 2.Sxd8#
      • 1...Se6
        • 2.Sxa5#
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(g);CHECK,N_GUARD::S(G),XR(g)
    • S(a);N_GUARD,P_SPINS(a),XS(E)::QAR(A)
  • Actual
    • P(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(g);CHECK,N_GUARD::S(G),XR(g)
      • Q(i);N_GUARD,P_SPINQ(i),XS(E)::S(G),XP(f)
      • R(d);OGATEB,P_SPINR(d),XS(E)::QAR2(A),XP(c)
      • R(g);N_GUARD,P_SPINR(g),XS(E)::S(G)
      • S(a);N_GUARD,P_SPINS(a),XS(E)::QAR(A)
      • S(j);N_GUARD,P_PINS(G),P_SPINS(j),XS(E)::QAR(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).