MESON Chess Problem Database

Problem Display
PID: 103844 (8/3N2Kb/r1n5/3p2p1/1Qnpk1P1/3p3R/3P1R2/1Nr5 w - - 0 1)

Nanning, Alexander Karel

De Tijd, 1949

8/3N2Kb/r1n5/3p2p1/1Qnpk1P1/3p3R/3P1R2/1Nr5

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Re3#
    • 1...Sxd2
      • 2.Sxd2#
    • 1...Sa3
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...S4a5
      • 2.Re3#
    • 1...S4e5
      • 2.Sf6#
      • 2.Re3#
    • 1...Sb6
      • 2.Re3#
    • 1...Sd6
      • 2.Re3#
    • 1...S6e5
      • 2.Sc5#
  • Tries
    • 1.Qe7+?
      • 1...S4e5
        • 2.Sf6#
      • 1...S6e5
        • 2.Sc5#
      • 1...Sxe7!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qf3#
      • 1...Sxd2
        • 2.Sxd2#
      • 1...Bf5
        • 2.Qxf5#
      • 1...S4e5
        • 2.Sf6#
      • 1...S6e5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • S(c);N_GUARD,P_SPINP(d)::R1(D)
    • S(c);P_SPINP(d),XP(B)::S(A),XS(c)
    • S(c);N_GUARD,P_SPINP(d)::R1(D),XS(c)
    • S(i);SBLOCK::S(G)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • S(c);P_SPINS(c)::S(G)
        • S(i);P_SPINS(i)::S(G)
      • Refutation
        • S(i);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • S(c);XP(B)::S(A),XS(c)
      • B(j);N_GUARD::QAB1(E),XB(j)
      • S(c);SBLOCK::S(G)
      • S(i);SBLOCK::S(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).