MESON Chess Problem Database

Problem Display
PID: 206457 (8/1N6/B1p1K3/PrP3p1/RPk1n1P1/4Q3/4Pn2/8 w - - 0 1)

Sonnenfeld, Pal

Tijdschrift vd NSB, 1925

8/1N6/B1p1K3/PrP3p1/RPk1n1P1/4Q3/4Pn2/8

#2

10 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qd3#
    • 1...Sh1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qd3#
    • 1...Sxg4
      • 2.Qd3#
    • 1...Sd2
      • 2.Sd6#
    • 1...Sg3
      • 2.Sd6#
    • 1...Sxc5+
      • 2.bxc5#
    • 1...Sd6
      • 2.Sxd6#
    • 1...Sf6
      • 2.Sd6#
  • Tries
    • 1.Qb3+?
      • 1...Kd4
        • 2.e3#
      • 1...Kxb3!
  • Keys
    • 1.Ra3!
      • 1...Sxc5+
        • 2.Qxc5#
      • 1...Kxb4
        • 2.Qb3#
      • 1...Sxg4
        • 2.Qxe4#
      • 1...Sd1
        • 2.Qxe4#
      • 1...Sh1
        • 2.Qxe4#
      • 1...Sd3
        • 2.Qxe4#
      • 1...Sh3
        • 2.Qxe4#
      • 1...Sd2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sg3
        • 2.Qc3#
      • 1...Sd6
        • 2.Qc3#
      • 1...Sf6
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 10
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
    • S(a);N_GUARD,XP(E)::QAB1(B)
    • S(c);N_GUARD::S(J)
    • S(c);CHECK,OGATE,XP(G)::R(C)+P(D),XS(c)
    • S(c);N_GUARD::S(J),XS(c)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINR(d),P-FLIGHT::P(A)
      • Refutation
        • K(b);N_SPINR(d),S_FLIGHT,XQ(B)
  • Actual
    • R(C);
    • Vars
      • S(c);CHECK,OGATE,XP(G)::QAR1(B),XS(c)
      • K(b);N_SPINR(d),P-FLIGHT,XP(D)::QAR1(B)
      • S(a);N_GUARD,XP(E)::QAR2(B),XS(c)
      • S(a);N_GUARD::QAR2(B),XS(c)
      • S(c);N_GUARD::QAR1(B)
      • S(c);N_GUARD::QAR1(B),XS(c)
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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).