MESON Chess Problem Database

Problem Display
PID: 9766 (b7/5R2/6p1/4p1P1/2P1kbQ1/RNp5/Kn5P/3N1Bn1 w - - 0 1)

van Dijk, Johannes

1st HM., Philadelphia Sunday Item, 1909

b7/5R2/6p1/4p1P1/2P1kbQ1/RNp5/Kn5P/3N1Bn1

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sh3
      • 2.Qg2#
  • Tries
    • 1.Bg2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Kd3!
    • 1.Qe2+?
      • 1...Be3
        • 2.Sf2#
        • 2.Sxc3#
        • 2.Qxe3#
      • 1...Sxe2!
    • 1.Qf5+?
      • 1...Kf3
        • 2.Sd2#
      • 1...gxf5!
    • 1.Qxg1?
      • threat
        • 2.Qh1#
        • 2.Qg2#
      • 1...Kf3
        • 2.Sd2#
        • 2.Qg2#
      • 1...Sxd1!
  • Keys
    • 1.Qd7!
      • 1...Kf3
        • 2.Sd2#
      • 1...Bxh2
        • 2.Sc5#
      • 1...Bxg5
        • 2.Sc5#
      • 1...Sxd1
        • 2.Qd3#
      • 1...Sxc4
        • 2.Qd3#
      • 1...Bc1
        • 2.Sc5#
      • 1...Bd2
        • 2.Sc5#
      • 1...Be3
        • 2.Sxc3#
      • 1...Bg3
        • 2.Sc5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Se2
        • 2.Bg2#
      • 1...Sf3
        • 2.Sc5#
      • 1...Sh3
        • 2.Bg2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...c2
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 17
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(H)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(H),XS(a)
      • Refutation
        • K(d);N_SPINB(e),S_FLIGHT
    • Try
      • Q(H);CHECK,N_PINB(e)
      • Refutation
        • S(a);XQ(H)
    • Try
      • Q(H);CHECK,N_PINB(e)
      • Vars
        • K(d);P_SPINB(e),S_FLIGHT::S(F)
      • Refutation
        • P(g);XQ(H)
    • Try
      • Q(H);N_PINB(e),XS(a)
      • Threat
        • DUALS(2)
      • Refutation
        • S(b);XS(A)
  • Actual
    • Q(H);N_PINB(e)
    • Vars
      • K(d);P_SPINB(e),S_FLIGHT::S(F)
      • B(e);XP(D)::S(F)
      • B(e);XP(I)::S(F)
      • S(b);N_GUARD,XS(A)::QAB1(H)
      • S(b);N_GUARD,XP(G)::QAB1(H)
      • B(e);::S(F)
      • B(e);SBLOCK::S(A),XP(c)
      • B(h);N_GUARD::QAB1(H),XB(h)
      • B(h);N_GUARD::QAB(H),XB(h)
      • S(a);N_GUARD::B(B)
      • S(a);SBLOCK::S(F)
      • S(b);N_GUARD::QAB1(H),XS(b)
      • S(b);N_GUARD::QAB1(H)
      • P(c);::S(F)
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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).