MESON Chess Problem Database

Problem Display
PID: 203360 (2N5/2q3p1/prpP4/B1k5/P4p1r/7p/B2Q3K/b7 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1924

2N5/2q3p1/prpP4/B1k5/P4p1r/7p/B2Q3K/b7

#2

7 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Bxb6#
      • 2.Qxd6#
    • 1...Qd7
      • 2.Bxb6#
    • 1...Qe7
      • 2.Bxb6#
    • 1...Qf7
      • 2.Bxb6#
    • 1...Rb4
      • 2.Bxb4#
      • 2.Qxb4#
    • 1...Bc3
      • 2.Qxc3#
  • Tries
    • 1.Qc1+?
      • 1...Bc3
        • 2.Qxc3#
      • 1...Kd4!
    • 1.Qc2+?
      • 1...Bc3
        • 2.Qxc3#
      • 1...Kd4!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qf2#
        • 2.Qd4#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Qxc8
        • 2.Qd4#
      • 1...Bxc3
        • 2.Qxc3#
      • 1...Rb3
        • 2.Qd4#
      • 1...Qe7
        • 2.Qd4#
      • 1...Rb2
        • 2.Bd4#
      • 1...Rb4
        • 2.Bxb4#
      • 1...f3
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(i);N_GUARD::B(E),XR(g)
    • B(a);N_GUARD::QAR2(B),XB(a)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(B),XB(a)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR2(B),XB(a)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • B(E);
    • Threat
      • DUALS(2)
    • Vars
      • Q(i);OGATE,XP(F)::QAB1(B),XQ(i)
      • Q(i);XS(G)::QAB1(B)
      • B(a);OGATE,XB(E)::QAR2(B),XB(a)
      • R(g);::QAB1(B)
      • Q(i);::QAB1(B)
      • R(g);P_PINQ(B),S_CUTB(a)::B(E)
      • R(g);N_GUARD::B(E),XR(g)
      • P(c);OGATE,P_PINP(F)::QAR(B)
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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).