MESON Chess Problem Database

Problem Display
PID: 189758 (Q1Kb4/2PP4/1B2p2r/P2R1bq1/rp2k1p1/3R2P1/8/1N6 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1912

Q1Kb4/2PP4/1B2p2r/P2R1bq1/rp2k1p1/3R2P1/8/1N6

#2

10 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Sxd2#
    • 1...Qe3
      • 2.Rxe3#
    • 1...Qh4
      • 2.Sd2#
      • 2.Re3#
    • 1...Qf6
      • 2.Sd2#
      • 2.Re3#
    • 1...Qe7
      • 2.Sd2#
      • 2.Re3#
    • 1...Qh5
      • 2.Sd2#
      • 2.Re3#
    • 1...Qg6
      • 2.Sd2#
      • 2.Re3#
    • 1...Qg7
      • 2.Sd2#
      • 2.Re3#
    • 1...Qg8
      • 2.Sd2#
      • 2.Re3#
    • 1...b3
      • 2.Sc3#
    • 1...exd5
      • 2.Qxd5#
    • 1...e5
      • 2.R5d4#
      • 2.Rd6#
  • Keys
    • 1.Rd2!
      • threat
        • 2.Rb5#
      • 1...Kf3
        • 2.R5d3#
      • 1...Qxd2
        • 2.Sxd2#
      • 1...Rxa5
        • 2.Rxa5#
      • 1...exd5
        • 2.Qxd5#
      • 1...Bg6
        • 2.Rxg5#
      • 1...Bh7
        • 2.Rxg5#
      • 1...e5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(f);N_GUARD::S(A),XQ(f)
    • Q(f);N_GUARD::R1(B),XQ(f)
    • P(b);N_GUARD::S(A)
    • P(g);OGATE,P_PINP(H),P_SPINP(g),XR(E)::QAB1(I),XP(g)
  • Actual
    • R(B);
    • Threat
      • QAB(I)+R(E)
    • Vars
      • K(c);S_FLIGHT::QAB(I)+R(E),DCHECK
      • Q(f);XR(B)::S(A),XQ(f)
      • R(a);OGATE,XP(D)::QAB(I)+R(E),XR(a)
      • P(g);OGATE,P_PINP(H),P_SPINP(g),XR(E)::QAB1(I),XP(g)
      • B(e);OGATE::QAB(I)+R(E),XQ(f)
      • P(g);P_PINP(H),SBLOCK::QAB(I)+R(E)
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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).