MESON Chess Problem Database

Problem Display
PID: 204449 (2nr3q/2prpp2/1p6/1Q6/3kP2R/1p4n1/bP1B2P1/K1N5 w - - 0 1)

van Dijk, Johannes

Der Tijd, 1925

2nr3q/2prpp2/1p6/1Q6/3kP2R/1p4n1/bP1B2P1/K1N5

#2

8 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qb4#
    • 1...Bb1
      • 2.Sxb3#
    • 1...Sf1
      • 2.Se2#
    • 1...Sh1
      • 2.Se2#
    • 1...Se2
      • 2.Sxe2#
    • 1...Sxe4
      • 2.Se2#
    • 1...Sf5
      • 2.Se2#
    • 1...Sh5
      • 2.Se2#
    • 1...Sd6
      • 2.Qd5#
    • 1...e5
      • 2.Qb4#
  • Tries
    • 1.e5+?
      • 1...Se4
        • 2.Se2#
      • 1...Qxh4!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Qb4#
      • 1...Kxe4
        • 2.Bh6#
      • 1...Sxe4
        • 2.Se2#
      • 1...Sd6
        • 2.Qd5#
      • 1...c5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(l);SBLOCK::QAR2(H)
    • B(a);N_GUARD::S(B),XP(b)
    • S(c);N_GUARD::S(B)
    • S(c);N_GUARD::S(B),XS(c)
    • S(c);N_GUARD,P_SPINS(c),XP(F)::S(B)
    • S(j);S_CUTR(g)::QAR1(H)
    • P(h);SBLOCK::QAR2(H)
  • Tries
    • Try
      • P(F);CHECK
      • Vars
        • S(c);P_SPINS(c)::S(B)
      • Refutation
        • Q(l);XR(G)
  • Actual
    • B(D);
    • Threat
      • QAR2(H)
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_PINP(C),XP(F)::R(G)+B(D)
      • S(c);N_GUARD,SBLOCK,XP(F)::S(B)
      • S(j);S_CUTR(g)::QAR1(H)
      • P(f);SBLOCK::QAR1(H)
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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).