MESON Chess Problem Database

Problem Display
PID: 257245 (1B3R2/1q3p1p/2Brp3/r2nN2R/1p3k2/5p1K/1Qn2P1b/2N5 w - - 0 1)

Rietveld, Johannes Jacob

Probleemblad, 1947

1B3R2/1q3p1p/2Brp3/r2nN2R/1p3k2/5p1K/1Qn2P1b/2N5

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qd4#
    • 1...Se1
      • 2.Qd4#
    • 1...Sa3
      • 2.Qd4#
    • 1...Sce3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sc3
      • 2.Sed3#
    • 1...Sde3
      • 2.Sed3#
    • 1...Sb6
      • 2.Sed3#
    • 1...Sf6
      • 2.Sed3#
    • 1...Sc7
      • 2.Rxf7#
    • 1...Se7
      • 2.Sed3#
  • Tries
    • 1.Se2+?
      • 1...Ke4
        • 2.Qxc2#
      • 1...fxe2!
    • 1.Sg6+?
      • 1...hxg6
        • 2.Qe5#
      • 1...Ke4!
    • 1.Rg8?
      • threat
        • 2.Rg4#
      • 1...Sce3
        • 2.Qd4#
      • 1...Sde3
        • 2.Sed3#
      • 1...Sf6
        • 2.Sed3#
      • 1...f5
        • 2.Rh4#
      • 1...Ke4!
  • Keys
    • 1.Sxf7!
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Sg5#
      • 1...Sc7
        • 2.Se5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc3
        • 2.Sd3#
      • 1...Sde3
        • 2.Sd3#
      • 1...Sb6
        • 2.Sd3#
      • 1...Sf6
        • 2.Sd3#
      • 1...Se7
        • 2.Sd3#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAR2(B)
    • S(a);N_GUARD::QAR2(B),XS(a)
    • S(g);::S(E)
    • S(g);N_SPINP(k)::S(E)
    • S(g);N_GUARD,S_CUTQ(j)::R(I),XP(k)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(e);N_SPINP(k),P-FLIGHT,P_SPINS(g),S_CUTP(c)::QAB(B),XS(a)
      • Refutation
        • P(c);XS(A)
    • Try
      • S(E);CHECK,P_PINR(h)
      • Vars
        • P(l);XS(E)::QAB1(B)
      • Refutation
        • K(e);N_SPINP(k),N_SPINR(h),P-FLIGHT,P_SPINS(g)
    • Try
      • R(I);N_PINP(k)
      • Threat
        • R1(I)
      • Vars
        • S(a);N_GUARD::QAR2(B)
        • S(g);::S(E)
        • P(k);SBLOCK::R(F)
      • Refutation
        • K(e);P-FLIGHT,P_SPINS(g)
  • Actual
    • S(E);P_PINR(h),XP(k)
    • Threat
      • QAB1(B)
    • Vars
      • K(e);N_SPINR(h),P-FLIGHT,P_SPINS(g),S_CUTQ(j)::S(E)
      • S(g);N_GUARD,N_SPINR(h),S_CUTQ(j)::R(I)+S(E)
      • S(a);N_GUARD::QAR2(B),XS(a)
      • S(g);::S(A)
      • P(i);N_SPINR(h)::QAB1(B),XP(i)
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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).