MESON Chess Problem Database

Problem Display
PID: 156026 (2Q5/4r3/3pNp1q/1Ppk3r/1bN1nR2/1P2Knp1/3pPp2/3R1b1B w - - 0 1)

Schirdewan, Udo

Nederlandse Bond van Probleemvrienden, 1932

2Q5/4r3/3pNp1q/1Ppk3r/1bN1nR2/1P2Knp1/3pPp2/3R1b1B

#2

10 + 14

1577 Jaarboek 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4+
      • 2.Sxf4#
    • 1...Re5
      • 2.Sb6#
    • 1...Rxe6
      • 2.Qb7#
      • 2.Qc6#
      • 2.Qa8#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Re8
      • 2.Sc7#
    • 1...Se1
      • 2.Bxe4#
    • 1...Sg1
      • 2.Bxe4#
    • 1...Sh2
      • 2.Bxe4#
    • 1...Sd4
      • 2.Bxe4#
    • 1...Sh4
      • 2.Bxe4#
    • 1...Se5
      • 2.Sb6#
      • 2.Bxe4#
    • 1...Sfg5
      • 2.Rf5#
    • 1...Sc3
      • 2.Rxd2#
    • 1...Seg5
      • 2.Rf5#
  • Tries
    • 1.Qa8+?
      • 1...Rb7
        • 2.Sc7#
      • 1...Kxe6!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Sc7#
      • 1...Qxf4+
        • 2.Sxf4#
      • 1...Rxe6
        • 2.Qa8#
      • 1...Rc7
        • 2.Sxc7#
      • 1...Sc3
        • 2.Rxd2#
      • 1...Seg5
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(m);CHECK,XR(G)::S(I),XQ(m)
    • R(j);SBLOCK::S(F)
    • R(n);N_GUARD::S(I),XR(n)
    • R(n);N_GUARD::S(I)
    • S(d);OGATE,P_SPINS(g)::B(B),XS(g)
    • S(d);N_SPINP(b),OGATE,P_SPINS(g)::B(B),XS(g)
    • S(d);N_PINR(G),P_SPINS(g)::R(G)
    • S(g);N_GUARD,P_PINS(I),P_SPINS(d),S_CUTB(f)::R(A),XP(b)
    • S(g);N_PINR(G),P_PINS(I),P_SPINS(d)::R(G)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • R(n);P_SPINR(n)::S(I)
      • Refutation
        • K(i);N_SPINP(b),S_FLIGHT,XS(I)
  • Actual
    • Q(J);
    • Threat
      • QAB(J)+S(I),DCHECK
    • Vars
      • Q(m);CHECK,XR(G)::QAB(J)+S(I),DCHECK,XQ(m)
      • R(n);N_GUARD,P_SPINR(n),SBLOCK,XS(I)::QAB(J)
      • R(n);::QAB(J)+S(I),DCHECK,XR(n)
      • S(g);N_GUARD,P_PINS(I),P_SPINS(d),S_CUTB(f)::R(A),XP(b)
      • S(g);N_PINR(G),P_PINS(I),P_SPINS(d)::R(G)
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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).