MESON Chess Problem Database

Problem Display
PID: 273215 (B5K1/B7/1P1P1p2/1pn1n3/R1PkP2Q/1PpNp3/1r1RP3/1N5b w - - 0 1)

Segers, Marcel

Springaren, 1989

B5K1/B7/1P1P1p2/1pn1n3/R1PkP2Q/1PpNp3/1r1RP3/1N5b

#2

14 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Scxd3
      • 2.b7#
    • 1...Sxe4
      • 2.b7#
    • 1...Sexd3
      • 2.Qxf6#
    • 1...Sxc4
      • 2.Qxf6#
    • 1...exd2
      • 2.Qf2#
  • Tries
    • 1.Sxb2+?
      • 1...Scd3
        • 2.b7#
      • 1...Sed3
        • 2.Qxf6#
      • 1...exd2
        • 2.Qf2#
      • 1...cxd2!
    • 1.Sxc5+?
      • 1...Kxc5
        • 2.Rd5#
      • 1...Rxd2
        • 2.Se6#
      • 1...cxd2
        • 2.Se6#
      • 1...exd2
        • 2.Qf2#
      • 1...Sd3!
    • 1.Qxf6?
      • threat
        • 2.Qxe5#
      • 1...exd2
        • 2.Qf2#
      • 1...Sd7
        • 2.cxb5#
      • 1...Sxd3!
    • 1.cxb5+?
      • 1...Sc4
        • 2.Rxc4#
        • 2.Qxf6#
      • 1...Sxa4!
    • 1.b7?
      • threat
        • 2.Bxc5#
      • 1...Sg4
        • 2.cxb5#
      • 1...Sd7
        • 2.cxb5#
      • 1...Sxd3!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Sxb5#
      • 1...Rxb3
        • 2.Sc2#
      • 1...Scxd3
        • 2.b7#
      • 1...Sexd3
        • 2.Qxf6#
      • 1...exd2
        • 2.Qf2#
      • 1...bxa4
        • 2.Sb5#
      • 1...bxc4
        • 2.Sb5#
      • 1...b4
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(g);P_SPINS(g),XS(E)::B(L)+P(J)
    • S(g);P_SPINS(g),XP(H)::B(L)+P(J)
    • S(h);OGATEB,P_SPINS(h),XS(E)::QAB(I),XP(i)
    • S(h);OGATEB,P_SPINS(h),XP(G)::QAB(I),XP(i)
    • P(d);OGATEB,XR(B)::QAB(I)
  • Tries
    • Try
      • S(E);CHECK,XR(b)
      • Vars
        • S(g);P_SPINS(g),S_CUTP(c),S_CUTP(d),S_CUTS(h)::B(L)+P(J)
        • S(h);P_SPINS(h),S_CUTP(c),S_CUTP(d),S_CUTS(g)::QAB(I),XP(i)
        • P(d);S_CUTP(c),S_CUTS(g),S_CUTS(h),XR(B)::QAB(I)
      • Refutation
        • P(c);XR(B)
    • Try
      • S(E);CHECK,XS(g)
      • Vars
        • K(e);OGATE,S_FLIGHT,XS(E)::R1(B)
        • R(b);XR(B)::S(E)
        • P(c);XR(B)::S(E)
        • P(d);S_CUTP(c),S_CUTR(b),S_CUTS(h),XR(B)::QAB(I)
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • Q(I);P_PINS(h),XP(i)
      • Threat
        • QAB1(I),XS(h)
      • Vars
        • P(d);OGATEB,XR(B)::QAB(I)
        • S(g);N_GUARD::R(F)+P(G),XP(f)
      • Refutation
        • S(g);N_SPINS(h),P_SPINS(g),XS(E)
    • Try
      • P(G);CHECK,XP(f)
      • Refutation
        • S(g);XR(F)
    • Try
      • P(J);P_PINS(g)
      • Threat
        • B(L),XS(g)
      • Vars
        • S(h);N_GUARD::R(F)+P(G),XP(f)
      • Refutation
        • S(h);N_SPINS(g),P_SPINS(h),XS(E)
  • Actual
    • S(A);
    • Threat
      • S(A),XP(f)
    • Vars
      • R(b);N_GUARD,XP(D)::S(A)
      • S(g);P_SPINS(g),XS(E)::B(L)+P(J)
      • S(h);OGATEB,P_SPINS(h),XS(E)::QAB(I),XP(i)
      • P(d);OGATEB,XR(B)::QAB(I)
      • P(f);XR(F)::S(A)
      • P(f);P_SPINP(f),XP(G)::S(A)
      • P(f);::S(A)
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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).