MESON Chess Problem Database

Problem Display
PID: 163471 (2n5/B4p1K/1NR2P2/4pQ2/3k4/2p1NP2/qp4P1/1b3B2 w - - 0 1)

den Toom, Bas

Probleemblad, 1978

2n5/B4p1K/1NR2P2/4pQ2/3k4/2p1NP2/qp4P1/1b3B2

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe3
      • 2.Sc4#
    • 1...Qe6
      • 2.Sxc8#
    • 1...Bc2
      • 2.Sxc2#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bxf5+
      • 2.Sxf5#
    • 1...Sxb6
      • 2.Bxb6#
    • 1...Sd6
      • 2.Sa4#
    • 1...Se7
      • 2.Sa4#
    • 1...c2
      • 2.Qd3#
      • 2.Qe4#
    • 1...e4
      • 2.Qc5#
  • Tries
    • 1.Sa4+?
      • 1...Sb6
        • 2.Bxb6#
      • 1...Sxa7!
    • 1.Sbd5+?
      • 1...Qxa7
        • 2.Rc4#
      • 1...Sb6
        • 2.Bxb6#
      • 1...Sxa7!
    • 1.Rd6+?
      • 1...Kxe3
        • 2.Sc4#
      • 1...Qd5
        • 2.Sxc8#
      • 1...Sxd6
        • 2.Sa4#
      • 1...Kc5!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Sf5#
      • 1...Bxc2+
        • 2.Sxc2#
      • 1...Kxe3
        • 2.Sd5#
      • 1...Sxb6
        • 2.Bxb6#
      • 1...e4
        • 2.Qxc3#
      • 1...Qe6
        • 2.Sxc8#
      • 1...Sd6
        • 2.Sa4#
      • 1...Se7
        • 2.Sa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(e);S_FLIGHT,XS(C)::B(I)+S(F),DCHECK
    • Q(b);N_GUARD::B(I)+S(F),XS(h)
    • B(a);N_GUARD::S(C),XB(a)
    • B(a);N_GUARD::QAR1(E),XB(a)
    • B(a);CHECK,XQ(E)::S(C),XB(a)
    • S(h);OGATE,P_SPINS(h),XS(F)::B(I),XS(h)
    • S(h);N_GUARD::B(I)+S(F)
    • P(f);N_PINQ(E)::QAB1(E)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::B(I),XS(h)
      • Refutation
        • S(h);XB(I)
    • Try
      • S(F);CHECK
      • Vars
        • Q(b);XB(I)::R1(G)
        • S(h);N_GUARD,P_SPINS(h)::B(I),XS(h)
      • Refutation
        • S(h);XB(I)
    • Try
      • R(G);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(C)::B(I)+S(F),DCHECK
        • Q(b);P_SPINQ(b)::B(I)+S(F),XS(h)
        • S(h);XR(G)::B(I)+S(F)
      • Refutation
        • K(e);P_SPINP(f),S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • S(C)
    • Vars
      • B(a);CHECK,XQ(E)::S(C),XB(a)
      • K(e);S_FLIGHT,XS(C)::B(I)+S(F),DCHECK
      • S(h);OGATE,P_SPINS(h),XS(F)::B(I),XS(h)
      • P(f);N_PINQ(E)::QAB1(E),XP(d)
      • Q(b);N_GUARD::B(I)+S(F),XS(h)
      • S(h);N_GUARD::B(I)+S(F)
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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).