MESON Chess Problem Database

Problem Display
PID: 12162 (2Nq3Q/2pP1p2/P1k2N2/K4p2/1P2n3/2P5/6R1/7B w - - 0 1)

ten Cate, Pieter

SEPA, 1975

2Nq3Q/2pP1p2/P1k2N2/K4p2/1P2n3/2P5/6R1/7B

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qe8
      • 2.dxe8Q#
      • 2.dxe8B#
    • 1...Sd2
      • 2.Rxd2#
    • 1...Sf2
      • 2.Rxf2#
    • 1...Sxc3
      • 2.Rc2#
    • 1...Sg3
      • 2.Rxg3#
    • 1...Sc5
      • 2.b5#
    • 1...Sg5
      • 2.Rxg5#
    • 1...Sd6
      • 2.Sa7#
  • Tries
    • 1.Qxd8?
      • 1...Sxc3
        • 2.Rc2#
      • 1...Sxf6
        • 2.Rg6#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Sg3
        • 2.Rxg3#
      • 1...Sc5
        • 2.b5#
      • 1...Sg5
        • 2.Rxg5#
      • 1...Sd6
        • 2.Sa7#
        • 2.Se7#
      • 1...f4!
  • Keys
    • 1.Qe8!
      • 1...Qxf6
        • 2.d8Q#
        • 2.d8R#
      • 1...Qxd7
        • 2.Qxd7#
      • 1...Qxc8
        • 2.dxc8S#
      • 1...Qxe8
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Sxc3
        • 2.Rc2#
      • 1...Sxf6
        • 2.Rg6#
      • 1...Qe7
        • 2.d8S#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Sg3
        • 2.Rxg3#
      • 1...Sc5
        • 2.b5#
      • 1...Sg5
        • 2.Rxg5#
      • 1...Sd6
        • 2.Sa7#
      • 1...f4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(f);OGATE::PXQ(f)=Q
    • S(a);OGATEB::B(A)+R(B),XS(a)
    • S(a);OGATEB,XP(C)::B(A)+R(B)
    • S(a);SBLOCK::P(D)
    • S(a);SBLOCK::S(I)
  • Tries
    • Try
      • Q(J);XQ(f)
      • Vars
        • S(a);OGATEB,XP(C)::B(A)+R(B)
        • S(a);OGATEB,XS(G)::B(A)+R(B)
        • S(a);OGATEB::B(A)+R(B),XS(a)
        • S(a);SBLOCK::P(D)
      • Refutation
        • P(b);
  • Actual
    • Q(J);
    • Vars
      • Q(f);OGATE,XS(G)::P=Q
      • Q(f);OGATE,P_SPINQ(f),XP(H)::QAB1(J),XQ(f)
      • Q(f);OGATE,XS(I)::PXQ(f)=S
      • Q(f);OGATE,XQ(J)::PXQ(f)=Q
      • S(a);OGATEB,XP(C)::B(A)+R(B)
      • S(a);OGATEB,XS(G)::B(A)+R(B)
      • Q(f);OGATE::P=S
      • S(a);OGATEB::B(A)+R(B),XS(a)
      • S(a);SBLOCK::P(D)
      • S(a);SBLOCK::S(I)
      • P(b);N_GUARD::QAB(J),XS(a)
HTML5 logo

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).