MESON Chess Problem Database

Problem Display
PID: 42448 (6Q1/4p1KB/1p1NP3/bPpnk1p1/3RnN2/5bpP/3R4/2B5 w - - 0 1)

Mees, Wouter Jacob Gregorius

1st Prize, Schakend Nederland, 1962

6Q1/4p1KB/1p1NP3/bPpnk1p1/3RnN2/5bpP/3R4/2B5

#2

11 + 10

254 Stella Polaris 1966
3747 FIDE Album (1962-1964) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qb8#
    • 1...Sf2
      • 2.Sc4#
      • 2.Sf7#
    • 1...Sec3
      • 2.Sc4#
      • 2.Sf7#
    • 1...Sef6
      • 2.Sc4#
      • 2.Sf7#
    • 1...Sdc3
      • 2.Sg6#
    • 1...Se3
      • 2.Sg6#
    • 1...Sb4
      • 2.Sg6#
    • 1...Sxf4
      • 2.Sc4#
    • 1...Sdf6
      • 2.Sg6#
    • 1...Sc7
      • 2.Sg6#
    • 1...gxf4
      • 2.Sc4#
      • 2.Rxd5#
  • Tries
    • 1.Rxe4+?
      • 1...Kxd6
        • 2.Qb8#
        • 2.Qd8#
      • 1...Bxe4!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Rxd5#
      • 1...Kxf4
        • 2.Rxd5#
      • 1...Kxd6
        • 2.Qb8#
      • 1...Sxd2
        • 2.Sf7#
      • 1...Sxd6
        • 2.Sd3#
      • 1...Sxb4
        • 2.Sg6#
      • 1...Sxf4
        • 2.Sc4#
      • 1...gxf4
        • 2.Sc4#
      • 1...Sf2
        • 2.Sf7#
      • 1...Sec3
        • 2.Sf7#
      • 1...Sef6
        • 2.Sf7#
      • 1...Sdc3
        • 2.Sg6#
      • 1...Se3
        • 2.Sg6#
      • 1...Sdf6
        • 2.Sg6#
      • 1...Sc7
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(g);OGATEB,P_SPINS(f),S_FLIGHT,XS(G)::QAB(K)
    • S(f);::S(E)
    • S(f);SBLOCK,XS(E)::S(G)
  • Tries
    • Try
      • R(D);CHECK,XS(c)
      • Refutation
        • B(a);XR(D)
  • Actual
    • R(D);
    • Threat
      • R1(B),XS(f)
    • Vars
      • K(g);P_SPINS(c),S_FLIGHT,XS(E)::B(A)+R(B),XS(f)
      • K(g);OGATEB,P_SPINS(f),S_FLIGHT,XS(G)::QAB(K)
      • S(c);XR(B)::S(G)
      • S(c);SBLOCK,XS(G)::S(E)
      • S(f);XR(D)::S(E)
      • S(f);SBLOCK,XS(E)::S(G)
      • P(h);SBLOCK,XS(E)::S(G)
      • S(c);::S(G)
      • S(f);::S(E)
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).