MESON Chess Problem Database

Problem Display
PID: 109385 (3R4/3pR3/2Pp4/nQN2pr1/P1Pk4/1b1p2P1/3B4/K7 w - - 0 1)

Sim, Malcolm

Canadian Chess Chat, 1954

3R4/3pR3/2Pp4/nQN2pr1/P1Pk4/1b1p2P1/3B4/K7

#2

10 + 8

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc4
      • 2.Sxb3#
    • 1...Sxc6
      • 2.Sxb3#
    • 1...Sb7
      • 2.Sxb3#
    • 1...f4
      • 2.Re4#
    • 1...dxc5
      • 2.Rdxd7#
    • 1...dxc6
      • 2.Rxd6#
  • Tries
    • 1.Se6+?
      • 1...Ke4
        • 2.Qd5#
      • 1...dxe6!
  • Keys
    • 1.Re5!
      • threat
        • 2.Rd5#
      • 1...Kxe5
        • 2.Bc3#
      • 1...Bxc4
        • 2.Qb2#
      • 1...Sxc4
        • 2.Sxb3#
      • 1...dxc5
        • 2.Qxc5#
      • 1...dxe5
        • 2.Rxd7#
      • 1...dxc6
        • 2.Se6#
      • 1...f4
        • 2.Re4#
      • 1...d5
        • 2.Rxd5#

This anticipates 107894(1992)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(d);N_GUARD,XP(E)::S(G),XB(a)
    • S(d);N_GUARD,XP(H)::S(G),XB(a)
    • S(d);N_GUARD::S(G),XB(a)
    • P(e);N_GUARD::R1(I)
    • P(g);OGATEB,P_SPINP(h),XS(G)::R(J),XP(h)
    • P(h);OGATE,P_SPINP(g),XP(H)::R(J),XP(g)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(F)
      • Refutation
        • P(h);P_SPINP(g),XS(G)
  • Actual
    • R(I);
    • Threat
      • R1(I)
    • Vars
      • K(c);S_FLIGHT,XR(I)::B(B)
      • B(a);OGATE,SBLOCK,XP(E)::QAB(F)
      • S(d);N_GUARD,XP(E)::S(G),XB(a)
      • P(g);OGATE,P_SPINP(h),XS(G)::QAB1(F),XP(g)
      • P(g);OGATEB,P_SPINP(h),SBLOCK,XR(I)::R(J),XP(h)
      • P(h);N_GUARD,P_SPINP(g),XP(H)::S(G)
      • P(e);N_GUARD::R1(I)
      • P(g);::R1(I),XP(g)
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).