MESON Chess Problem Database

Problem Display
PID: 109882 (1qN2nB1/PPpP1R2/8/4kP1r/1RK3pN/2P1pP2/5B2/4b3 w - - 0 1)

Witte, Alberto

Agarez MT, 1960

1qN2nB1/PPpP1R2/8/4kP1r/1RK3pN/2P1pP2/5B2/4b3

#2

13 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf5
      • 2.Rxf5#
    • 1...Bd2
      • 2.Bg3#
    • 1...Bxc3
      • 2.Bg3#
    • 1...Se6
      • 2.Sg6#
    • 1...Sg6
      • 2.Sxg6#
    • 1...Sxd7
      • 2.Sg6#
    • 1...Sh7
      • 2.Sg6#
    • 1...c5
      • 2.axb8Q#
      • 2.axb8B#
    • 1...c6
      • 2.axb8Q#
      • 2.axb8B#
  • Tries
    • 1.Rb5+?
      • 1...c5
        • 2.axb8Q#
        • 2.axb8B#
      • 1...Kf4!
  • Keys
    • 1.d8Q!
      • threat
        • 2.Qd4#
      • 1...Kf4
        • 2.Kd5#
      • 1...Qxa7
        • 2.Qxc7#
      • 1...Rxf5
        • 2.Rxf5#
      • 1...Bxc3
        • 2.Bg3#
      • 1...Se6
        • 2.Sg6#
      • 1...Sd7
        • 2.Sg6#
      • 1...c5
        • 2.axb8Q#
        • 2.axb8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(e);OGATE,XP(G)::R1(K),XR(e)
    • B(a);N_GUARD::B(A)
    • B(a);N_GUARD,XP(B)::B(A)
    • S(h);N_GUARD::S(F)
    • S(h);N_GUARD::S(F),XS(h)
    • S(h);N_GUARD,XP(J)::S(F)
    • P(f);::PXQ(g)=Q
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • P(f);P_SPINP(f)::PXQ(g)=Q
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • P(J);
    • Threat
      • QAB1(J)
    • Vars
      • K(d);S_FLIGHT::R(D)+K(E)
      • Q(g);N_GUARD,XP(H)::QAB(J),XP(f)
      • R(e);OGATE,XP(G)::R1(K),XR(e)
      • B(a);N_GUARD,XP(B)::B(A)
      • S(h);N_GUARD::S(F)
      • P(f);::PXQ(g)=Q
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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).