MESON Chess Problem Database

Problem Display
PID: 261950 (5RBK/6Bp/8/6p1/4kNp1/1pprN2r/2P1pnP1/1q2Q3 w - - 0 1)

Ellerman, Arnoldo

1st Comm., Problemnoter, 1960

5RBK/6Bp/8/6p1/4kNp1/1pprN2r/2P1pnP1/1q2Q3

#2

9 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe3
      • 2.Qxe2#
    • 1...Rdxe3
      • 2.Bd5#
    • 1...Rhxe3
      • 2.Bxh7#
    • 1...gxf4
      • 2.Re8#
  • Tries
    • 1.Bd5+?
      • 1...Kxe3
        • 2.Qxe2#
      • 1...Rxd5!
    • 1.Bxh7+?
      • 1...Kxe3
        • 2.Qxe2#
      • 1...Rxh7+!
  • Keys
    • 1.Sxe2!
      • threat
        • 2.Re8#
      • 1...Kxe3
        • 2.Sc1#
      • 1...Rdxe3
        • 2.Sxc3#
      • 1...Rhxe3
        • 2.Sg3#
      • 1...Rd5
        • 2.Sxc3#
      • 1...Rd6
        • 2.Sxc3#
      • 1...Rd7
        • 2.Sxc3#
      • 1...Rd8
        • 2.Sxc3#
      • 1...Rh6
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(h);OGATEB,P-FLIGHT,P_SPINP(b),XS(D)::QAR1(A),XP(b)
    • R(f);N_GUARD,SBLOCK,XS(D)::B(H)
    • R(g);N_GUARD,SBLOCK,XS(D)::B(H),XP(k)
    • P(j);SBLOCK,XS(E)::R(G)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINP(b),S_CUTR(f),XS(D)::QAR1(A),XP(b)
      • Refutation
        • R(f);XB(H)
    • Try
      • B(H);CHECK,P_SPINB(H),XP(k)
      • Vars
        • K(h);P-FLIGHT,P_SPINP(b),S_CUTR(g),XS(D)::QAR1(A),XP(b)
      • Refutation
        • R(g);CHECK,XB(H)
  • Actual
    • S(E);XP(b)
    • Threat
      • R(G)
    • Vars
      • K(h);P-FLIGHT,XS(D)::QAR(A)+S(E)
      • R(f);N_GUARD,XS(D)::S(E),XP(e)
      • R(g);N_GUARD,XS(D)::S(E)
      • R(f);N_GUARD::S(E),XP(e)
      • R(g);N_GUARD::S(E)
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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).