MESON Chess Problem Database

Problem Display
PID: 137885 (1B6/8/2B2K2/6p1/3R1p1p/4N2p/R4q1k/1r4br w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1926

1B6/8/2B2K2/6p1/3R1p1p/4N2p/R4q1k/1r4br

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Sxf1#
    • 1...Rb3
      • 2.Sf1#
    • 1...Rb4
      • 2.Sf1#
    • 1...Rb5
      • 2.Sf1#
    • 1...Rb6
      • 2.Sf1#
    • 1...Rb7
      • 2.Sf1#
    • 1...Rxb8
      • 2.Sf1#
  • Keys
    • 1.Rxf4!
      • threat
        • 2.Rfxf2#
      • 1...Qb2+
        • 2.Rd4#
      • 1...Kg3
        • 2.Rf3#
      • 1...Qxa2
        • 2.Rf2#
        • 2.Rb4#
      • 1...Rxb8
        • 2.Sf1#
      • 1...gxf4
        • 2.Bxf4#
      • 1...Qc2
        • 2.Rf2#
        • 2.Rb4#
      • 1...Qd2
        • 2.Rf2#
        • 2.Rb4#
      • 1...Qe2
        • 2.Rf2#
        • 2.Rb4#
      • 1...Qg2
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::S(B),XR(a)
    • R(a);N_GUARD::S(B)
    • R(a);N_GUARD,P_PINB(D)::S(B)
    • R(a);N_GUARD,N_SPINP(g),XB(F)::S(B)
  • Actual
    • R(C);P_SPINR(C),XP(g)
    • Threat
      • B(F)+R(C),DCHECK,XQ(d)
    • Vars
      • Q(d);CHECK,N_PINR(C)::B(F)+R(C)
      • K(e);N_SPINQ(d),S_FLIGHT::B(F)+R(C),DCHECK
      • R(a);N_GUARD,XB(F)::S(B)
      • P(i);OGATE,P_SPINP(i),XR(C)::B(F),XP(i)
      • Q(d);N_PINR(C)::B(F)+R(C)
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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).