MESON Chess Problem Database

Problem Display
PID: 139350 (7r/1N2pp2/4k1p1/2pR4/1bp1B1Np/4r3/pB6/Kb2RQ2 w - - 0 1)

Ellerman, Arnoldo

Caissa, 1937

7r/1N2pp2/4k1p1/2pR4/1bp1B1Np/4r3/pB6/Kb2RQ2

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.Sd8#
    • 1...Rh6
      • 2.Sd8#
    • 1...Rh7
      • 2.Sd8#
    • 1...Rd8
      • 2.Sxd8#
    • 1...Bxe1
      • 2.Sxc5#
    • 1...Bd2
      • 2.Sxc5#
    • 1...Bc3
      • 2.Sxc5#
    • 1...Ba5
      • 2.Sxc5#
    • 1...c3
      • 2.Qa6#
    • 1...g5
      • 2.Qf5#
  • Keys
    • 1.Sf6!
      • threat
        • 2.Re5#
      • 1...Rxe4
        • 2.Qh3#
      • 1...exf6
        • 2.Qxf6#
      • 1...Rc3
        • 2.Bd3#
      • 1...Rf3
        • 2.Bf5#
      • 1...Rh5
        • 2.Sd8#
      • 1...Bc3
        • 2.Sxc5#
      • 1...c3
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(l);N_GUARD::S(H)
    • R(l);N_GUARD::S(H),XR(l)
    • B(d);N_GUARD,XR(B)::S(H),XP(g)
    • B(d);N_GUARD::S(H),XP(g)
    • B(d);N_GUARD,P_PINB(D)::S(H),XP(g)
    • P(e);OGATE::QAR(C)
    • P(i);N_GUARD::QAB1(C)
  • Actual
    • S(F);
    • Threat
      • R1(G)
    • Vars
      • R(c);N_GUARD,P_SPINR(c),XB(E)::QAB(C)
      • P(j);OGATE,XS(F)::QAR1(C),XP(j)
      • R(c);OGATEB::R(B)+B(E)
      • R(c);::R(B)+B(E),DCHECK
      • R(l);N_GUARD::S(H)
      • B(d);N_GUARD,P_PINB(D)::S(H),XP(g)
      • P(e);OGATE::QAR(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).