MESON Chess Problem Database

Problem Display
PID: 139395 (8/N7/1qR3N1/p1Pn3Q/RPk5/1n6/3P4/bB2KbB1 w - - 0 1)

Ellerman, Arnoldo

Caissa, 1943

8/N7/1qR3N1/p1Pn3Q/RPk5/1n6/3P4/bB2KbB1

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Sxe5#
    • 1...Be2
      • 2.Qxe2#
    • 1...Bg2
      • 2.Qe2#
    • 1...Bh3
      • 2.Qe2#
    • 1...Se3
      • 2.b5#
    • 1...Sf4
      • 2.b5#
    • 1...Sf6
      • 2.b5#
    • 1...Sc7
      • 2.b5#
    • 1...Se7
      • 2.b5#
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxf1#
      • 1...Sxd2
        • 2.cxb6#
      • 1...Sxc5
        • 2.Ba2#
      • 1...Sxb4
        • 2.Qf7#
      • 1...Se3
        • 2.b5#
      • 1...Be2
        • 2.Qxe2#
      • 1...Bg2
        • 2.Bd3#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Bd3
        • 2.Bxd3#
        • 2.Qxd3#
      • 1...Bh3
        • 2.Bd3#
        • 2.Qe2#
        • 2.Qd3#
      • 1...Sc1
        • 2.cxb6#
      • 1...Sd4
        • 2.Se5#
      • 1...Sc3
        • 2.Se5#
      • 1...Sf4
        • 2.b5#
      • 1...Sf6
        • 2.b5#
      • 1...Sc7
        • 2.b5#
      • 1...Se7
        • 2.b5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::S(J),XB(a)
    • B(b);N_GUARD::QAB(H),XB(b)
    • B(b);N_GUARD::QAB(H)
    • S(f);N_GUARD::R(E)+P(F)
  • Actual
    • Q(H);
    • Threat
      • QAB(H),XB(b)
    • Vars
      • S(c);N_GUARD,XP(D)::R(I)+P(G),XQ(g)
      • S(c);OGATEB,P_SPINS(c),XP(G)::B(A)
      • S(f);OGATEB,P_SPINS(f),XP(F)::QAB(H)
      • S(f);N_GUARD::R(E)+P(F)
      • B(b);N_GUARD::QAB(H),XB(b)
      • S(c);N_GUARD::R(I)+P(G),XQ(g)
      • S(c);S_CUTB(a)::S(J)
      • S(f);S_CUTB(a)::S(J)
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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).