MESON Chess Problem Database

Problem Display
PID: 139757 (6b1/Q3N2p/2P5/K1R3nr/pn1k1p2/2R1prNp/8/1q2bB2 w - - 0 1)

Ellerman, Arnoldo

Problemas, 1945

6b1/Q3N2p/2P5/K1R3nr/pn1k1p2/2R1prNp/8/1q2bB2

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Sef5#
    • 1...Qe4
      • 2.Se2#
    • 1...Qf5
      • 2.Sexf5#
    • 1...Qa1
      • 2.Sef5#
    • 1...Qc1
      • 2.Sef5#
    • 1...Qd1
      • 2.Sef5#
    • 1...Qb2
      • 2.Sef5#
    • 1...Qb3
      • 2.Sef5#
    • 1...Bxc3
      • 2.Rb5#
      • 2.Rd5#
      • 2.Rf5#
      • 2.Rxg5#
    • 1...Bc4
      • 2.R3xc4#
    • 1...Sc2
      • 2.Sef5#
    • 1...Sd3
      • 2.Sef5#
    • 1...Sxc6+
      • 2.Sxc6#
    • 1...Se4
      • 2.Se2#
    • 1...Se6
      • 2.Rc4#
    • 1...Sf7
      • 2.Rc4#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Qe5#
      • 1...Sxc6+
        • 2.Sxc6#
      • 1...Qe4
        • 2.Se2#
      • 1...Qf5
        • 2.Sexf5#
      • 1...Sd3
        • 2.Sef5#
      • 1...Sd5
        • 2.Rc4#
      • 1...Se4
        • 2.Se2#
      • 1...Se6
        • 2.Rc4#
      • 1...Sf7
        • 2.Rc4#
      • 1...Bd5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qe5#
      • 1...Sxc6+
        • 2.Sxc6#
      • 1...Qe4
        • 2.Se2#
      • 1...Qf5
        • 2.Sexf5#
      • 1...Bd5
        • 2.Qh8#
      • 1...Sd3
        • 2.Sef5#
      • 1...Sd5
        • 2.Rc4#
      • 1...Se4
        • 2.Se2#
      • 1...Se6
        • 2.Rc4#
      • 1...Sf7
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::S(H)
    • Q(a);SBLOCK::S(C)
    • Q(a);N_GUARD,P_PINR(E)::S(H),XQ(a)
    • B(m);N_GUARD::R1(B),XB(m)
    • S(g);P_PINR(B),S_CUTQ(a)::S(H)
    • S(g);CHECK,P_PINR(B),XP(F)::S(H),XS(g)
    • S(j);P_PINR(E),SBLOCK::S(C)
    • S(j);P_PINR(E),S_CUTB(m)::R1(B)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • S(g);CHECK,P_PINR(B),XP(F)::S(H),XS(g)
        • Q(a);SBLOCK::S(C)
        • Q(a);N_GUARD,P_PINR(E)::S(H),XQ(a)
        • S(g);P_PINR(B),S_CUTQ(a)::S(H)
        • S(g);P_PINR(B),S_CUTB(m)::R1(E)
        • S(j);P_PINR(E),SBLOCK::S(C)
        • S(j);P_PINR(E),S_CUTB(m)::R1(B)
      • Refutation
        • B(m);
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • S(g);CHECK,P_PINR(B),XP(F)::S(H),XS(g)
      • Q(a);SBLOCK::S(C)
      • Q(a);N_GUARD,P_PINR(E)::S(H),XQ(a)
      • B(m);OGATE::QAB(G)
      • S(g);P_PINR(B),S_CUTQ(a)::S(H)
      • S(g);P_PINR(B),S_CUTB(m)::R1(E)
      • S(j);P_PINR(E),SBLOCK::S(C)
      • S(j);P_PINR(E),S_CUTB(m)::R1(B)
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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).