MESON Chess Problem Database

Problem Display
PID: 36809 (4n1B1/3p4/2rN2QK/4kP1R/1P5B/2P1N1P1/bn1qR3/3rb3 w - - 0 1)

Ellerman, Arnoldo

1st HM., BCF 010. Ty., 1932-1933

4n1B1/3p4/2rN2QK/4kP1R/1P5B/2P1N1P1/bn1qR3/3rb3

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3+
      • 2.Rxe3#
    • 1...Qc2
      • 2.Sxc2#
      • 2.Sec4#
      • 2.Sg4#
    • 1...Qd3
      • 2.Sec4#
      • 2.Sg4#
    • 1...Qd4
      • 2.Sec4#
      • 2.Sg4#
    • 1...Qd5
      • 2.Sec4#
      • 2.Sg4#
      • 2.Sxd5#
    • 1...Qxd6
      • 2.Sxd1#
      • 2.Sf1#
      • 2.Sc2#
      • 2.Sg2#
      • 2.Sc4#
      • 2.Sg4#
      • 2.Sd5#
      • 2.f6#
    • 1...Rxd6
      • 2.f6#
    • 1...Bxg3
      • 2.Bxg3#
      • 2.Qxg3#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sc7
      • 2.Qf6#
    • 1...Sg7
      • 2.Qf6#
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qf4#
      • 1...Qxd6+
        • 2.f6#
      • 1...Rxd6+
        • 2.f6#
      • 1...Kxd6
        • 2.Qf4#
      • 1...Bxg3
        • 2.Qxg3#
      • 1...Qd4
        • 2.Sc4#
      • 1...Rc4
        • 2.Sf7#
      • 1...Sd3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(e);CHECK,OGATE,P_SPINQ(e),XS(C)::R(A),XQ(e)
    • R(g);P_PINQ(J),SBLOCK,XS(I)::R(H)+P(G)
    • S(i);N_GUARD::QAB1(J),XS(i)
    • S(i);N_GUARD::QAB1(J)
  • Actual
    • Q(J);
    • Threat
      • QAB1(J)
    • Vars
      • Q(e);CHECK,N_PINS(C),SBLOCK,XS(I)::R(H)+P(G)
      • R(g);CHECK,SBLOCK,XS(I)::R(H)+P(G)
      • K(f);S_FLIGHT,XS(I)::QAB(J)
      • B(b);OGATE,XP(D)::QAB(J),XB(b)
      • Q(e);N_PINS(C),P_PINS(I)::R(A)+S(C),DCHECK
      • R(g);::S(I)
      • S(d);S_CUTQ(e)::QAB1(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).