MESON Chess Problem Database

Problem Display
PID: 153549 (6bq/3pNn2/8/K1N1P1r1/3p1kpP/2nB2p1/1b4P1/3Q2B1 w - - 0 1)

Ellerman, Arnoldo

Good Companions (March), 1916

6bq/3pNn2/8/K1N1P1r1/3p1kpP/2nB2p1/1b4P1/3Q2B1

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Qf1#
    • 1...Rxe5
      • 2.Sg6#
      • 2.Qf1#
    • 1...Rf5
      • 2.Sg6#
    • 1...Rh5
      • 2.Sg6#
    • 1...Rg6
      • 2.Sxg6#
    • 1...Sxe5
      • 2.Qd2#
  • Tries
    • 1.Bxd4?
      • threat
        • 2.Qf1#
        • 2.Qd2#
      • 1...Qxe5
        • 2.Qf1#
      • 1...Rxe5
        • 2.Sg6#
        • 2.Qf1#
      • 1...Sxd1
        • 2.Sd5#
      • 1...Sxe5
        • 2.Qd2#
      • 1...Bc1
        • 2.Qxc1#
        • 2.Qf1#
      • 1...Sb1
        • 2.Sd5#
        • 2.Qf1#
      • 1...Sd5
        • 2.Sxd5#
        • 2.Qf1#
      • 1...Se4!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Sd3#
      • 1...Kxe5
        • 2.Qxd4#
      • 1...Qxe5
        • 2.Qf1#
      • 1...Rxf5
        • 2.Sg6#
      • 1...Sxe5
        • 2.Qd2#
      • 1...d3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(k);P_PINS(G),SBLOCK,XP(H)::QAR(A)
    • R(g);N_GUARD::S(I)
    • R(g);N_GUARD::S(I),XR(g)
    • S(i);SBLOCK,XP(H)::QAB(A)
  • Tries
    • Try
      • B(B);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(k);P_PINS(G),XP(H)::QAR(A)
        • S(b);N_GUARD,XQ(A)::S(I)
        • S(i);XP(H)::QAB(A)
      • Refutation
        • S(b);
  • Actual
    • B(D);
    • Threat
      • S(G)
    • Vars
      • K(e);S_FLIGHT,XP(H)::QAB1(A),XP(d)
      • Q(k);P_PINS(G),SBLOCK,XP(H)::QAR(A)
      • R(g);N_GUARD,SBLOCK,XB(D)::S(I)
      • S(i);SBLOCK,XP(H)::QAB(A)
      • P(d);::S(G),XP(d)
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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).