MESON Chess Problem Database

Problem Display
PID: 83469 (BB6/3Q1N2/1PK1pp2/2p2b2/2P1kq1R/2p2pP1/6n1/1r1n1Nb1 w - - 0 1)

Ellerman, Arnoldo

2nd Prize, Good Companions (October), 1916

BB6/3Q1N2/1PK1pp2/2p2b2/2P1kq1R/2p2pP1/6n1/1r1n1Nb1

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Kc7#
    • 1...Qxh4
      • 2.Kc7#
    • 1...Rc1
      • 2.Kb5#
    • 1...Rb5
      • 2.Kxb5#
    • 1...Rxb6+
      • 2.Kxb6#
    • 1...Bh2
      • 2.Kxc5#
    • 1...Sb2
      • 2.Kb5#
    • 1...Sf2
      • 2.Kxc5#
    • 1...Se1
      • 2.Rxf4#
    • 1...Se3
      • 2.Rxf4#
    • 1...f2
      • 2.Kxc5#
    • 1...e5
      • 2.Kc7#
      • 2.Qd5#
  • Keys
    • 1.Se5!
      • threat
        • 2.Qd3#
      • 1...Rxb6+
        • 2.Kxb6#
      • 1...fxe5
        • 2.Kc7#
      • 1...Bd4
        • 2.Kd6#
      • 1...Sb2
        • 2.Kb5#
      • 1...Sf2
        • 2.Kxc5#
      • 1...Se1
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(h);::B(I)+K(F)
    • Q(h);N_SPINQ(h),XR(D)::B(I)+K(F)
    • R(a);::B(I)+K(F)
    • R(a);::B(I)+K(F),XR(a)
    • R(a);CHECK,XP(E)::B(I)+K(F),XR(a)
    • B(c);::B(I)+K(F),XP(i)
    • S(b);::B(I)+K(F)
    • S(b);::B(I)+K(F),XP(i)
    • S(d);N_GUARD::R1(D),XQ(h)
    • P(f);::B(I)+K(F),XP(i)
  • Actual
    • S(H);
    • Threat
      • QAB1(G)
    • Vars
      • R(a);CHECK,XP(E)::B(I)+K(F),XR(a)
      • P(l);SBLOCK,XS(H)::B(I)+K(F)
      • B(c);SBLOCK::B(I)+K(F)
      • S(b);::B(I)+K(F)
      • S(b);::B(I)+K(F),XP(i)
      • S(d);N_GUARD::R1(D),XQ(h)
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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).