MESON Chess Problem Database

Problem Display
PID: 179071 (1B6/bqp1Q2K/8/1b3P2/R4P1p/R3Nk2/3Pp2r/1B5N w - - 0 1)

Ellerman, Arnoldo

Magasinet, 1934

1B6/bqp1Q2K/8/1b3P2/R4P1p/R3Nk2/3Pp2r/1B5N

#2

11 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qa6
      • 2.Qe4#
    • 1...Qc8
      • 2.Qe4#
    • 1...Qb6
      • 2.Qe4#
    • 1...Qxb8
      • 2.Qe4#
    • 1...c6
      • 2.Be4#
  • Tries
    • 1.Be4+?
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Kxf4!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qg4#
      • 1...Rxh1
        • 2.Qg2#
      • 1...Bxe3
        • 2.Rxe3#
      • 1...Rg2
        • 2.Qxg2#
      • 1...c5
        • 2.Sc4#
      • 1...c6
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_GUARD,P_PINP(H)::QAB1(I),XQ(g)
    • Q(g);N_GUARD::QAB1(I)
    • Q(g);N_GUARD,XB(K)::QAB1(I)
    • P(h);P_PINQ(I),S_CUTQ(g)::B(A)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • Q(g);OGATE,P_PINP(H),XB(A)::QAB1(I),XQ(g)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(h),XP(G)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • R(b);N_GUARD,XS(B)::QAB1(I)
      • B(f);OGATE,P_SPINB(f),XS(E)::R1(D),XB(f)
      • R(b);N_GUARD::QAB1(I),XR(b)
      • P(h);P_PINQ(I),S_CUTB(f)::R(D)+S(E)
      • P(h);P_PINQ(I),S_CUTQ(g)::B(A)
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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).