MESON Chess Problem Database

Problem Display
PID: 90689 (1Q6/1Bq1p1B1/8/r2p3r/p2Nk1P1/b1pRP3/4K2p/8 w - - 0 1)

Eichhorn, Gerhadt

Die Schwalbe, 1960

1Q6/1Bq1p1B1/8/r2p3r/p2Nk1P1/b1pRP3/4K2p/8

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qb6
      • 2.Qf4#
    • 1...Qd8
      • 2.Qf4#
    • 1...Qc4
      • 2.Qf4#
    • 1...Qc5
      • 2.Qf4#
    • 1...Qc6
      • 2.Qf4#
    • 1...Qxb7
      • 2.Qf4#
    • 1...Qd7
      • 2.Qf4#
    • 1...Qc8
      • 2.Qf4#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Rd4#
      • 1...Qb6
        • 2.Sxc3#
        • 2.Qf4#
      • 1...Qc4
        • 2.Qf4#
      • 1...Qc5
        • 2.Qf4#
      • 1...Bc5
        • 2.Sxc3#
      • 1...e5
        • 2.Bxd5#
      • 1...Qe5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rd4#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qb6
        • 2.Sg3#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Qc4
        • 2.Sg3#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Qc5
        • 2.Sg3#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Bc5
        • 2.Bxd5#
      • 1...e5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(i);OGATE::QAR1(H),XQ(i)
    • Q(i);OGATE::QAR1(H)
    • Q(i);OGATE,P_PINR(B)::QAR1(H)
    • Q(i);N_SPINP(g),OGATE::QAR1(H)
    • Q(i);N_SPINP(g),OGATE,XB(F)::QAR1(H)
  • Tries
    • Try
      • S(D);
      • Threat
        • R1(B)
      • Vars
        • Q(i);OGATE,P_PINR(B)::QAR1(H)
        • Q(i);OGATE::QAR1(H)
        • B(b);S_CUTQ(i)::S(D),XP(c)
        • P(j);S_CUTR(h)::B(F),XP(g)
      • Refutation
        • Q(i);
  • Actual
    • S(D);
    • Threat
      • R1(B)
    • Vars
      • Q(i);OGATE::QAR1(H),XQ(i)
      • B(b);S_CUTR(f)::B(F),XP(g)
      • P(j);S_CUTQ(i)::S(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).