MESON Chess Problem Database

Problem Display
PID: 272623 (6B1/N3BR2/rp6/Q5p1/q1k2NbR/1n1r1n2/PPPpP3/3K4 w - - 0 1)

Ekstrom, Sven Johan Adrian

Schackvarlden, 1941

6B1/N3BR2/rp6/Q5p1/q1k2NbR/1n1r1n2/PPPpP3/3K4

#2

12 + 10

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qb4#
    • 1...Qd7
      • 2.Qb4#
    • 1...Qe8
      • 2.Qb4#
    • 1...Qxa2
      • 2.Qb4#
    • 1...Qb4
      • 2.Qxb4#
    • 1...Rc3
      • 2.Qxc3#
      • 2.Qd5#
    • 1...Re3
      • 2.Qd5#
    • 1...Rd4
      • 2.Qc3#
    • 1...Rd5
      • 2.Qc3#
      • 2.Qxd5#
    • 1...Rd6
      • 2.Qc3#
    • 1...Rd7
      • 2.Qc3#
    • 1...Rd8
      • 2.Qc3#
    • 1...Sbd4
      • 2.Qd5#
      • 2.exd3#
    • 1...Sfd4
      • 2.Qd5#
      • 2.cxd3#
    • 1...gxf4
      • 2.Rxf4#
  • Tries
    • 1.Rf5+?
      • 1...Rd5
        • 2.Qc3#
        • 2.Qxd5#
      • 1...Kd4!
  • Keys
    • 1.Sg2!
      • threat
        • 2.Rf4#
      • 1...Kd4
        • 2.Rxg4#
      • 1...Rd4
        • 2.Se3#
      • 1...Rd5
        • 2.Qc3#
      • 1...Sbd4
        • 2.exd3#
      • 1...Sfd4
        • 2.cxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 10
  • Sets
    • Q(e);N_GUARD::QAR1(H)
    • Q(e);N_GUARD,XP(B)::QAR1(H)
    • Q(e);N_GUARD::QAR1(H),XQ(e)
    • R(c);N_GUARD::QAB1(H)
    • R(c);N_GUARD::QAR1(H)
    • P(h);OGATE,XS(F)::B(L)+R(K),DCHECK,XP(h)
  • Tries
    • Try
      • R(K);CHECK
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • S(F);P_PINB(g)
    • Threat
      • B(L)+R(K),DCHECK
    • Vars
      • K(f);P-FLIGHT,S_CUTR(c),S_CUTS(b),S_CUTS(d)::R(G),XB(g)
      • R(c);N_GUARD,N_SPINB(g),SBLOCK::S(F)
      • R(c);N_GUARD,SBLOCK::QAR1(H)
      • S(b);N_SPINB(g),P_PINP(D),SBLOCK::P(E),XR(c)
      • S(d);N_SPINB(g),P_PINP(E),SBLOCK::P(D),XR(c)
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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).