MESON Chess Problem Database

Problem Display
PID: 273160 (3r1B2/3pn2K/3N3R/1p1k4/Q3pP2/1n2P2B/3Nq3/1bR5 w - - 0 1)

Ekstrom, Sven Johan Adrian

Schackvarlden, 1940

3r1B2/3pn2K/3N3R/1p1k4/Q3pP2/1n2P2B/3Nq3/1bR5

#2

10 + 9

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qxb3#
    • 1...Qg4
      • 2.Qxb3#
    • 1...Qh5
      • 2.Qxb3#
    • 1...Qe1
      • 2.Qxb3#
    • 1...Qxd2
      • 2.Qxb3#
    • 1...Qf2
      • 2.Qxb3#
    • 1...Qg2
      • 2.Qxb3#
    • 1...Qh2
      • 2.Qxb3#
    • 1...Ba2
      • 2.Qxe4#
    • 1...Sa1
      • 2.Qd4#
    • 1...Sxd2
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sa5
      • 2.Qd4#
    • 1...Sc8
      • 2.Qa8#
  • Tries
    • 1.Be6+?
      • 1...Kxd6
        • 2.Bxb3#
        • 2.Bf7#
        • 2.Bg8#
        • 2.Qa6#
      • 1...dxe6!
    • 1.Qxb5+?
      • 1...Sc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...Qxb5!
  • Keys
    • 1.S6xe4!
      • threat
        • 2.Rd6#
      • 1...Bxe4+
        • 2.Qxe4#
      • 1...Qh5
        • 2.Qxb3#
      • 1...Sf5
        • 2.Sc3#
      • 1...Sg6
        • 2.Sf6#
      • 1...Sc8
        • 2.Qa8#
      • 1...d6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • Q(b);N_GUARD::QAB(E),XS(c)
    • Q(b);N_GUARD,P_PINR(H)::QAB(E),XS(c)
    • Q(b);N_GUARD,XS(B)::QAB(E),XS(c)
    • B(a);N_GUARD::QAB1(E),XP(d)
    • S(c);N_GUARD::QAR1(E)
    • S(c);N_GUARD,XS(B)::QAR1(E)
    • S(c);N_GUARD::QAR1(E),XS(c)
    • S(h);N_GUARD,S_CUTR(i)::QAB(E)
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • P(g);XB(D)
    • Try
      • Q(E);CHECK,XP(e)
      • Refutation
        • Q(b);XQ(E)
  • Actual
    • S(G);P_SPINS(G),XP(d)
    • Threat
      • R1(H)
    • Vars
      • B(a);CHECK,OGATE,XS(G)::QAB1(E),XB(a)
      • Q(b);N_GUARD,P_PINR(H)::QAB(E),XS(c)
      • S(h);N_PINS(G)::S(G)
      • S(h);N_GUARD,S_CUTR(i)::QAB(E)
      • P(g);N_GUARD::B(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).