MESON Chess Problem Database

Problem Display
PID: 275840 (8/4n3/1B1n4/r1r2pp1/NP1k1P1b/8/B3K3/1N5Q w - - 0 1)

Stenmark, Hermann

Schackvarlden, 1938

8/4n3/1B1n4/r1r2pp1/NP1k1P1b/8/B3K3/1N5Q

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa4
      • 2.Bxc5#
    • 1...Ra6
      • 2.Bxc5#
    • 1...Ra7
      • 2.Bxc5#
    • 1...Ra8
      • 2.Bxc5#
    • 1...Sb5
      • 2.Bxc5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sc6
      • 2.Qd5#
    • 1...Sg6
      • 2.Qd5#
    • 1...Sc8
      • 2.Qd5#
    • 1...Sg8
      • 2.Qd5#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qd3#
        • 2.Qe3#
      • 1...Bf2
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qd3#
      • 1...gxf4!
    • 1.Qg1+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Bf2!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qa1#
      • 1...Be1
        • 2.Qh8#
      • 1...Sc4
        • 2.Sb3#
      • 1...Se4
        • 2.Sf3#
      • 1...Sb5
        • 2.Bxc5#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(c);N_GUARD,XS(E)::B(H),XR(d)
    • R(c);N_GUARD::B(H),XR(d)
    • S(g);S_CUTR(c)::B(H),XR(d)
    • S(h);N_GUARD::QAR1(B),XS(h)
    • S(h);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAR1(B)
        • S(g);::QAR1(B)
      • Refutation
        • P(f);XP(G)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_SPINR(d),P-FLIGHT::QAR1(B)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • S(A);
    • Threat
      • QAB(B)
    • Vars
      • B(b);OGATE::QAB(B)
      • S(g);SBLOCK::S(A)
      • S(g);S_CUTR(c)::B(H),XR(d)
      • S(h);N_GUARD::QAR1(B),XS(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).