MESON Chess Problem Database

Problem Display
PID: 84624 (1nNB4/r4p2/q5NR/3Bpk2/2pP3P/Q4P2/pn6/Kb2b1r1 w - - 0 1)

Szwedowski, Leopold Mieczyslaw

Szachy, 1975

1nNB4/r4p2/q5NR/3Bpk2/2pP3P/Q4P2/pn6/Kb2b1r1

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Sd6#
    • 1...Qb7
      • 2.Sd6#
    • 1...Qa4
      • 2.Sd6#
    • 1...Qa5
      • 2.Sd6#
    • 1...Qd6
      • 2.Sxd6#
    • 1...Sc6
      • 2.Sd6#
  • Tries
    • 1.Be4+?
      • 1...Ke6
        • 2.Sf8#
      • 1...Bxe4!
    • 1.Rh5+?
      • 1...Rg5
        • 2.Rxg5#
      • 1...Kxg6!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qxe5#
      • 1...Qxd6
        • 2.Sxd6#
      • 1...exd4
        • 2.Qf4#
        • 2.Qe5#
      • 1...Re7
        • 2.Scxe7#
      • 1...Bg3
        • 2.Rh5#
      • 1...Sd3
        • 2.Be4#
      • 1...Sc6
        • 2.Qf6#
      • 1...Sd7
        • 2.Sce7#
      • 1...e4
        • 2.Qf4#
        • 2.Qe5#
      • 1...f6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(i);N_GUARD::S(I)
    • Q(i);N_GUARD::S(I),XQ(i)
    • S(l);S_CUTQ(i)::S(I)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(h);S_FLIGHT::R(H)+S(G),DCHECK
      • Refutation
        • B(a);XB(F)
    • Try
      • R(H);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::R1(H),XR(c)
      • Refutation
        • K(h);S_FLIGHT,XS(G)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(g)
    • Vars
      • Q(i);XQ(B)::S(I),XQ(i)
      • R(j);N_GUARD::S(I),XR(j)
      • B(b);S_CUTR(c)::R(H)
      • S(e);S_CUTB(a)::B(F)
      • S(l);S_CUTQ(i)::QAR1(B)
      • S(l);S_CUTR(j)::S(I)
      • P(k);N_GUARD::B(F)
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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).