MESON Chess Problem Database

Problem Display
PID: 204422 (2n5/nPN2RpK/1bpk2P1/N7/5P1Q/2R1p2b/4P1Pq/B7 w - - 0 1)

Kubbel, Arvid Ivanovich

5th Prize, 64 Shakhmatnoe obozrenie, 1925

2n5/nPN2RpK/1bpk2P1/N7/5P1Q/2R1p2b/4P1Pq/B7

#2

12 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Qxf4#
    • 1...Bc5
      • 2.Sc4#
    • 1...Sb5
      • 2.Rxc6#
    • 1...Se7
      • 2.Qxe7#
    • 1...c5
      • 2.Rd3#
  • Tries
    • 1.bxc8S+?
      • 1...Sxc8
        • 2.Sb7#
        • 2.Rxc6#
      • 1...Bxc8!
  • Keys
    • 1.f5!
      • 1...Ke5
        • 2.Sc4#
      • 1...Qxg2
        • 2.Qf4#
      • 1...Bxg2
        • 2.Qxh2#
      • 1...Bxf5
        • 2.Qxh2#
      • 1...Bxa5
        • 2.Qd4#
      • 1...Bxc7
        • 2.Qd4#
      • 1...Se7
        • 2.Qxe7#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Qg1
        • 2.Qg3#
        • 2.Qf4#
      • 1...Qg3
        • 2.Qxg3#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qe5
        • 2.Qd8#
      • 1...Qh1
        • 2.Qg3#
        • 2.Qf4#
      • 1...Bg4
        • 2.Qxh2#
      • 1...Bc5
        • 2.Sc4#
      • 1...Sb5
        • 2.Rxc6#
      • 1...c5
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE,XP(E)::QAB(F),XQ(a)
    • B(d);SBLOCK::S(G)
    • S(g);N_GUARD::R1(D),XP(e)
    • S(i);N_GUARD::QAB1(F),XS(i)
    • P(e);SBLOCK,S_CUTB(d)::R(D)
  • Tries
    • Try
      • P(I);CHECK,XS(i)
      • Refutation
        • B(c);P_PINQ(F),XS(I)
  • Actual
    • P(E);
    • Vars
      • K(f);S_FLIGHT::S(G)
      • Q(a);N_GUARD,XP(C)::QAB(F)
      • B(c);OGATE,P_PINQ(F),XP(C)::QAB(F),XQ(a)
      • B(c);OGATE,P_PINP(H),P_PINQ(F),XP(E)::QAB(F),XQ(a)
      • B(d);N_GUARD,XS(G)::QAR2(F)
      • B(d);N_GUARD,XS(J)::QAR2(F)
      • S(i);N_GUARD::QAB1(F),XS(i)
      • B(d);N_GUARD::QAR2(F),XB(d)
      • Q(a);N_GUARD::QAB(F),XQ(a)
      • Q(a);SBLOCK::QAR2(F)
      • B(c);OGATE,P_PINQ(F)::QAB(F),XQ(a)
      • B(d);SBLOCK::S(G)
      • S(g);N_GUARD::R1(D),XP(e)
      • P(e);SBLOCK,S_CUTB(d)::R(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).