MESON Chess Problem Database

Problem Display
PID: 250158 (b2bNN1K/r4pRB/r3p3/2Rnk3/1p3p1B/4p3/1q6/3Q4 w - - 0 1)

Neunivako, Pavel Efimovich

5th HM., 64 Shakhmatnoe obozrenie, 1927

b2bNN1K/r4pRB/r3p3/2Rnk3/1p3p1B/4p3/1q6/3Q4

#2

8 + 12

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Sxd7#
    • 1...Re7
      • 2.Bf6#
    • 1...Bb7
      • 2.Sd7#
    • 1...Ba5
      • 2.Bf6#
    • 1...Bb6
      • 2.Bf6#
    • 1...Bf6
      • 2.Bxf6#
    • 1...Bc7
      • 2.Sd7#
      • 2.Bf6#
    • 1...f3
      • 2.Bg3#
  • Keys
    • 1.Rc4!
      • threat
        • 2.Re4#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qb1
        • 2.Qd4#
      • 1...Qc2
        • 2.Qd4#
      • 1...Qg2
        • 2.Qd4#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sb6
        • 2.Qd6#
      • 1...Sf6
        • 2.Rg5#
      • 1...Sc7
        • 2.Sd7#
      • 1...Se7
        • 2.Bf6#
      • 1...f5
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 7
  • Sets
    • R(i);N_GUARD::S(G),XR(i)
    • R(i);S_CUTB(l)::B(B)
    • B(k);S_CUTR(i)::S(G)
    • B(l);N_GUARD::B(B)
    • B(l);N_GUARD,P_PINR(D)::B(B),XB(l)
    • P(d);OGATEB::B(B)
  • Actual
    • R(C);N_PINS(e)
    • Threat
      • R1(C)
    • Vars
      • Q(a);N_GUARD::QAB1(A),XQ(a)
      • Q(a);N_GUARD::QAB1(A)
      • S(e);S_CUTQ(a)::QAB1(A)
      • S(e);OGATE::QAB1(A)
      • S(e);S_CUTB(l),S_CUTP(j)::R(D)
      • S(e);S_CUTR(i)::S(G)
      • S(e);N_GUARD,S_CUTB(l)::B(B)
      • P(j);N_GUARD,SBLOCK::S(G)
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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).