MESON Chess Problem Database

Problem Display
PID: 250177 (8/p1KbRp2/1P3Qp1/3pn1N1/1P1k2p1/R1N1n2r/2qP3b/5B2 w - - 0 1)

Levman, Semyon Semyonovich

L'Italia Scacchistica, 1927

8/p1KbRp2/1P3Qp1/3pn1N1/1P1k2p1/R1N1n2r/2qP3b/5B2

#2

10 + 12

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3+
      • 2.dxc3#
    • 1...Rg3
      • 2.Qxe5#
    • 1...Bg1
      • 2.Qxe5#
    • 1...Sc4
      • 2.Se2#
    • 1...g3
      • 2.Sf3#
      • 2.Qxe5#
    • 1...axb6
      • 2.Qxb6#
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qc5#
      • 1...Qxc3+
        • 2.dxc3#
      • 1...Sxf1
        • 2.Qxd5#
      • 1...axb6
        • 2.Qxb6#
      • 1...Sd3
        • 2.Re4#
      • 1...Sf3
        • 2.dxe3#
      • 1...S5c4
        • 2.Se2#
      • 1...Sc6
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(a);CHECK,OGATE,XS(D)::P(B),XQ(a)
    • R(d);S_CUTB(b)::QAB1(H),XS(h)
    • B(b);N_GUARD::QAB1(H),XS(h)
    • S(c);N_PINS(D),SBLOCK::S(D)
    • P(j);OGATE,XP(G)::QAB(H),XP(j)
  • Actual
    • Q(H);N_PINS(h),P_PINP(g)
    • Threat
      • QAB1(H)
    • Vars
      • Q(a);CHECK,OGATE,XS(D)::P(B),XQ(a)
      • S(c);N_GUARD,XB(A)::QAR1(H),XP(g)
      • P(j);OGATE,XP(G)::QAB(H),XP(j)
      • S(h);OGATE,P_PINQ(H)::R1(J)
      • S(h);P_PINQ(H),S_CUTR(d)::P(B),XS(c)
      • S(h);N_PINS(D),P_PINQ(H),SBLOCK::S(D)
      • S(h);N_PINS(D),P_PINQ(H)::S(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).