MESON Chess Problem Database

Problem Display
PID: 263753 (6K1/5pN1/5Np1/R7/pRP2k1P/r1n4Q/pB4n1/q2b2r1 w - - 0 1)

Levman, Semyon Semyonovich

Tijdschrift vd NSB, 1930

6K1/5pN1/5Np1/R7/pRP2k1P/r1n4Q/pB4n1/q2b2r1

#2

9 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.c5#
    • 1...Se4
      • 2.Sd5#
    • 1...Sb5
      • 2.cxb5#
    • 1...Sd5
      • 2.cxd5#
    • 1...g5
      • 2.Rf5#
  • Tries
    • 1.Sgh5+?
      • 1...gxh5
        • 2.Rf5#
      • 1...Bxh5!
    • 1.Bc1+?
      • 1...Se3
        • 2.Bxe3#
        • 2.Qxe3#
      • 1...Qxc1!
    • 1.c5+?
      • 1...Se4
        • 2.Sd5#
        • 2.Rxe4#
      • 1...Ke5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qg3#
      • 1...Sxh4
        • 2.Qe3#
      • 1...gxf5
        • 2.Rxf5#
      • 1...Se1
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb1
        • 2.c5#
      • 1...Se2
        • 2.Qg4#
      • 1...Se4
        • 2.Sd5#
      • 1...Sb5
        • 2.cxb5#
      • 1...Sd5
        • 2.cxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(g);N_GUARD::R(C)+P(D)
    • S(g);N_GUARD,SBLOCK::S(G)
    • S(g);OGATE::R(C)+P(D),XS(g)
    • P(j);N_GUARD::R1(F)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • P(j);XS(H)::R1(F)
      • Refutation
        • B(b);XS(H)
    • Try
      • B(A);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • P(D);CHECK
      • Refutation
        • K(i);P_SPINS(g),S_FLIGHT
  • Actual
    • S(H);
    • Threat
      • QAB1(B)
    • Vars
      • S(e);N_GUARD,XP(E)::QAB1(B)
      • P(j);OGATE,XS(H)::R1(F),XP(j)
      • S(e);N_GUARD::QAB1(B)
      • S(e);N_GUARD::QAB1(B),XS(e)
      • S(g);N_GUARD::R(C)+P(D)
      • S(g);S_CUTB(b)::QAR1(B)
      • S(g);N_GUARD,SBLOCK::S(G)
      • S(g);OGATE::R(C)+P(D),XS(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).