MESON Chess Problem Database

Problem Display
PID: 229062 (1K4b1/2N1R3/6p1/R5Np/1B1k1n2/1P3r1p/2P2P1b/4r2q w - - 0 1)

Levman, Semyon Semyonovich

Comm., Midweek Sports Referee, 1926

1K4b1/2N1R3/6p1/R5Np/1B1k1n2/1P3r1p/2P2P1b/4r2q

#2

9 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sxf3#
    • 1...Qg1
      • 2.Sxf3#
    • 1...Ra1
      • 2.Re4#
    • 1...Rb1
      • 2.Re4#
    • 1...Rc1
      • 2.Re4#
    • 1...Rd1
      • 2.Re4#
    • 1...Rf1
      • 2.Re4#
    • 1...Rg1
      • 2.Re4#
    • 1...Re4
      • 2.Rxe4#
    • 1...Bd5
      • 2.Sb5#
    • 1...Se2
      • 2.Re4#
    • 1...Sg2
      • 2.Sxf3#
    • 1...Sd3
      • 2.c3#
    • 1...Se6
      • 2.Rd5#
  • Tries
    • 1.Rd5+?
      • 1...Bxd5
        • 2.Sb5#
      • 1...Sxd5!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Sb5#
      • 1...Qf1
        • 2.Sxf3#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Se2
        • 2.Re4#
      • 1...Sg2
        • 2.Sxf3#
      • 1...Sd3
        • 2.c3#
      • 1...Sd5
        • 2.Rc4#
      • 1...Se6
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::S(F),XR(d)
    • R(a);N_GUARD::R1(H)
    • R(a);N_GUARD::R1(H),XR(a)
    • B(j);SBLOCK::S(G)
    • S(g);P_PINS(G),S_CUTR(a)::R1(H)
    • S(g);P_PINS(G),S_CUTQ(b)::S(F),XR(d)
    • S(g);P_PINS(G),SBLOCK,S_CUTR(d)::P(A)
    • S(g);N_GUARD,P_PINS(G),S_CUTB(j)::R1(E)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • B(j);SBLOCK,XR(E)::S(G)
      • Refutation
        • S(g);P_PINS(G),XR(E)
  • Actual
    • R(E);
    • Threat
      • S(G)
    • Vars
      • Q(b);N_GUARD::S(F),XR(d)
      • B(j);N_GUARD::R1(E),XB(j)
      • S(g);P_PINS(G),S_CUTR(a)::R1(H)
      • S(g);P_PINS(G),S_CUTQ(b)::S(F),XR(d)
      • S(g);P_PINS(G),SBLOCK,S_CUTR(d)::P(A)
      • S(g);P_PINS(G),S_CUTB(j)::R1(E)
      • S(g);N_GUARD,P_PINS(G),S_CUTB(j)::R1(E)
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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).