MESON Chess Problem Database

Problem Display
PID: 148550 (3R4/1N2Q3/1r2qpB1/1b1P1N2/3pk1K1/2r2R2/7B/8 w - - 0 1)

Levman, Semyon Semyonovich

3rd Prize, Grantham Journal, 1929

3R4/1N2Q3/1r2qpB1/1b1P1N2/3pk1K1/2r2R2/7B/8

#2

9 + 7

35 L'Italia Scacchistica 1930

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Sg3#
    • 1...Ra3
      • 2.Sc5#
    • 1...Rb3
      • 2.Sc5#
    • 1...Rd3
      • 2.Sc5#
    • 1...Re3
      • 2.Sc5#
    • 1...Rxf3
      • 2.Sc5#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Rxb7
      • 2.Qxe6#
    • 1...Bc4
      • 2.Sc5#
    • 1...Bc6
      • 2.Qxe6#
    • 1...d3
      • 2.Re3#
  • Tries
    • 1.Re3+?
      • 1...Rxe3
        • 2.Sc5#
      • 1...dxe3!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qxd4#
      • 1...Qxf5+
        • 2.Bxf5#
      • 1...Qxd5
        • 2.Sfd6#
      • 1...Qe5
        • 2.Sg3#
      • 1...Rd3
        • 2.Sc5#
      • 1...Rc4
        • 2.Qe1#
      • 1...Bc4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(f);N_PINS(E)::B(F)+S(E),DCHECK
    • R(a);N_GUARD::S(G)
    • R(a);N_GUARD,XR(B)::S(G)
    • R(a);N_GUARD::S(G),XR(a)
    • R(e);N_GUARD,XS(G)::QAR2(H),XQ(f)
    • B(d);S_CUTR(a)::S(G)
    • B(d);S_CUTR(e)::QAR2(H),XQ(f)
    • P(b);N_GUARD,S_CUTR(a)::R1(B)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • R(a);XR(B)::S(G)
      • Refutation
        • P(b);XR(B)
  • Actual
    • Q(H);N_PINQ(f),P_PINP(b)
    • Threat
      • QAR1(H),XP(b)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINQ(f),XS(E)::B(F),XQ(f)
      • Q(f);N_PINS(E),SBLOCK,XP(D)::B(F)+S(E),DCHECK
      • Q(f);N_PINS(E),SBLOCK::B(F)+S(E),DCHECK
      • R(a);N_GUARD::S(G)
      • R(a);N_SPINP(b),OGATE::QAR(H)
      • B(d);N_SPINP(b),S_CUTR(a)::S(G)
HTML5 logo

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).