MESON Chess Problem Database

Problem Display
PID: 147774 (1Qb2N1k/4R2P/3rp1P1/6P1/5R1K/2qr3p/1B6/bB6 w - - 0 1)

Pimenov, ?

Umnov, Evgeny Ivanovich

Shakhmatny Listok, 1920

1Qb2N1k/4R2P/3rp1P1/6P1/5R1K/2qr3p/1B6/bB6

#2

10 + 8

35 L'Italia Scacchistica 1930

SOLUTION

  • SOUND
  • Sets
    • 1...R3d4
      • 2.g7#
    • 1...R6d4
      • 2.Qe5#
      • 2.g7#
    • 1...Bd7
      • 2.Sxd7#
    • 1...e5
      • 2.g7#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Rf8#
        • 2.Re8#
      • 1...Rxe6
        • 2.Rf8#
      • 1...Qd4
        • 2.Re8#
      • 1...Qf6
        • 2.Re8#
      • 1...Rf3
        • 2.Re8#
      • 1...R3d4
        • 2.Re8#
        • 2.g7#
      • 1...R6d4
        • 2.Re8#
        • 2.Qe5#
      • 1...Rd8!
    • 1.Bxc3+?
      • 1...Rxc3
        • 2.g7#
      • 1...R3d4
        • 2.g7#
      • 1...R6d4
        • 2.Qe5#
        • 2.g7#
      • 1...e5
        • 2.g7#
      • 1...Bxc3!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Rf8#
        • 2.Qxc8#
      • 1...Rxd7
        • 2.Rf8#
      • 1...Bxb2
        • 2.Rf8#
      • 1...Qd4
        • 2.Qxc8#
      • 1...Qf6
        • 2.Qxc8#
      • 1...Rf3
        • 2.Qxc8#
      • 1...R3d4
        • 2.g7#
      • 1...R6d4
        • 2.Qe5#
      • 1...Rc6
        • 2.Rf8#
      • 1...e5
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(c);N_SPINQ(b),P_PINR(C),S_CUTQ(b)::P(F)
    • B(g);::QAR(I)+S(J),XB(g)
    • P(f);N_SPINQ(b),S_CUTQ(b)::P(F)
  • Tries
    • Try
      • S(J);P_PINB(g),XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);XS(J)::R(C)
        • Q(b);P_PINR(C)::R(G)
        • Q(b);P_PINP(E)::R(G)
        • R(c);::R(G)
      • Refutation
        • R(e);N_SPINB(g)
    • Try
      • B(B);CHECK,XQ(b)
      • Vars
        • R(c);XB(B)::P(F)
        • R(c);P_PINR(C),P_SPINR(c)::P(F)
        • P(f);P_SPINP(f)::P(F)
      • Refutation
        • B(a);XB(B)
  • Actual
    • S(J);P_PINB(g)
    • Threat
      • DUALS(2)
    • Vars
      • R(e);XS(J)::R(C)
      • B(a);N_SPINQ(b),XB(B)::R(C)
      • Q(b);P_PINR(C)::QAR(I),XB(g)
      • Q(b);P_PINP(E)::QAR(I),XB(g)
      • R(c);::QAR(I),XB(g)
      • R(c);N_SPINQ(b),P_PINR(C),S_CUTQ(b)::P(F)
      • R(e);N_SPINQ(b),OGATE,P_PINR(C)::QAB(I)
      • R(e);::R(C)
      • P(f);N_SPINQ(b)::R(C)
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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).