MESON Chess Problem Database

Problem Display
PID: 146786 (7K/3pR3/1p6/1B1k4/3npp2/Bp6/b2QNrp1/b7 w - - 0 1)

Kriuckov, Sergey Petrovic

3rd Prize, 64 Shakhmatnoe obozrenie, 1926/II

7K/3pR3/1p6/1B1k4/3npp2/Bp6/b2QNrp1/b7

#2

6 + 11

56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Sxc3#
    • 1...b2
      • 2.Sc3#
      • 2.Qxd4#
    • 1...f3
      • 2.Sf4#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qc4#
        • 2.Qxe4#
      • 1...Rxe2
        • 2.Qc4#
      • 1...Bb1
        • 2.Qc4#
      • 1...b2
        • 2.Sc3#
        • 2.Qxe4#
        • 2.Qxd4#
      • 1...e3
        • 2.Qc4#
        • 2.Qe4#
      • 1...exd3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qc4#
      • 1...Bxc3
        • 2.Sxc3#
      • 1...Sxe2
        • 2.Re5#
      • 1...Sxb5
        • 2.Re5#
      • 1...Sc2
        • 2.Re5#
      • 1...Sf3
        • 2.Sxf4#
      • 1...Sf5
        • 2.Re5#
      • 1...Sc6
        • 2.Bc4#
      • 1...Se6
        • 2.Rxd7#
      • 1...b2
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::S(B),XB(a)
    • P(h);S_CUTR(c)::S(B)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XS(B)::QAB1(A)
        • B(b);::QAB1(A)
      • Refutation
        • P(g);N_SPINS(f),XQ(A)
  • Actual
    • Q(A);N_PINS(f)
    • Threat
      • QAB1(A)
    • Vars
      • B(a);XQ(A)::S(B),XB(a)
      • S(f);P_PINQ(A),XS(B)::R1(E)
      • S(f);P_PINQ(A),XB(D)::R1(E)
      • S(f);P_PINQ(A)::R1(E)
      • S(f);P_PINQ(A),S_CUTR(c)::S(B),XP(h)
      • S(f);P_PINQ(A),SBLOCK::B(D)
      • S(f);P_PINQ(A),SBLOCK::R(E),XP(k)
      • P(e);S_CUTB(a)::QAR1(A),XS(f)
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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).