MESON Chess Problem Database

Problem Display
PID: 171278 (8/2N1Bp2/2b2Rp1/Rq2k1pn/pP4P1/2K1p3/1Q6/1B6 w - - 0 1)

Archakov, Vladimir Mikhailovich

Sahs (Latvia), 1961

8/2N1Bp2/2b2Rp1/Rq2k1pn/pP4P1/2K1p3/1Q6/1B6

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Kd3#
      • 2.Kc4#
    • 1...Qc5+
      • 2.Kd3#
    • 1...Sxf6
      • 2.Qh2#
    • 1...Sg7
      • 2.Qh2#
    • 1...e2
      • 2.Kd2#
  • Tries
    • 1.Rxb5+?
      • 1...Bd5
        • 2.Kd3#
        • 2.Rxd5#
      • 1...Bxb5!
    • 1.Qh2+?
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Bd4#
      • 1...Qd3+
        • 2.Kxd3#
      • 1...Qc4+
        • 2.Kxc4#
      • 1...Qxb4+
        • 2.Kxb4#
      • 1...Qxc5+
        • 2.Kd3#
      • 1...Kxf6
        • 2.Kc2#
      • 1...Sxf6
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(c);CHECK::QAB(B)+K(C)
    • S(f);N_GUARD,XR(G)::QAB(B)
    • S(f);N_GUARD::QAB(B)
    • P(a);::QAB(B)+K(C)
  • Tries
    • Try
      • R(F);CHECK,XQ(c)
      • Refutation
        • B(g);XR(F)
    • Try
      • Q(B);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB(B),XS(f)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • B(I);N_PINQ(c)
    • Threat
      • B(I)
    • Vars
      • Q(c);CHECK::QAB(B)+K(C),XQ(c)
      • Q(c);CHECK,XP(D)::QAB(B)+K(C),XQ(c)
      • Q(c);CHECK,P_SPINQ(c),XB(I)::QAB(B)+K(C)
      • K(d);S_FLIGHT,XR(G)::QAB(B)+K(C)
      • S(f);N_GUARD,SBLOCK,XR(G)::QAB(B)
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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).