MESON Chess Problem Database

Problem Display
PID: 22031 (8/Bprp1pb1/8/p6r/6Rn/2k2qQ1/2pN3R/K1Nbn3 w - - 0 1)

Shif, Vladimir Iosifovich

Isvestia VTIK, 1923

8/Bprp1pb1/8/p6r/6Rn/2k2qQ1/2pN3R/K1Nbn3

#2

7 + 13

16265 The Two-move Chess Problem in the Soviet Union 1923-1943 1943
3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Sa2#
    • 1...Rc4
      • 2.Rxc4#
    • 1...Sd3
      • 2.Sa2#
    • 1...d5
      • 2.Qxc7#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Sa2#
        • 2.Qa3#
      • 1...Qe2
        • 2.Sa2#
      • 1...Qg2
        • 2.Sa2#
      • 1...Qf2
        • 2.Sa2#
      • 1...Rb5
        • 2.Sa2#
      • 1...Rhc5
        • 2.Sa2#
      • 1...Rd5
        • 2.Qa3#
      • 1...Rcc5
        • 2.Sa2#
      • 1...Be2
        • 2.Sa2#
      • 1...Bd4
        • 2.Bxd4#
        • 2.Qa3#
        • 2.Qxd4#
      • 1...Bf8
        • 2.Sa2#
        • 2.Bd4#
        • 2.Qd4#
      • 1...Seg2
        • 2.Sa2#
      • 1...Shg2
        • 2.Sa2#
      • 1...Qd5!
    • 1.Qxc7+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Qc6!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Se4#
      • 1...Re5
        • 2.Bd4#
      • 1...Rc4
        • 2.Rxc4#
      • 1...Sd3
        • 2.Sa2#
      • 1...d5
        • 2.Qxc7#
      • 1...f5
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(e);::S(B)
    • R(j);N_GUARD::R1(F),XR(j)
    • S(b);N_SPINQ(e),SBLOCK::S(B)
    • P(k);S_CUTR(h)::QAR(E),XR(j)
  • Tries
    • Try
      • Q(E);N_PINQ(e)
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);::S(B)
        • R(h);::S(B)
        • R(h);::QAR2(E)
        • R(j);::S(B)
        • B(a);::S(B)
        • S(b);::S(B)
        • S(f);::S(B)
      • Refutation
        • Q(e);
    • Try
      • Q(E);CHECK,N_PINQ(e),XR(j)
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAR2(E),XR(h)
      • Refutation
        • Q(e);P_SPINQ(e)
  • Actual
    • R(F);
    • Threat
      • S(C)
    • Vars
      • R(h);S_CUTB(m)::B(G)
      • R(j);N_GUARD::R1(F),XR(j)
      • S(b);N_SPINQ(e),SBLOCK::S(B)
      • P(k);S_CUTR(h)::QAR(E),XR(j)
      • P(l);N_GUARD,S_CUTR(h)::QAB(E),XB(m)
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).