MESON Chess Problem Database

Problem Display
PID: 250160 (6BQ/BP2K3/pRp3p1/4N3/RN1k1P2/qp3pP1/1PnPrp2/n1r1b3 w - - 0 1)

Shif, Vladimir Iosifovich

3rd Prize, 64 Shakhmatnoe obozrenie, 1927

6BQ/BP2K3/pRp3p1/4N3/RN1k1P2/qp3pP1/1PnPrp2/n1r1b3

#2

13 + 13

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Sd3#
      • 2.Sxa6#
    • 1...Qxb4+
      • 2.Rbxb4#
    • 1...Re4
      • 2.Rxc6#
    • 1...Rxe5+
      • 2.Qxe5#
    • 1...Sxb4
      • 2.Rbxb4#
    • 1...c5
      • 2.Sxc2#
      • 2.Sc6#
  • Tries
    • 1.Rb5+?
      • 1...c5
        • 2.Sxc2#
        • 2.Sc6#
      • 1...Ke4!
    • 1.Rbxa6+?
      • 1...c5
        • 2.Sxc2#
        • 2.Sc6#
      • 1...Ke4!
  • Keys
    • 1.d3!
      • threat
        • 2.Rxc6#
      • 1...Qxb4+
        • 2.Rbxb4#
      • 1...Rxe5+
        • 2.Qxe5#
      • 1...Bxb4+
        • 2.Rbxb4#
      • 1...Ke3
        • 2.Sc4#
      • 1...Kc5
        • 2.Sxa6#
      • 1...Sxb4
        • 2.Rbxb4#
      • 1...Se3
        • 2.Sd7#
      • 1...c5
        • 2.Sxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(g);CHECK,OGATE,P_PINS(G),P_SPINQ(g),XS(E)::B(I)+R(H),DCHECK,XQ(g)
    • R(e);SBLOCK::B(I)+R(H),XP(l)
    • R(e);CHECK,OGATE,P_SPINR(e),XS(G)::QAB1(M),XR(e)
    • S(d);OGATE,P_PINS(G),P_SPINS(d),XS(E)::B(I)+R(H),DCHECK,XS(d)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • K(j);P-FLIGHT
    • Try
      • R(H);CHECK,XP(k)
      • Refutation
        • K(j);P-FLIGHT
  • Actual
    • P(B);
    • Threat
      • B(I)+R(H),XP(l)
    • Vars
      • Q(g);CHECK,OGATE,P_PINS(G),P_SPINQ(g),XS(E)::B(I)+R(H),DCHECK,XQ(g)
      • R(e);CHECK,OGATE,P_SPINR(e),XS(G)::QAB1(M),XR(e)
      • B(c);CHECK,OGATE,P_PINS(G),P_SPINB(c),XS(E)::B(I)+R(H),DCHECK,XB(c)
      • K(j);S_FLIGHT::S(G)
      • K(j);N_PINS(E),P_PINS(G),S_FLIGHT::S(E),XP(k)
      • S(d);OGATE,P_PINS(G),P_SPINS(d),XS(E)::B(I)+R(H),DCHECK,XS(d)
      • S(d);SBLOCK::QAB(M)+S(G)
      • P(l);N_PINS(E),P_PINS(G),SBLOCK::R(D)+S(E),DCHECK,XS(d)
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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).