MESON Chess Problem Database

Problem Display
PID: 250178 (8/3QP2b/3P1b2/2Pkr2p/R4PNq/1P1pB2p/5N2/1K1R4 w - - 0 1)

Ovchinnikov, Valentin N

64 Shakhmatnoe obozrenie, 1927

8/3QP2b/3P1b2/2Pkr2p/R4PNq/1P1pB2p/5N2/1K1R4

#2

12 + 8

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf2
      • 2.Sxf6#
    • 1...Qg3
      • 2.Sxf6#
    • 1...Rg5
      • 2.Sxf6#
    • 1...Re6
      • 2.Qb7#
    • 1...Rxe7
      • 2.dxe7#
    • 1...Bxe7
      • 2.dxe7#
    • 1...Bg8
      • 2.Rxd3#
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Rd4#
      • 1...Bxd3+
        • 2.Rxd3#
      • 1...Rxe3
        • 2.Sxe3#
      • 1...Rxe7
        • 2.dxe7#
      • 1...Re4
        • 2.Sb4#
      • 1...Rf5
        • 2.Sde5#
      • 1...Rg5
        • 2.Sxf6#
      • 1...Re6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD,XS(C)::S(H),XB(g)
    • Q(c);N_GUARD::S(H),XB(g)
    • R(e);S_CUTQ(c)::S(H),XB(g)
    • R(e);SBLOCK::QAB(K)
    • R(e);OGATE,XP(L)::QAR(K)+P(J),XR(e)
    • B(g);OGATE,XP(L)::QAR(K)+P(J),XB(g)
    • B(h);N_GUARD::R(B),XP(a)
  • Actual
    • S(C);P_SPINS(C),XP(a)
    • Threat
      • R1(F)
    • Vars
      • B(h);CHECK,OGATE,P_SPINB(h),XS(C)::R(B),XB(h)
      • R(e);XB(E)::S(H),XR(e)
      • R(e);OGATE,XP(L)::QAR(K)+P(J),XR(e)
      • R(e);N_PINS(C),SBLOCK::R(B)+S(C),DCHECK
      • R(e);N_PINS(C)::R(B)+S(C)
      • R(e);S_CUTQ(c)::S(H),XB(g)
      • R(e);SBLOCK::QAB(K)
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).