MESON Chess Problem Database

Problem Display
PID: 139126 (8/p2K4/Qb2BP2/3N3R/1p2kpP1/n4n1R/2pr4/B2N4 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

4th HM., BCF 122. Ty., 1969-1970

8/p2K4/Qb2BP2/3N3R/1p2kpP1/n4n1R/2pr4/B2N4

#2

10 + 9

3713 Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sf2#
      • 2.Qe2#
    • 1...Rxd5+
      • 2.Bxd5#
    • 1...Se1
      • 2.Re5#
    • 1...Sg1
      • 2.Re5#
    • 1...Sh2
      • 2.Re5#
    • 1...Sh4
      • 2.Re5#
    • 1...Se5+
      • 2.Rxe5#
  • Tries
    • 1.Qe2+?
      • 1...Be3
        • 2.Sf2#
      • 1...Rxe2!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Bf5#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Se5+
        • 2.Rxe5#
      • 1...Kd3
        • 2.Sxf4#
      • 1...Sd4
        • 2.S5c3#
      • 1...Rd4
        • 2.Sf2#
      • 1...Bd4
        • 2.Sxb4#
      • 1...Sh4
        • 2.Re5#

Anticipated by 45480(1945-1946)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(b);CHECK,OGATE,XS(E)::B(H),XR(b)
    • S(d);N_GUARD::R1(F)
    • S(d);CHECK,N_GUARD::R1(F),XS(d)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • B(h);P_SPINB(h)::S(B)
      • Refutation
        • R(b);N_PINS(E),XQ(G)
  • Actual
    • Q(G);
    • Threat
      • B(H)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XS(E)::QAB1(G),XR(b)
      • S(d);CHECK,N_GUARD::R1(F),XS(d)
      • K(f);N_PINS(E),P_SPINS(d),S_FLIGHT::S(E),XP(g)
      • S(d);N_PINS(E),SBLOCK::QAB(G)+S(E),DCHECK
      • R(b);N_GUARD,S_CUTB(h)::S(B)
      • B(h);N_PINS(E)::QAB(G)+S(E),XP(e)
      • S(d);N_GUARD::R1(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).