MESON Chess Problem Database

Problem Display
PID: 244953 (b3R1Bb/5r1p/p6B/5k1K/1Q3PN1/q1r4p/6n1/5N2 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

The Problemist, 1989

b3R1Bb/5r1p/p6B/5k1K/1Q3PN1/q1r4p/6n1/5N2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Qe4#
    • 1...Rf6
      • 2.Re5#
    • 1...Ra7
      • 2.Be6#
    • 1...Rb7
      • 2.Be6#
      • 2.Qe4#
    • 1...Rc7
      • 2.Be6#
    • 1...Rd7
      • 2.Be6#
    • 1...Rg7
      • 2.Be6#
      • 2.Re5#
    • 1...Rf8
      • 2.Be6#
      • 2.Bxh7#
    • 1...Bf3
      • 2.Sg3#
    • 1...Be4
      • 2.Qxe4#
    • 1...Be5
      • 2.Rxe5#
    • 1...Bg7
      • 2.Bxh7#
    • 1...Se3
      • 2.Sg3#
    • 1...Sxf4+
      • 2.Qxf4#
  • Tries
    • 1.Qb1+?
      • 1...Rd3
        • 2.Sg3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Rc2!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Sh6#
      • 1...Sxf4+
        • 2.Qxf4#
      • 1...Rc6
        • 2.Qe4#
      • 1...Rf6
        • 2.Re5#
      • 1...Bf3
        • 2.Sg3#
      • 1...Bg7
        • 2.Bxh7#
      • 1...h6
        • 2.Sxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(c);S_CUTB(i)::QAB1(B)
    • R(g);S_CUTB(j)::R1(G)
    • R(g);OGATE::B(H)
    • B(i);P_PINS(D),S_CUTR(c)::S(A)
    • B(i);N_GUARD::QAB1(B),XB(i)
    • B(j);N_GUARD::R1(G),XB(j)
    • B(j);S_CUTR(g)::B(H),XP(h)
    • S(a);S_CUTR(c)::S(A)
    • S(a);CHECK,OGATE,XP(C)::QAR1(B),XS(a)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(c);P_SPINR(c)::S(A)
        • B(i);N_GUARD,P_SPINB(i)::QAB1(B),XB(i)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • B(F);
    • Threat
      • S(D)
    • Vars
      • S(a);CHECK,OGATE,XP(C)::QAR1(B),XS(a)
      • R(c);S_CUTB(i)::QAB1(B)
      • R(g);S_CUTB(j)::R1(G)
      • B(i);P_PINS(D),S_CUTR(c)::S(A)
      • B(j);S_CUTR(g)::B(H),XP(h)
      • P(h);::S(D),XP(h)
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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).