MESON Chess Problem Database

Problem Display
PID: 255935 (4R3/8/ppQPnK2/1p4p1/1P1k1p1n/N4rp1/1P1P3B/1bNR4 w - - 0 1)

Borisenko, Alexey Ivanovich

Zadachi i Etyudi, 2007

4R3/8/ppQPnK2/1p4p1/1P1k1p1n/N4rp1/1P1P3B/1bNR4

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.bxc3#
    • 1...Rd3
      • 2.Se2#
    • 1...Ba2
      • 2.Sc2#
    • 1...Bc2
      • 2.Sxc2#
    • 1...Bd3
      • 2.Sb3#
    • 1...a5
      • 2.Sxb5#
  • Tries
    • 1.Bg1+?
      • 1...Re3
        • 2.dxe3#
      • 1...Rf2!
  • Keys
    • 1.d3!
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Qxb6#
      • 1...Rxd3
        • 2.Bg1#
      • 1...Bxd3
        • 2.Sc2#
      • 1...Re3
        • 2.Sb3#
      • 1...Sc5
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(b);OGATE::P(C),XR(b)
    • R(b);SBLOCK::S(A)
    • B(a);N_GUARD::S(F)
    • B(a);N_GUARD::S(F),XB(a)
    • B(a);SBLOCK,S_CUTR(b)::S(A)
    • P(i);N_GUARD::S(F),XP(g)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • R(b);OGATE,P_SPINR(b)::R(B)+P(D)DCHECK,XR(b)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • P(D);
    • Threat
      • QAR1(H)
    • Vars
      • K(d);N_GUARD,P_SPINS(k),S_FLIGHT::QAB(H),XP(j)
      • R(b);N_GUARD,P_SPINR(b),XP(D)::B(E)
      • B(a);N_GUARD,P_SPINB(a),XP(D)::S(F)
      • R(b);SBLOCK::S(A)
      • S(k);::S(A)
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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).