MESON Chess Problem Database

Problem Display
PID: 32856 (8/8/2N5/K1p2b2/1pk5/Q4B2/R3r3/2bN4 w - - 0 1)

Lebedev, Aleksandr N

De Problemist, 1929

8/8/2N5/K1p2b2/1pk5/Q4B2/R3r3/2bN4

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Se3#
    • 1...Bd2
      • 2.Sb2#
  • Tries
    • 1.Bxe2+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Kd5!
    • 1.Qxb4+?
      • 1...Kd3
        • 2.Bxe2#
        • 2.Qc3#
        • 2.Qb3#
      • 1...cxb4!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Bd5#
      • 1...Rxd2
        • 2.Se3#
      • 1...Bxd2
        • 2.Sb2#
      • 1...Re4
        • 2.Qd3#
      • 1...Re5
        • 2.Sxe5#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Be4
        • 2.Se5#
      • 1...Be6
        • 2.Bxe2#
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,S_CUTB(a)::S(A)
    • B(a);N_GUARD,S_CUTR(b)::S(A)
  • Tries
    • Try
      • B(D);CHECK,XR(b)
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAB1(C),XB(f)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(C);CHECK,XP(c)
      • Refutation
        • P(e);XQ(C)
  • Actual
    • R(B);
    • Threat
      • B(D)
    • Vars
      • R(b);N_GUARD,XR(B)::S(A)
      • B(a);N_GUARD,XR(B)::S(A)
      • R(b);S_CUTB(f)::QAB1(C)
      • R(b);N_GUARD::S(F),XR(b)
      • B(f);N_GUARD::QAB1(C),XB(f)
      • B(f);S_CUTR(b)::S(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).