MESON Chess Problem Database

Problem Display
PID: 78145 (3B3b/1p3p2/4p2r/2P1kPn1/RN3N2/4P3/8/KQ3R2 w - - 0 1)

Rudenko, Valentin Fedorovich

1st Prize, Buletin Problemistic, 1975

3B3b/1p3p2/4p2r/2P1kPn1/RN3N2/4P3/8/KQ3R2

#2

10 + 7

23 Die Schwalbe 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Bc7#
    • 1...Bf6
      • 2.Bc7#
    • 1...Se4
      • 2.Sfd3#
    • 1...exf5
      • 2.Sbd3#
    • 1...b5
      • 2.Sc6#
    • 1...b6
      • 2.Sc6#
    • 1...f6
      • 2.Bc7#
  • Tries
    • 1.Sfd5?
      • threat
        • 2.Bc7#
      • 1...exd5
        • 2.Sd3#
      • 1...exf5
        • 2.Qxf5#
      • 1...Se4!
    • 1.Qe4+?
      • 1...Sxe4
        • 2.Sfd3#
      • 1...Kxe4+!
  • Keys
    • 1.Sbd5!
      • threat
        • 2.Bc7#
      • 1...exd5
        • 2.Sd3#
      • 1...exf5
        • 2.Qb2#
      • 1...Se4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(d);SBLOCK::B(J)
    • B(g);SBLOCK::B(J)
    • S(b);SBLOCK::S(G)
    • P(c);SBLOCK,XP(I)::S(F)
    • P(e);N_GUARD::S(F)
    • P(f);SBLOCK::B(J)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(J)
      • Vars
        • P(c);SBLOCK,XS(G)::S(F)
        • P(c);OGATE,XP(I)::QAR1(B),XP(c)
      • Refutation
        • S(b);
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);SBLOCK,XQ(B)::S(G)
      • Refutation
        • K(a);CHECK,P-FLIGHT,XQ(B)
  • Actual
    • S(F);
    • Threat
      • B(J)
    • Vars
      • P(c);SBLOCK,XS(F)::S(G)
      • P(c);SBLOCK,XP(I)::QAB(B)
      • S(b);N_GUARD::QAR1(B),XS(b)
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Developed and maintained by Brian Stephenson.
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