MESON Chess Problem Database

Problem Display
PID: 86412 (8/8/3N2p1/np4Q1/rk1NP3/nb1RP3/1R3p2/2K2B2 w - - 0 1)

Rudenko, Valentin Fedorovich

2nd Prize, Komsomolska Iskra, 1964

8/8/3N2p1/np4Q1/rk1NP3/nb1RP3/1R3p2/2K2B2

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sc2#
    • 1...Sc2
      • 2.Sxc2#
    • 1...S3c4
      • 2.Sc2#
    • 1...S5c4
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sb7
      • 2.Sc6#
  • Tries
    • 1.Sb7?
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Rdxb3#
        • 2.Qc5#
      • 1...Sxb7!
    • 1.Rb1?
      • 1...Sc2
        • 2.Sxc2#
      • 1...S3c4
        • 2.Sc2#
      • 1...S5c4
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sb7
        • 2.Sc6#
      • 1...Sxb1!
    • 1.Qd5?
      • 1...Sb1
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...S3c4
        • 2.Sc2#
      • 1...S5c4
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sb7
        • 2.Sc6#
      • 1...g5!
    • 1.Qe5?
      • 1...Sb1
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...S3c4
        • 2.Sc2#
      • 1...S5c4
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sb7
        • 2.Sc6#
      • 1...g5!
  • Keys
    • 1.Sc4!
      • 1...Kxc4
        • 2.Rdxb3#
      • 1...S3xc4
        • 2.Sc2#
      • 1...S5xc4
        • 2.Sc6#
      • 1...bxc4
        • 2.Qe7#
      • 1...Sb1
        • 2.Qxb5#
      • 1...Sc2
        • 2.Qxb5#
      • 1...Sc6
        • 2.Rdxb3#
      • 1...Sb7
        • 2.Rdxb3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::S(F)
    • S(b);N_GUARD::S(F),XS(b)
    • S(f);N_GUARD::S(F)
    • S(f);N_GUARD::S(F),XS(f)
  • Tries
    • Try
      • S(I);
      • Threat
        • QAB1(H)
      • Refutation
        • S(f);XS(I)
    • Try
      • R(C);
      • Vars
        • S(b);N_GUARD::S(F),XS(b)
        • S(b);N_GUARD::S(F)
        • S(f);N_GUARD::S(F)
        • S(f);N_GUARD::S(F),XS(f)
      • Refutation
        • S(b);N_SPINB(c),XR(C)
    • Try
      • Q(H);
      • Vars
        • S(b);N_GUARD::S(F)
        • S(b);N_GUARD::S(F),XS(b)
        • S(f);N_GUARD::S(F)
        • S(f);N_GUARD::S(F),XS(f)
      • Refutation
        • P(h);
    • Try
      • Q(H);
      • Vars
        • S(b);N_GUARD::S(F)
        • S(b);N_GUARD::S(F),XS(b)
        • S(f);N_GUARD::S(F)
        • S(f);N_GUARD::S(F),XS(f)
      • Refutation
        • P(h);
  • Actual
    • S(I);
    • Vars
      • K(e);N_SPINB(c),P-FLIGHT,XS(I)::B(B)+R(D),XB(c)
      • S(b);N_GUARD,SBLOCK,XS(I)::S(F)
      • S(f);N_GUARD,SBLOCK,XS(I)::S(F)
      • P(g);SBLOCK,XS(I)::QAB(H)
      • S(b);N_GUARD::QAR1(H),XP(g)
      • S(f);N_GUARD::R1(D),XB(c)
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