MESON Chess Problem Database

Problem Display
PID: 15901 (4b3/b2N3n/3pB3/2P5/R1pPkp2/7R/2P2P2/Q1K5 w - - 0 1)

Rychkov, Vladimir Nikolaevich

3rd HM., 64 Shakhmatnoe obozrenie, 1989

4b3/b2N3n/3pB3/2P5/R1pPkp2/7R/2P2P2/Q1K5

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Sf6#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sf8
      • 2.Sf6#
    • 1...c3
      • 2.d5#
    • 1...f3
      • 2.Rh4#
  • Tries
    • 1.Rxc4?
      • threat
        • 2.d5#
      • 1...Bxc5
        • 2.dxc5#
      • 1...d5!
    • 1.Qc3?
      • threat
        • 2.f3#
      • 1...f3
        • 2.Rh4#
        • 2.Qe3#
      • 1...Sg5
        • 2.Sf6#
      • 1...Bh5!
  • Keys
    • 1.Qb1!
      • threat
        • 2.c3#
      • 1...Kxd4
        • 2.Rxc4#
        • 2.c3#
      • 1...f3
        • 2.Rh4#
      • 1...c3
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • S(f);N_GUARD::S(J)
    • S(f);N_GUARD::S(J),XS(f)
    • P(a);::R(F)+P(G)
    • P(c);OGATEB,SBLOCK::R(E)
  • Tries
    • Try
      • R(F);XP(a)
      • Threat
        • R(F)+P(G)
      • Vars
        • B(e);OGATE,XP(H)::R(F)+P(G),XB(e)
      • Refutation
        • P(d);
    • Try
      • Q(A);
      • Threat
        • P(D)
      • Vars
        • S(f);N_GUARD::S(J)
      • Refutation
        • B(g);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+P(C)
    • Vars
      • P(c);OGATEB,SBLOCK::R(E)
      • P(a);::R(F)+P(G)
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Developed and maintained by Brian Stephenson.
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