MESON Chess Problem Database

Problem Display
PID: 56021 (Q7/1rp1p2K/4p3/3Rp3/1p2k2N/3Rp2N/4b3/8 w - - 0 1)

Janevski, Zivko

2nd HM., StrateGems, 2002

Q7/1rp1p2K/4p3/3Rp3/1p2k2N/3Rp2N/4b3/8

#2

6 + 9

145 StrateGems 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.R5d4#
    • 1...Rb6
      • 2.R5d4#
    • 1...Ra7
      • 2.R5d4#
    • 1...Rb8
      • 2.R5d4#
  • Tries
    • 1.Qxb7?
      • threat
        • 2.R5d4#
        • 2.Qxb4#
      • 1...exd5
        • 2.Qxd5#
      • 1...b3
        • 2.R5d4#
        • 2.Qb4#
      • 1...c5
        • 2.R5d4#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rd8#
      • 1...c6
        • 2.Qxb4#
      • 1...Bxd3!
    • 1.Qa2?
      • threat
        • 2.Qc4#
      • 1...Bxd3
        • 2.Qg2#
      • 1...exd5
        • 2.Qxd5#
      • 1...b3!
    • 1.Qa6?
      • threat
        • 2.Qc4#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...exd5
        • 2.Qg6#
      • 1...Rb5!
    • 1.Qg8?
      • threat
        • 2.Qg6#
      • 1...Bxd3
        • 2.Qg2#
      • 1...Bg4
        • 2.Qxg4#
      • 1...Bh5!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Sg5#
      • 1...Bxd3
        • 2.Qf3#
      • 1...exd5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(g);::QAB(F)+R(D),DCHECK
  • Tries
    • Try
      • Q(F);XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);OGATE,P_SPINP(f),XR(D)::QAB1(F),XP(f)
        • P(h);::QAR(F),XP(c)
      • Refutation
        • B(a);XR(A)
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • B(a);OGATE,XR(A)::QAB(F)
        • P(f);OGATE,XR(D)::QAB1(F),XP(f)
      • Refutation
        • P(c);
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • B(a);OGATE,XR(A)::QAB1(F),XB(a)
        • P(f);OGATE,XR(D)::QAB(F)
      • Refutation
        • R(g);
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • B(a);N_GUARD,XR(A)::QAB(F)
        • B(a);N_GUARD::QAR2(F),XB(a)
      • Refutation
        • B(a);
  • Actual
    • Q(F);
    • Threat
      • S(B)
    • Vars
      • B(a);N_GUARD,XR(A)::QAB1(F)
      • P(f);N_GUARD,XR(D)::QAB1(F)
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