MESON Chess Problem Database

Problem Display
PID: 76142 (5R2/3K3p/8/3PkN2/2Pnq1p1/4N1P1/8/B6Q w - - 0 1)

Novitski, Petr Adrinovich

Troll, 2004

5R2/3K3p/8/3PkN2/2Pnq1p1/4N1P1/8/B6Q

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sxg4#
      • 2.Bxd4#
    • 1...Qc2
      • 2.Sxg4#
      • 2.Bxd4#
    • 1...Qd3
      • 2.Sxg4#
    • 1...Qxd5+
      • 2.Qxd5#
    • 1...Qxf5+
      • 2.Rxf5#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Sxg4#
      • 1...Qxd5+
        • 2.Sxd5#
      • 1...Qxf5+
        • 2.Sxf5#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...h5!
    • 1.Qxh7?
      • threat
        • 2.Qe7#
        • 2.Qg7#
        • 2.Qh8#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Qxe3
        • 2.Qe7#
      • 1...Qb1
        • 2.Qe7#
      • 1...Qh1
        • 2.Qe7#
      • 1...Qc2
        • 2.Qe7#
      • 1...Qg2
        • 2.Qe7#
      • 1...Qd3
        • 2.Qe7#
      • 1...Qf3
        • 2.Qe7#
      • 1...Qf4
        • 2.Qe7#
      • 1...Qxd5+!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qe8#
      • 1...Qxd5+
        • 2.Sd6#
      • 1...Qxf5+
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD::S(C),XP(c)
    • Q(b);CHECK,OGATE,XP(F)::QAR1(B),XQ(b)
    • Q(b);CHECK,OGATE,XS(G)::R1(I),XQ(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • S(C),XP(c)
      • Vars
        • Q(b);CHECK,XP(F)::QAR(B)+S(C),XQ(b)
        • Q(b);CHECK,XS(G)::QAR(B)+S(C),XQ(b)
        • Q(b);OGATE,P_SPINQ(b),XS(C)::QAR2(B),XQ(b)
      • Refutation
        • P(e);
    • Try
      • Q(B);XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);CHECK,OGATE,XS(G)::QAR1(B),XQ(b)
        • Q(b);XS(C)::QAR2(B)
        • Q(b);::QAR2(B)
      • Refutation
        • Q(b);CHECK,XP(F)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • Q(b);CHECK,N_GUARD,XP(F)::QAR(B)+S(G)
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(G)::QAR1(B),XQ(b)
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