MESON Chess Problem Database

Problem Display
PID: 163356 (2rNR1Kn/BQ6/2Np1b2/3k4/bP6/1P2n3/8/8 w - - 0 1)

Ivanovsky, Nikolai Aleksandrovich

Novi Temi, 1972

2rNR1Kn/BQ6/2Np1b2/3k4/bP6/1P2n3/8/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb3
      • 2.Qb5#
    • 1...Bb5
      • 2.Qxb5#
    • 1...Be5
      • 2.Se7#
    • 1...Sg6
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
  • Tries
    • 1.Re5+?
      • 1...Bxe5
        • 2.Se7#
      • 1...dxe5!
    • 1.Qd7?
      • threat
        • 2.Qe6#
      • 1...Bxd8
        • 2.Re5#
      • 1...Be5
        • 2.Rxe5#
      • 1...Rxd8!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qe4#
      • 1...Be5
        • 2.Se7#
      • 1...Be7
        • 2.Qd3#
      • 1...Sf5
        • 2.Qh1#
      • 1...Sg6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD,XP(A)::QAR2(E)
    • B(b);N_GUARD::QAR2(E),XB(b)
    • B(e);SBLOCK::QAB(E)+S(C),DCHECK
    • S(g);N_GUARD::QAB(E)
    • S(g);N_GUARD::QAB(E),XS(g)
  • Tries
    • Try
      • R(G);CHECK,P_SPINS(F)
      • Vars
        • B(e);SBLOCK,XR(G)::QAB(E)+S(C),DCHECK
      • Refutation
        • P(d);XR(G)
    • Try
      • Q(E);P_PINP(d)
      • Threat
        • QAB1(E)
      • Vars
        • B(e);N_GUARD,XS(F)::R1(G)
        • B(e);N_GUARD::R1(G),XB(e)
      • Refutation
        • R(f);P_PINR(G),XS(F)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • B(e);N_GUARD,SBLOCK::S(C)
      • B(e);N_GUARD::QAR2(E)
      • S(a);N_GUARD::QAB(E)
      • S(g);N_GUARD::QAB(E)
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