MESON Chess Problem Database

Problem Display
PID: 231305 (6K1/8/8/8/bbpR3B/4pk2/1QN1R3/2N2n2 w - - 0 1)

Neiman, Moisei Borisovich

64 Shakhmatnoe obozrenie, 1927

6K1/8/8/8/bbpR3B/4pk2/1QN1R3/2N2n2

#2

7 + 6

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Sxe1#
    • 1...Ba3
      • 2.Se1#
    • 1...Bc5
      • 2.Se1#
    • 1...Bd6
      • 2.Se1#
    • 1...Be7
      • 2.Se1#
    • 1...Bf8
      • 2.Se1#
    • 1...Sd2
      • 2.Se1#
    • 1...c3
      • 2.Se1#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Se1#
        • 2.Rf2#
      • 1...Bxc2
        • 2.Rf2#
      • 1...Sg3
        • 2.Se1#
        • 2.Qxe3#
      • 1...Bxc3!
    • 1.Qxb4?
      • threat
        • 2.Se1#
        • 2.Qf8#
      • 1...Bd7
        • 2.Se1#
      • 1...Be8
        • 2.Se1#
      • 1...Sg3
        • 2.Se1#
      • 1...Bxc2!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Rf2#
      • 1...Bxa3
        • 2.Se1#
      • 1...Bb3
        • 2.Qa8#
      • 1...Be1
        • 2.Sxe1#
        • 2.Qf8#
      • 1...Bc3
        • 2.Qf8#
      • 1...Sg3
        • 2.Qxe3#
      • 1...c3
        • 2.Se1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(e);N_GUARD::S(C),XB(e)
    • B(e);N_GUARD::S(C)
    • S(a);S_CUTB(e)::S(C)
    • P(f);S_CUTB(e)::S(C)
  • Tries
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(d);XS(C)::R1(D)
      • Refutation
        • B(e);N_SPINP(b),XQ(B)
    • Try
      • Q(B);XB(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(d);::S(C)
        • S(a);::S(C)
      • Refutation
        • B(d);XS(C)
  • Actual
    • Q(B);P_PINP(b)
    • Threat
      • R1(D)
    • Vars
      • B(e);N_GUARD,N_SPINP(b),XQ(B)::S(C)
      • B(d);N_SPINP(b),OGATE::QAB(B)
      • B(e);N_SPINP(b),OGATE::QAR(B)
      • S(a);N_GUARD::QAR1(B),XP(b)
      • P(f);N_SPINP(b),S_CUTB(e)::S(C)
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