MESON Chess Problem Database

Problem Display
PID: 171071 (6R1/6b1/QB1p4/2q5/1p3p2/5P1K/2R4P/5Nk1 w - - 0 1)

Schiffmann, Israel Abraham

Shakhmaty v SSSR, 1971

6R1/6b1/QB1p4/2q5/1p3p2/5P1K/2R4P/5Nk1

#2

8 + 6

SOLUTION

  • SOUND
  • Tries
    • 1.Sg3?
      • threat
        • 2.Rg2#
        • 2.Qf1#
      • 1...Qf2
        • 2.Bxf2#
        • 2.Rc1#
        • 2.Qf1#
      • 1...fxg3!
    • 1.Qe2?
      • threat
        • 2.Qg2#
      • 1...Kh1
        • 2.Qg2#
      • 1...Qf2!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Se3#
      • 1...Kh1
        • 2.Sg3#
      • 1...Qf2
        • 2.Sd2#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Qd4
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);N_PINB(f)
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);XS(A)
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(a);N_SPINB(f),N_SPINQ(d),P-FLIGHT::QAB1(F)
      • Refutation
        • Q(d);
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+S(A)
    • Vars
      • K(a);N_SPINB(f),N_SPINQ(d),P-FLIGHT::QAR(F)+S(A),DCHECK
      • Q(d);::QAR(F)+S(A)
      • Q(d);P_PINP(D)::QAR(F)+S(A),XQ(d)
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