MESON Chess Problem Database

Problem Display
PID: 260739 (3RQ3/8/5p2/N2b3r/1P1k1q2/5P2/2PP1n1B/K7 w - - 0 1)

Mirri, Giorgio

2nd Prize, Neue Zurcher Zeitung, 1981

3RQ3/8/5p2/N2b3r/1P1k1q2/5P2/2PP1n1B/K7

#2

9 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh2
      • 2.Qe3#
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qg3
      • 2.Qe3#
    • 1...Qd6
      • 2.Qe3#
    • 1...Qc7
      • 2.Qe3#
    • 1...Qb8
      • 2.Qe3#
    • 1...Qg4
      • 2.Qe3#
    • 1...Qh4
      • 2.Qe3#
    • 1...Qf5
      • 2.Qe3#
    • 1...Sd3
      • 2.c3#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Sb3#
        • 2.Sc6#
        • 2.c3#
      • 1...Qxf3
        • 2.Sc6#
        • 2.Qc4#
      • 1...Se4
        • 2.Sc6#
      • 1...Qe3
        • 2.Sc6#
        • 2.Qc4#
        • 2.Qxe3#
      • 1...Qd6
        • 2.Qxf2#
        • 2.Qe3#
        • 2.c3#
      • 1...Qc7
        • 2.Sb3#
        • 2.Qxf2#
        • 2.Qe3#
      • 1...Sd1
        • 2.Sb3#
        • 2.Sc6#
      • 1...Sd3
        • 2.c3#
      • 1...Qxd2!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Sc6#
      • 1...Ke5
        • 2.Qxd5#
      • 1...Qxd2
        • 2.Qc5#
      • 1...Qxf3
        • 2.Qc4#
      • 1...Qd6
        • 2.c3#
      • 1...Qc7
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD,XB(D)::QAB1(I)
    • Q(c);N_GUARD::QAB1(I),XQ(c)
    • Q(c);N_GUARD::QAB1(I)
    • Q(c);N_GUARD,N_SPINB(d)::QAB1(I)
    • S(a);SBLOCK::P(B)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);::S(G)
        • S(a);::P(B)
      • Refutation
        • Q(c);XP(C)
  • Actual
    • Q(I);
    • Threat
      • S(G)
    • Vars
      • K(b);P_SPINQ(c),S_CUTR(e),S_FLIGHT::QAR1(I),XB(d)
      • Q(c);XP(C)::QAB1(I)
      • Q(c);XP(E)::QAR1(I)
      • Q(c);N_SPINB(d)::P(B)
      • Q(c);::S(G)
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