MESON Chess Problem Database

Problem Display
PID: 249771 (7k/4N1p1/4P1K1/2Q2pP1/r7/8/1n1rp3/b2q4 w - - 0 1)

Petrescu, Mihai

Stella Polaris, 1969

7k/4N1p1/4P1K1/2Q2pP1/r7/8/1n1rp3/b2q4

#2

5 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qc8#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qf8#
        • 2.Qc8#
      • 1...Kg8
        • 2.Qc8#
      • 1...Rxd5
        • 2.Qf8#
      • 1...Qc2
        • 2.Qf8#
      • 1...Qc1
        • 2.Qf8#
      • 1...Rc2
        • 2.Qf8#
      • 1...Rc4
        • 2.Qf8#
      • 1...Ra8!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxg7#
      • 1...Sd3
        • 2.Qb8#
      • 1...Sc4
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);S_CUTR(d)::QAR(A)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(i);P-FLIGHT::QAR(A)
        • R(d);XS(E)::QAR2(A)
        • Q(b);::QAR2(A)
        • R(d);::QAR2(A)
        • R(f);::QAR2(A)
      • Refutation
        • R(f);
  • Actual
    • Q(A);P_PINP(h)
    • Threat
      • QAB1(A),XP(h)
    • Vars
      • S(c);S_CUTR(d)::QAR(A)
      • S(c);S_CUTR(f)::QAR(A)
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