MESON Chess Problem Database

Problem Display
PID: 92076 (7Q/2N5/4P1K1/1pB1pR2/1P2k1p1/1p1p4/2pPp3/q7 w - - 0 1)

Wielgos, Oskar

Schach-Echo, 1964

7Q/2N5/4P1K1/1pB1pR2/1P2k1p1/1p1p4/2pPp3/q7

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qh1#
      • 2.Qa8#
    • 1...Qc3
      • 2.Qh1#
      • 2.Qa8#
    • 1...Qd4
      • 2.Qh1#
    • 1...Qb1
      • 2.Qxe5#
      • 2.Qa8#
    • 1...Qc1
      • 2.Qxe5#
      • 2.Qa8#
    • 1...Qd1
      • 2.Qxe5#
      • 2.Qa8#
    • 1...Qe1
      • 2.Qxe5#
      • 2.Qa8#
    • 1...Qf1
      • 2.Qxe5#
      • 2.Qa8#
    • 1...Qg1
      • 2.Qxe5#
      • 2.Qa8#
    • 1...Qh1
      • 2.Qxe5#
      • 2.Qxh1#
      • 2.Qa8#
    • 1...Qa2
      • 2.Qxe5#
      • 2.Qh1#
    • 1...Qa3
      • 2.Qxe5#
      • 2.Qh1#
    • 1...Qa4
      • 2.Qxe5#
      • 2.Qh1#
    • 1...Qa5
      • 2.Qxe5#
      • 2.Qh1#
    • 1...Qa6
      • 2.Qxe5#
      • 2.Qh1#
    • 1...Qa7
      • 2.Qxe5#
      • 2.Qh1#
    • 1...Qa8
      • 2.Qxe5#
      • 2.Qh1#
      • 2.Qxa8#
    • 1...c1S
      • 2.Qh1#
    • 1...c1B
      • 2.Qh1#
    • 1...e1B
      • 2.Qh1#
    • 1...b2
      • 2.Qxe5#
    • 1...g3
      • 2.Qh4#
  • Tries
    • 1.Sa6?
      • threat
        • 2.Qa8#
      • 1...Qxa6
        • 2.Qxe5#
        • 2.Qh1#
      • 1...Qd4
        • 2.Qh1#
      • 1...Kd5!
    • 1.Bg1?
      • threat
        • 2.Qh1#
      • 1...Qxg1
        • 2.Qxe5#
      • 1...Qf1
        • 2.Qxe5#
        • 2.Qa8#
      • 1...g3
        • 2.Qh4#
      • 1...e1S!
    • 1.Qh2?
      • threat
        • 2.Qg2#
      • 1...Qf1
        • 2.Qxe5#
      • 1...Qg1
        • 2.Qxe5#
      • 1...Qh1
        • 2.Qxe5#
        • 2.Qxh1#
      • 1...e1S!
    • 1.Qd8?
      • threat
        • 2.Qd5#
      • 1...Qa8
        • 2.Qxa8#
      • 1...Qd4!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qxe5#
      • 1...Kxd4
        • 2.Rf4#
      • 1...Qxd4
        • 2.Qh1#
      • 1...exd4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::QAB(H)
    • P(b);S_CUTQ(a)::QAB(H)
    • P(c);S_CUTQ(a)::QAB(H)
    • P(d);S_CUTQ(a)::QAR1(H),XP(i)
    • P(g);OGATEB::QAR(H)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB(H)
      • Vars
        • Q(a);N_GUARD::QAB(H)
      • Refutation
        • K(f);P_SPINP(i),S_FLIGHT
    • Try
      • B(C);
      • Threat
        • QAB(H)
      • Vars
        • Q(a);N_GUARD,XB(C)::QAR1(H),XP(i)
        • P(g);OGATEB::QAR(H)
      • Refutation
        • P(c);
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • Q(a);N_GUARD::QAR1(H),XP(i)
      • Refutation
        • P(c);
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • Q(a);N_GUARD::QAB(H),XQ(a)
      • Refutation
        • Q(a);
  • Actual
    • B(C);
    • Threat
      • QAR1(H),XP(i)
    • Vars
      • K(f);P-FLIGHT,P_SPINP(i),XB(C)::R(D)
      • Q(a);N_GUARD,SBLOCK,XB(C)::QAB(H)
      • P(i);XB(C)::QAR1(H)
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