MESON Chess Problem Database

Problem Display
PID: 30248 (8/3K1p2/3p2r1/2Pkp3/p1p1NRP1/4P1b1/2PP4/Q7 w - - 0 1)

Onkoud, Abdelaziz

Die Schwalbe, 2001

8/3K1p2/3p2r1/2Pkp3/p1p1NRP1/4P1b1/2PP4/Q7

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qa2#
    • 1...exf4
      • 2.Qd4#
    • 1...dxc5
      • 2.Sc3#
  • Tries
    • 1.Rf5?
      • threat
        • 2.Qd4#
      • 1...Kxe4
        • 2.Qh1#
      • 1...dxc5
        • 2.Sc3#
      • 1...c3!
    • 1.Qb1?
      • threat
        • 2.Qb7#
      • 1...dxc5
        • 2.Sc3#
      • 1...c3
        • 2.Qa2#
      • 1...exf4!
    • 1.Qa3?
      • threat
        • 2.Sc3#
      • 1...c3
        • 2.Sxc3#
        • 2.Qa2#
      • 1...exf4!
    • 1.Qxa4?
      • threat
        • 2.Qc6#
        • 2.Qa8#
      • 1...dxc5
        • 2.Sc3#
      • 1...Rg8
        • 2.Qc6#
      • 1...c3
        • 2.Qb3#
        • 2.Qa2#
      • 1...exf4!
    • 1.d4?
      • threat
        • 2.Sc3#
      • 1...exd4
        • 2.Qxd4#
      • 1...cxd4 ep
        • 2.Qa2#
      • 1...c3
        • 2.Qa2#
      • 1...Be1!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qb7#
      • 1...exf4
        • 2.Qd4#
      • 1...dxc5
        • 2.Sc3#
      • 1...c3
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAB(A)
    • P(e);N_GUARD,XR(F)::QAR1(A)
    • P(f);SBLOCK,XP(H)::S(E)
  • Tries
    • Try
      • R(F);P_PINP(e)
      • Threat
        • QAR1(A)
      • Vars
        • K(d);N_SPINP(e),OGATEB,S_FLIGHT,XS(E)::QAB(A)
        • P(f);SBLOCK,XP(H)::S(E)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(f);SBLOCK,XP(H)::S(E)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • P(e);XR(F)
    • Try
      • Q(A);
      • Threat
        • S(E)
      • Refutation
        • P(e);XR(F)
    • Try
      • Q(A);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);SBLOCK,XP(H)::S(E)
        • R(g);::QAB1(A)
      • Refutation
        • P(e);XR(F)
    • Try
      • P(C);
      • Threat
        • S(E)
      • Vars
        • P(e);OGATE,XP(C)::QAR1(A),XP(e)
        • P(c);EP,OGATEB,XP(C)::QAB(A)
        • P(c);OGATEB::QAB(A)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • P(e);N_GUARD,XR(F)::QAR1(A)
      • P(f);SBLOCK,XP(H)::S(E)
      • P(c);OGATEB::QAB(A)
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