MESON Chess Problem Database

Problem Display
PID: 50333 (7Q/2nB3K/3pP2p/1p1k2bR/1p3pN1/1N1P1n2/8/8 w - - 0 1)

Delobel, Bernard

HM., StrateGems, 2003

7Q/2nB3K/3pP2p/1p1k2bR/1p3pN1/1N1P1n2/8/8

#2

8 + 9

145 StrateGems 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qd4#
    • 1...Sg1
      • 2.Qd4#
    • 1...Sd2
      • 2.Qd4#
    • 1...Sh2
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sh4
      • 2.Qd4#
    • 1...Sa6
      • 2.Qa8#
    • 1...Sxe6
      • 2.Qa8#
    • 1...Sa8
      • 2.Qxa8#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Sf6#
      • 1...Se5
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se8!
    • 1.Qc3?
      • threat
        • 2.Sf6#
        • 2.Qc6#
      • 1...Se5
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se8
        • 2.Qc6#
      • 1...bxc3!
    • 1.e7?
      • 1...Se1
        • 2.Qd4#
      • 1...Sg1
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sh2
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sh4
        • 2.Qd4#
      • 1...Sa6
        • 2.Qa8#
        • 2.Qg8#
      • 1...Se6
        • 2.Qa8#
      • 1...Sa8
        • 2.Qxa8#
        • 2.Qg8#
      • 1...Se8
        • 2.Qg8#
      • 1...Se5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sf6#
      • 1...Se5
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Se8
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • S(a);N_GUARD::QAR1(H)
    • S(a);N_GUARD::QAR1(H),XS(a)
    • S(i);N_GUARD::QAB(H)
    • S(i);N_GUARD,XP(E)::QAB(H)
    • S(i);N_GUARD::QAB(H),XS(i)
  • Tries
    • Try
      • Q(H);
      • Threat
        • S(C)
      • Vars
        • S(a);N_GUARD,N_SPINB(f)::QAR1(H)
        • S(a);N_GUARD::QAR1(H),XS(a)
      • Refutation
        • S(i);
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD,N_SPINB(f)::QAR1(H)
        • S(a);N_GUARD::QAR1(H),XS(a)
        • S(i);::QAB1(H)
      • Refutation
        • P(b);XQ(H)
    • Try
      • P(E);
      • Vars
        • S(a);N_GUARD::QAR1(H)
        • S(a);N_GUARD::QAR1(H),XS(a)
        • S(i);N_GUARD::QAB(H)
      • Refutation
        • S(a);N_SPINB(f)
  • Actual
    • Q(H);
    • Threat
      • S(C)
    • Vars
      • S(a);N_GUARD,N_SPINB(f)::QAR1(H)
      • S(a);N_GUARD::QAR1(H),XS(a)
      • S(i);N_GUARD::QAB(H)
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