MESON Chess Problem Database

Problem Display
PID: 232732 (8/2pK4/5p2/1p2k1n1/1p3n2/1Bp1B1N1/8/Q7 w - - 0 1)

Hahnel, Peter

Freie Presse, 1992

8/2pK4/5p2/1p2k1n1/1p3n2/1Bp1B1N1/8/Q7

#2

5 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...Se4
        • 2.Qxe4#
      • 1...c2
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sd3!
  • Keys
    • 1.Qa8!
      • 1...f5
        • 2.Qh8#
      • 1...Sd3
        • 2.Qd5#
      • 1...Se2
        • 2.Qd5#
      • 1...Sg2
        • 2.Qd5#
      • 1...Sfh3
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sh5
        • 2.Qd5#
      • 1...Sfe6
        • 2.Qd5#
      • 1...Sg6
        • 2.Qd5#
      • 1...Sf3
        • 2.Qe4#
      • 1...Sgh3
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sge6
        • 2.Qe4#
      • 1...Sf7
        • 2.Qe4#
      • 1...Sh7
        • 2.Qe4#
      • 1...c2
        • 2.Qa1#
      • 1...c5
        • 2.Qb8#
      • 1...c6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 18
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAR1(A)
      • Vars
        • P(g);::QAR1(A),XP(g)
        • S(f);N_GUARD::QAR1(A),XS(f)
      • Refutation
        • S(c);
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • P(g);OGATEB::QAB(A)
      • S(c);N_GUARD::QAR1(A)
      • S(c);N_GUARD::QAR1(A),XS(c)
      • S(f);N_GUARD::QAR1(A)
      • S(f);N_GUARD::QAR1(A),XS(f)
      • P(a);OGATEB::QAB(A)
      • P(h);OGATEB::QAB(A)
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