MESON Chess Problem Database

Problem Display
PID: 82164 (3R1n2/1K6/pQ1NP3/2pP3R/3k4/1P1n2N1/3P1p1B/1B3q2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Tidskrift for Schack, 1974

3R1n2/1K6/pQ1NP3/2pP3R/3k4/1P1n2N1/3P1p1B/1B3q2

#2

12 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Sxe2#
    • 1...Qg2
      • 2.Se2#
    • 1...Qh3
      • 2.Se2#
    • 1...Qxb1
      • 2.Se2#
    • 1...Qc1
      • 2.Se2#
    • 1...Qg1
      • 2.Se2#
    • 1...Qh1
      • 2.Se2#
    • 1...Se5
      • 2.Sdf5#
    • 1...a5
      • 2.Sb5#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Sdf5#
      • 1...Qh3
        • 2.Se2#
      • 1...Sd7!
    • 1.Qxa6?
      • threat
        • 2.Sb5#
        • 2.Qc4#
      • 1...Se5
        • 2.Sdf5#
      • 1...c4
        • 2.Qxc4#
      • 1...Qc1
        • 2.Se2#
        • 2.Sb5#
        • 2.Qxd3#
      • 1...Sc1
        • 2.Qa1#
      • 1...Se1
        • 2.Qa1#
      • 1...Sb4
        • 2.Qa1#
      • 1...Sf4
        • 2.Qa1#
      • 1...Sb2!
    • 1.Qc6?
      • threat
        • 2.Sgf5#
      • 1...Qh3
        • 2.Se2#
      • 1...Sf4!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qc3#
      • 1...Se5
        • 2.Sdf5#
      • 1...Qc1
        • 2.Se2#
      • 1...Sb4
        • 2.Qa1#
      • 1...c4
        • 2.Sgf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::S(E),XQ(a)
    • Q(a);N_GUARD,P_PINP(F)::S(E)
    • Q(a);N_GUARD::S(E)
    • Q(a);N_GUARD,XB(A)::S(E)
    • S(c);SBLOCK::S(I)
    • P(f);N_GUARD::S(I)
  • Tries
    • Try
      • Q(H);N_PINP(e)
      • Threat
        • S(I)
      • Vars
        • Q(a);N_GUARD::S(E)
      • Refutation
        • S(g);
    • Try
      • Q(H);N_PINP(e),XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);SBLOCK::S(I)
        • P(e);::QAR1(H),XP(e)
        • S(c);N_GUARD::QAB(H)
      • Refutation
        • S(c);
    • Try
      • Q(H);N_PINP(e)
      • Threat
        • S(E)
      • Vars
        • Q(a);N_GUARD::S(E)
      • Refutation
        • S(c);
  • Actual
    • Q(H);N_PINP(e)
    • Threat
      • QAB1(H)
    • Vars
      • S(c);SBLOCK::S(I)
      • Q(a);N_GUARD::S(E)
      • S(c);N_GUARD::QAB(H)
      • P(e);::S(E)
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