MESON Chess Problem Database

Problem Display
PID: 232604 (8/5ppp/3K1k2/1R6/1pp3pq/2N1N1p1/2B5/Q1n5 w - - 0 1)

Heyl, Peter

Freie Presse, 2010

8/5ppp/3K1k2/1R6/1pp3pq/2N1N1p1/2B5/Q1n5

#2

6 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Scd5#
    • 1...Qh1
      • 2.Sxg4#
    • 1...Qh2
      • 2.Sxg4#
    • 1...Qh6
      • 2.Sxg4#
    • 1...Sa2
      • 2.Qf1#
    • 1...Sb3
      • 2.Qf1#
    • 1...bxc3
      • 2.Qxc3#
    • 1...g5
      • 2.Scd5#
    • 1...g6
      • 2.Se4#
  • Tries
    • 1.Bxh7?
      • threat
        • 2.Se4#
        • 2.Rf5#
      • 1...bxc3
        • 2.Rf5#
        • 2.Qxc3#
      • 1...g5
        • 2.Se4#
        • 2.Scd5#
      • 1...g6
        • 2.Se4#
      • 1...Qg5
        • 2.Se4#
        • 2.Scd5#
      • 1...Qh5
        • 2.Se4#
      • 1...Qxh7!
    • 1.Qa7?
      • threat
        • 2.Qd4#
        • 2.Qe7#
      • 1...g5
        • 2.Qd4#
      • 1...g6
        • 2.Qd4#
      • 1...Qg5
        • 2.Qe7#
      • 1...Qh5
        • 2.Qe7#
      • 1...Se2
        • 2.Qe7#
      • 1...Sb3
        • 2.Qe7#
      • 1...Sd3!
    • 1.Qa8?
      • threat
        • 2.Qd8#
      • 1...g5
        • 2.Qh8#
      • 1...g6
        • 2.Qh8#
      • 1...Sd3!
  • Keys
    • 1.Kd7!
      • threat
        • 2.Qa6#
      • 1...g5
        • 2.Scd5#
      • 1...g6
        • 2.Se4#
      • 1...Qh1
        • 2.Sxg4#
      • 1...Sa2
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(f);SBLOCK::QAB(A)+S(C),DCHECK
    • Q(f);N_GUARD::S(D),XP(e)
    • S(a);OGATE::QAR(A)
    • P(c);OGATE,P_SPINP(c),XS(C)::QAB(A),XP(c)
    • P(i);SBLOCK::QAB(A)+S(C),DCHECK
  • Tries
    • Try
      • B(B);XP(j)
      • Threat
        • DUALS(2)
      • Vars
        • P(i);::QAB(A)+S(C),DCHECK
        • Q(f);::QAB(A)+S(C),DCHECK
      • Refutation
        • Q(f);XB(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(i);::QAB(A)
        • Q(f);::QAB1(A)
        • S(a);::QAB1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(i);OGATEB::QAB(A)
      • Refutation
        • S(a);
  • Actual
    • K(F);P-FLIGHT
    • Threat
      • QAR(A)
    • Vars
      • P(i);SBLOCK::QAB(A)+S(C),DCHECK
      • Q(f);N_GUARD::S(D),XP(e)
      • S(a);OGATE::QAR(A)
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