MESON Chess Problem Database

Problem Display
PID: 232583 (7Q/3p1Bp1/1p1P1Pr1/4N3/1npNkBp1/2P3K1/3P4/4n3 w - - 0 1)

Heyl, Peter

Freie Presse, 2002

7Q/3p1Bp1/1p1P1Pr1/4N3/1npNkBp1/2P3K1/3P4/4n3

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sec2
      • 2.Qh1#
    • 1...Sed3
      • 2.Qh1#
    • 1...Sa2
      • 2.Qa8#
    • 1...Sbc2
      • 2.Qa8#
    • 1...Sbd3
      • 2.Qa8#
    • 1...Sd5
      • 2.Bxg6#
    • 1...Sa6
      • 2.Qa8#
  • Tries
    • 1.Qh1+?
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sf3!
    • 1.Qh2?
      • threat
        • 2.Qe2#
      • 1...Sec2
        • 2.Qh1#
        • 2.Qg2#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sd5
        • 2.Bxg6#
      • 1...Sbc2!
    • 1.Qa8+?
      • 1...Sd5
        • 2.Bxd5#
        • 2.Bxg6#
        • 2.Qxd5#
      • 1...Sc6!
    • 1.d3+?
      • 1...Sexd3
        • 2.Qh1#
      • 1...Sbxd3
        • 2.Qa8#
      • 1...cxd3!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sf2#
      • 1...Kxd3
        • 2.Bxg6#
      • 1...Sexd3
        • 2.Qh1#
      • 1...Sbxd3
        • 2.Qa8#
      • 1...cxd3
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::QAB(J)
    • S(b);N_GUARD::QAB(J)
    • S(b);SBLOCK::B(I),XR(g)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(J),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(J);
      • Threat
        • QAR2(J)
      • Vars
        • S(a);N_GUARD::QAB(J),XS(a)
        • S(b);SBLOCK::B(I),XR(g)
      • Refutation
        • S(b);
    • Try
      • Q(J);CHECK
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • P(A);CHECK
      • Vars
        • S(a);XP(A)::QAB(J)
        • S(b);XP(A)::QAB(J)
      • Refutation
        • P(c);XP(A)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);S_FLIGHT,XS(F)::B(I),XR(g)
      • S(a);N_GUARD,SBLOCK,XS(F)::QAB(J)
      • S(b);N_GUARD,SBLOCK,XS(F)::QAB(J)
      • P(c);SBLOCK,XS(F)::QAR(J)
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