MESON Chess Problem Database

Problem Display
PID: 144694 (7Q/4r3/2q2nb1/8/2pN4/PNk5/P3P3/2KR4 w - - 0 1)

Boyle, Rene

Skakbladet, 1980

7Q/4r3/2q2nb1/8/2pN4/PNk5/P3P3/2KR4

#2

8 + 6

15422 Problemskak 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Sb5#
    • 1...Qg2
      • 2.Sb5#
    • 1...Qf3
      • 2.Sb5#
    • 1...Qe4
      • 2.Sb5#
    • 1...Qb5
      • 2.Sxb5#
    • 1...Qa8
      • 2.Sb5#
    • 1...Qd6
      • 2.Sb5#
    • 1...Qe6
      • 2.Sb5#
    • 1...Qc7
      • 2.Sb5#
    • 1...Qc8
      • 2.Sb5#
    • 1...Rxe2
      • 2.Sxe2#
    • 1...Se4
      • 2.Sb5#
    • 1...Sg4
      • 2.Sb5#
    • 1...Sd5
      • 2.Sb5#
    • 1...Sh5
      • 2.Sb5#
    • 1...Sd7
      • 2.Sb5#
    • 1...Sh7
      • 2.Sb5#
    • 1...Se8
      • 2.Sb5#
    • 1...Sg8
      • 2.Sb5#
  • Tries
    • 1.Qxf6?
      • threat
        • 2.Sb5#
        • 2.Se6#
      • 1...Qxf6
        • 2.Sb5#
      • 1...Rxe2
        • 2.Sxe2#
        • 2.Sb5#
      • 1...cxb3
        • 2.Qxc6#
      • 1...Qf3
        • 2.Sb5#
      • 1...Qe4
        • 2.Sb5#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Qd5
        • 2.Sb5#
      • 1...Qd7
        • 2.Sb5#
      • 1...Qc5
        • 2.Sb5#
      • 1...Qb6
        • 2.Sb5#
      • 1...Qd6
        • 2.Sb5#
      • 1...Qe6
        • 2.Sb5#
        • 2.Sxe6#
      • 1...Qc7
        • 2.Sb5#
      • 1...Re3
        • 2.Sb5#
      • 1...Re4
        • 2.Sb5#
      • 1...Re6
        • 2.Sb5#
        • 2.Sxe6#
      • 1...Rd7
        • 2.Sb5#
      • 1...Rf7
        • 2.Sb5#
      • 1...Re5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qe1#
      • 1...Qxh1
        • 2.Sb5#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...cxb3
        • 2.Qxc6#
      • 1...Se4
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 16
  • Sets
    • Q(c);N_GUARD,P_PINR(B)::S(G)
    • Q(c);N_GUARD::S(G)
    • Q(c);N_GUARD::S(G),XQ(c)
    • R(f);XP(D)::S(G),XR(f)
    • S(d);::QAB(H)+S(G),DCHECK
  • Tries
    • Try
      • Q(H);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XQ(H)::S(G)
        • P(b);OGATEB,XS(F)::QAR(H),XQ(c)
        • Q(c);::QAB(H)+S(G),DCHECK
        • Q(c);::QAB(H)+S(G),DCHECK,XQ(c)
        • R(f);::QAB(H)+S(G),DCHECK
      • Refutation
        • R(f);
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • Q(c);N_GUARD,P_PINR(B),XQ(H)::S(G)
      • R(f);XP(D)::S(G),XR(f)
      • P(b);OGATEB,XS(F)::QAR(H),XQ(c)
      • S(d);S_CUTB(e),S_CUTQ(c),S_CUTR(f)::QAR(H)
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