MESON Chess Problem Database

Problem Display
PID: 108223 (8/3p1p2/3R1R2/pQ6/r1r5/2P5/N1BBk2K/1q1b4 w - - 0 1)

Boyer, Jean-Pierre

3rd Prize, Mat, 1983

8/3p1p2/3R1R2/pQ6/r1r5/2P5/N1BBk2K/1q1b4

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sxc1#
    • 1...Qb3
      • 2.Sc1#
    • 1...Qb4
      • 2.Sc1#
    • 1...Qxb5
      • 2.Sc1#
    • 1...Rxa2
      • 2.Qxc4#
    • 1...Ra3
      • 2.Qxc4#
  • Tries
    • 1.Be4?
      • threat
        • 2.Qh5#
      • 1...Qxe4
        • 2.Sc1#
      • 1...Qxb5
        • 2.Sc1#
      • 1...Qd3!
    • 1.Rf4?
      • threat
        • 2.Qh5#
      • 1...Qxb5
        • 2.Sc1#
      • 1...f5!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Qe5#
        • 2.Qh5#
      • 1...Qxc2
        • 2.Qh5#
      • 1...Qxb5
        • 2.Sc1#
      • 1...Bxc2
        • 2.Qh5#
      • 1...d5
        • 2.Qe8#
      • 1...d6
        • 2.Qe8#
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD::S(A)
    • Q(a);N_GUARD,N_SPINR(e),XQ(F)::S(A)
    • R(d);N_GUARD,XS(A)::QAB(F),XR(e)
    • R(d);N_GUARD::QAB(F),XR(e)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAB(F)
      • Vars
        • Q(a);N_GUARD,XB(B)::S(A)
        • Q(a);N_GUARD,N_SPINR(e),XQ(F)::S(A)
      • Refutation
        • Q(a);N_SPINR(e)
    • Try
      • R(H);
      • Threat
        • QAB(F)
      • Vars
        • Q(a);N_GUARD,N_SPINR(e),XQ(F)::S(A)
      • Refutation
        • P(h);
  • Actual
    • R(G);
    • Threat
      • DUALS(2)
    • Vars
      • Q(a);XB(B)::QAB(F)
      • Q(a);N_GUARD,N_SPINR(e),XQ(F)::S(A)
      • B(b);XB(B)::QAB(F)
      • P(g);OGATE::QAR(F)
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