MESON Chess Problem Database

Problem Display
PID: 80136 (3R4/1p1N1P2/2pNP3/2p1pPK1/3kP3/P2n2p1/1n1B1p2/1B3Q2 w - - 0 1)

Boyer, Jean-Pierre

3rd HM.=, Probleme TT, 1967

3R4/1p1N1P2/2pNP3/2p1pPK1/3kP3/P2n2p1/1n1B1p2/1B3Q2

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qxd3#
    • 1...Sc4
      • 2.Qxd3#
  • Tries
    • 1.Sxe5?
      • threat
        • 2.Sf3#
      • 1...Kxe5
        • 2.Bc3#
      • 1...Sxe5
        • 2.Sb5#
      • 1...Se1
        • 2.Sdc4#
      • 1...c4!
    • 1.Qe2?
      • threat
        • 2.Qe3#
      • 1...Sd1
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qxd3#
      • 1...f1S!
    • 1.Qc1?
      • threat
        • 2.Bc3#
        • 2.Be3#
        • 2.Qc3#
      • 1...f1S
        • 2.Bc3#
        • 2.Qc3#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sa4
        • 2.Be3#
        • 2.Qc4#
      • 1...Sc4
        • 2.Bc3#
        • 2.Qc3#
        • 2.Qxc4#
      • 1...Sxc1!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Sb3#
      • 1...Kxc5
        • 2.Be3#
      • 1...Sxc5
        • 2.Sb5#
      • 1...Sc1
        • 2.Sdxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAR1(B),XS(c)
  • Tries
    • Try
      • S(J);XP(g)
      • Threat
        • S(J)
      • Vars
        • K(e);S_FLIGHT,XS(J)::B(C)
        • S(c);SBLOCK,XS(J)::R(L)+S(H),DCHECK
        • S(c);::R(L)+S(H)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(c)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • S(c);XQ(B)
  • Actual
    • S(J);XP(f)
    • Threat
      • S(J)
    • Vars
      • K(e);S_FLIGHT,XS(J)::B(C)
      • S(c);SBLOCK,XS(J)::R(L)+S(H),DCHECK
      • S(c);::R(L)+S(H),XP(i)
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