MESON Chess Problem Database

Problem Display
PID: 65828 (N1b3K1/3p4/3n2R1/2Nk3P/P2Pp2R/8/3pQpn1/B1r1b1rB w - - 0 1)

Carrez, Jean-Pierre

Roche, Jean

1st Prize, Europe Echecs, 1974

N1b3K1/3p4/3n2R1/2Nk3P/P2Pp2R/8/3pQpn1/B1r1b1rB

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qxe4#
    • 1...Sc4
      • 2.Sc7#
      • 2.Qxe4#
    • 1...Sb5
      • 2.Sb6#
    • 1...Sf5
      • 2.Sb6#
      • 2.Sc7#
    • 1...Sb7
      • 2.Sb6#
      • 2.Sc7#
    • 1...Sf7
      • 2.Sb6#
      • 2.Sc7#
    • 1...Se8
      • 2.Sb6#
  • Tries
    • 1.Qa6?
      • threat
        • 2.Sc7#
        • 2.Rxd6#
      • 1...Rxa1
        • 2.Rxd6#
      • 1...Rxc5
        • 2.Rxd6#
      • 1...Sxh4
        • 2.Sc7#
      • 1...Rc3
        • 2.Rxd6#
      • 1...Sb5
        • 2.Sb6#
      • 1...Se3
        • 2.Sc7#
      • 1...Sf4
        • 2.Sc7#
      • 1...Sc4
        • 2.Sc7#
      • 1...Sf5
        • 2.Sb6#
        • 2.Sc7#
      • 1...Sb7
        • 2.Sb6#
        • 2.Sc7#
        • 2.Rg5#
      • 1...Sf7
        • 2.Sb6#
        • 2.Sc7#
      • 1...Se8
        • 2.Sb6#
        • 2.Rg5#
      • 1...Bxa6!
    • 1.Qxe4+?
      • 1...Sxe4
        • 2.Sb6#
      • 1...Kc4!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Rxd6#
      • 1...Kc6
        • 2.Qb5#
      • 1...Sxh4
        • 2.Sf6#
      • 1...Sxe4
        • 2.Sb6#
      • 1...Rc6
        • 2.Sf6#
      • 1...Se3
        • 2.Sc3#
      • 1...Sf4
        • 2.Sf6#
      • 1...Sc4
        • 2.Sc7#
      • 1...Sb5
        • 2.Sb6#
      • 1...Sf5
        • 2.Sb6#
      • 1...Sb7
        • 2.Sb6#
      • 1...Sf7
        • 2.Sb6#
      • 1...Se8
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(h);P_SPINS(i),S_FLIGHT::QAB(C),XP(g)
    • S(i);::S(J)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XB(A)::R1(I),XS(i)
        • R(a);XS(G)::R1(I),XS(i)
        • S(f);P_PINR(I),P_SPINP(g),XR(F)::S(J)
        • R(a);::R1(I),XS(i)
        • S(i);::S(J)
        • S(f);P_PINR(I),P_SPINP(g)::S(J)
      • Refutation
        • B(k);XQ(C)
    • Try
      • Q(C);CHECK,XP(g)
      • Vars
        • S(i);XQ(C)::S(J)
      • Refutation
        • K(h);S_FLIGHT
  • Actual
    • S(G);XP(g)
    • Threat
      • R1(I),XS(i)
    • Vars
      • K(h);P_SPINS(i),S_FLIGHT::QAB1(C)
      • S(f);P_PINR(I),XR(F)::B(B)+S(G),DCHECK
      • S(i);XS(G)::S(J)
      • R(a);SBLOCK::S(G)
      • S(f);P_PINR(I)::B(B)+S(G),DCHECK
      • S(i);S_CUTR(a)::S(J)
      • S(i);::S(J)
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