MESON Chess Problem Database

Problem Display
PID: 70696 (8/3Q4/2bN2B1/R2pp3/N1Pk4/q1R5/1rn1P2K/8 w - - 0 1)

Beauruel, M

Oudot, Jean

Scotti, Louis

Problem (Zagreb), 1958

8/3Q4/2bN2B1/R2pp3/N1Pk4/q1R5/1rn1P2K/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Rd3#
    • 1...Qc5
      • 2.Rd3#
    • 1...Qa1
      • 2.Rd3#
    • 1...Qa2
      • 2.Rd3#
    • 1...Qxa4
      • 2.Rd3#
    • 1...Bxd7
      • 2.Rxd5#
    • 1...Sb4
      • 2.Qa7#
    • 1...dxc4
      • 2.Sb5#
    • 1...e4
      • 2.Qg7#
  • Tries
    • 1.Sb5+?
      • 1...Bxb5
        • 2.Qxd5#
      • 1...Rxb5!
    • 1.Qf5?
      • threat
        • 2.Qd3#
      • 1...dxc4
        • 2.Qxe5#
      • 1...Se1
        • 2.Qf2#
      • 1...Sb4
        • 2.Qf2#
      • 1...e4
        • 2.Qf6#
      • 1...Qxc3!
    • 1.Qxc6?
      • threat
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Qxd6
        • 2.Rd3#
      • 1...Qxc3
        • 2.Qc5#
      • 1...Qxa4
        • 2.Rd3#
      • 1...dxc4
        • 2.Sf5#
        • 2.Rd5#
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qxc4#
      • 1...Qc5
        • 2.Rd3#
        • 2.Qxc5#
      • 1...Rb5
        • 2.Sxb5#
      • 1...Sb4
        • 2.Sb5#
        • 2.Qc5#
        • 2.Qb6#
      • 1...Se3!
    • 1.Qa7+?
      • 1...Qc5
        • 2.Rd3#
        • 2.Qxc5#
      • 1...Rb6!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qd3#
      • 1...Qxc3
        • 2.Qxc3#
      • 1...dxc4
        • 2.Rxc4#
      • 1...e4
        • 2.Qh8#
      • 1...Se1
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(c);N_GUARD::R1(C)
    • Q(c);N_GUARD,XS(D)::R1(C)
    • B(g);N_GUARD,XQ(I)::R1(F),XP(e)
    • S(b);P_PINP(A),S_CUTQ(c),S_CUTR(a)::QAB(I)
    • P(e);XP(E)::QAR(I)+S(G),DCHECK
    • P(f);OGATEB::QAB(I)
  • Tries
    • Try
      • S(G);CHECK,P_PINP(e)
      • Vars
        • B(g);XS(G)::QAR1(I),XP(e)
      • Refutation
        • R(a);XS(G)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • P(e);XP(E)::QAB1(I),XP(f)
        • S(b);N_GUARD,P_PINP(A)::QAB(I)
        • P(f);OGATEB::QAB(I)
      • Refutation
        • Q(c);XR(C)
    • Try
      • Q(I);XB(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_GUARD,XS(G)::R1(C)
        • Q(c);N_GUARD,XR(C)::QAB1(I)
        • Q(c);N_GUARD,XS(D)::R1(C)
        • R(a);N_GUARD::S(G),XR(a)
      • Refutation
        • S(b);P_PINP(A)
    • Try
      • Q(I);CHECK
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • Q(c);OGATE,XR(C)::QAB1(I),XQ(c)
      • P(e);OGATE,XP(E)::R1(C),XP(e)
      • P(f);OGATEB::QAB(I)
      • S(b);N_GUARD,P_PINP(A)::QAB1(I)
      • S(b);N_GUARD,P_PINP(A)::QAB1(I),XS(b)
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