MESON Chess Problem Database

Problem Display
PID: 267874 (2R1Q3/1prn1p2/q4Pb1/P1PkNP1R/Pnp2P2/1B1p1P2/1K6/6B1 w - - 0 1)

Dame, Pierre

Simonet, Andre

Probleemblad, 1985

2R1Q3/1prn1p2/q4Pb1/P1PkNP1R/Pnp2P2/1B1p1P2/1K6/6B1

#2

14 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Bxc4#
    • 1...Qb6
      • 2.Bxc4#
    • 1...Qc6
      • 2.Bxc4#
    • 1...Qd6
      • 2.Bxc4#
    • 1...Qe6
      • 2.Bxc4#
    • 1...Qxf6
      • 2.Bxc4#
    • 1...Qa7
      • 2.Bxc4#
    • 1...Qa8
      • 2.Bxc4#
  • Tries
    • 1.Sxd7?
      • threat
        • 2.Qe4#
      • 1...Qxf6+
        • 2.Sxf6#
      • 1...Kc6
        • 2.Sb6#
      • 1...Rxc5
        • 2.Qe5#
      • 1...Qe6!
    • 1.Qxd7+?
      • 1...Qd6
        • 2.Bxc4#
        • 2.Qxd6#
      • 1...Rxd7!
    • 1.Qxf7+?
      • 1...Qe6
        • 2.Bxc4#
        • 2.Qxe6#
      • 1...Bxf7!
    • 1.Qe6+?
      • 1...Qxe6
        • 2.Bxc4#
      • 1...fxe6!
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Qe4#
      • 1...Qxf6+
        • 2.Se5#
      • 1...Kc6
        • 2.Se5#
      • 1...Sxc5
        • 2.fxg6#
      • 1...Sxf6
        • 2.Sb6#
      • 1...Qe6
        • 2.Se5#
      • 1...Se5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(e);N_GUARD,XP(G)::B(C),XP(c)
    • Q(e);N_GUARD::B(C),XP(c)
    • Q(e);N_GUARD,P_PINS(I),XP(L)::B(C),XP(c)
  • Tries
    • Try
      • S(I);XS(i)
      • Threat
        • QAB1(N)
      • Vars
        • Q(e);CHECK,XP(L)::S(I),XQ(e)
        • K(d);N_SPINP(c),P_SPINR(h),S_CUTQ(e),S_FLIGHT::QAB(N)+S(I)
        • R(h);XP(H)::QAR1(N)
      • Refutation
        • Q(e);
    • Try
      • Q(N);CHECK,XS(i)
      • Refutation
        • R(h);XQ(N)
    • Try
      • Q(N);CHECK,XP(j)
      • Refutation
        • B(f);XQ(N)
    • Try
      • Q(N);CHECK
      • Vars
        • Q(e);XQ(N)::B(C),XP(c)
      • Refutation
        • P(j);XQ(N)
  • Actual
    • S(I);XP(c)
    • Threat
      • QAB1(N)
    • Vars
      • Q(e);CHECK,N_GUARD,XP(L)::B(C)+S(I)
      • K(d);P_SPINR(h),P_SPINS(i),S_CUTQ(e),S_FLIGHT::S(I)
      • S(i);N_GUARD,XP(H)::R(K)+P(J),XB(f)
      • S(i);XP(L)::B(C)+S(I),DCHECK
      • Q(e);N_GUARD::B(C)+S(I)
      • S(i);::B(C)+S(I),DCHECK
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