MESON Chess Problem Database

Problem Display
PID: 148276 (1Br1rN2/pQpPpn2/2Bkn3/3p1q1b/4P3/3N4/K4b2/8 w - - 0 1)

Goldstein, Alexander

Probleemblad, 1954

1Br1rN2/pQpPpn2/2Bkn3/3p1q1b/4P3/3N4/K4b2/8

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sed8
      • 2.dxe8S#
    • 1...Sfd8
      • 2.dxc8S#
  • Tries
    • 1.Bb5?
      • threat
        • 2.Qc6#
      • 1...Sed8
        • 2.dxe8S#
      • 1...Se5
        • 2.Qxd5#
      • 1...Sfd8
        • 2.dxc8S#
      • 1...Sd4!
    • 1.Bxd5?
      • threat
        • 2.Qc6#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...Sd4
        • 2.Qb4#
      • 1...Sed8
        • 2.dxe8S#
      • 1...Sfd8
        • 2.dxc8S#
      • 1...Se5!
    • 1.Bxc7+?
      • 1...Rxc7
        • 2.dxe8S#
      • 1...Sxc7!
  • Keys
    • 1.Ba4!
      • threat
        • 2.Qc6#
      • 1...Sd4
        • 2.Qb4#
      • 1...Sed8
        • 2.dxe8S#
      • 1...Se5
        • 2.Qxd5#
      • 1...Sfd8
        • 2.dxc8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(f);S_CUTR(k)::PXR(l)=S
    • S(j);S_CUTR(l)::PXR(k)=S
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(E)
      • Vars
        • S(f);S_CUTR(k)::PXR(l)=S
        • S(j);S_CUTQ(c)::QAR1(E),XP(b)
        • S(j);S_CUTR(l)::PXR(k)=S
      • Refutation
        • S(f);
    • Try
      • B(D);XP(b)
      • Threat
        • QAR1(E)
      • Vars
        • Q(c);CHECK,OGATE,XB(D)::QAR1(E),XQ(c)
        • S(f);N_GUARD,S_CUTB(a)::QAB(E)
        • S(f);S_CUTR(k)::PXR(l)=S
        • S(j);S_CUTR(l)::PXR(k)=S
      • Refutation
        • S(j);
    • Try
      • B(G);CHECK,XP(h)
      • Vars
        • R(k);N_GUARD,S_CUTS(f),XB(G)::PXR(l)=S
      • Refutation
        • S(f);XB(G)
  • Actual
    • B(D);
    • Threat
      • QAR1(E)
    • Vars
      • S(f);N_GUARD,S_CUTB(a)::QAB(E)
      • S(f);S_CUTR(k)::PXR(l)=S
      • S(j);S_CUTQ(c)::QAR1(E),XP(b)
      • S(j);S_CUTR(l)::PXR(k)=S
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