MESON Chess Problem Database

Problem Display
PID: 258881 (1BBQ4/3b1r2/p2nN3/r2k3q/p3p1p1/4p3/K1R4n/1N3R2 w - - 0 1)

Postma, Bernardus

Probleemblad, 1948

1BBQ4/3b1r2/p2nN3/r2k3q/p3p1p1/4p3/K1R4n/1N3R2

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5
      • 2.Rc5#
      • 2.Qxd6#
    • 1...Bc6
      • 2.Qxd6#
    • 1...Bxe6
      • 2.Qxd6#
    • 1...Bxc8
      • 2.Qxd6#
    • 1...Be8
      • 2.Qxd6#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Qxd6#
      • 1...Ke5
        • 2.Qxd6#
      • 1...Kxe6
        • 2.Qxd6#
      • 1...Sxc8
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sb5
        • 2.Qc4#
      • 1...Sf5
        • 2.Qe5#
        • 2.Qc4#
      • 1...Sb7
        • 2.Qc4#
      • 1...Se8
        • 2.Qc4#
      • 1...Qe5!
    • 1.Qxd7?
      • threat
        • 2.Qxd6#
      • 1...Ke5
        • 2.Qxd6#
      • 1...Qe5
        • 2.Bb7#
        • 2.Qc6#
      • 1...Rxd7!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qxd6#
      • 1...Ke5
        • 2.Qxd6#
      • 1...Kxe6
        • 2.Qxd6#
      • 1...Sxc8
        • 2.Rd1#
      • 1...Qe5
        • 2.Sc7#
      • 1...Bc6
        • 2.Qd4#
      • 1...Sc4
        • 2.Sc3#
      • 1...Sb5
        • 2.Rc5#
      • 1...Sf5
        • 2.Sf4#
      • 1...Sb7
        • 2.Rd1#
      • 1...Se8
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 3
  • Sets
    • B(k);OGATE,P_SPINS(j)::QAR1(H),XS(j)
    • B(k);OGATE,P_SPINS(j),XS(E)::QAR1(H),XS(j)
    • B(k);OGATE,P_SPINS(j),XB(G)::QAR1(H),XS(j)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR1(H),XS(j)
      • Vars
        • K(g);P-FLIGHT,P_SPINS(j)::QAB1(H),XS(j)
        • K(g);P_SPINB(k),S_FLIGHT,XS(E)::QAR1(H),XS(j)
        • S(j);N_GUARD,XB(G)::QAB1(H)
        • S(j);N_GUARD::QAB1(H),XS(j)
        • S(j);N_GUARD::QAB1(H)
      • Refutation
        • Q(h);
    • Try
      • Q(H);P_PINS(j),XB(k)
      • Threat
        • QAR1(H),XS(j)
      • Vars
        • K(g);P-FLIGHT::QAB1(H),XS(j)
      • Refutation
        • R(l);N_SPINS(j),XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H),XS(j)
    • Vars
      • K(g);P-FLIGHT,P_SPINS(j)::QAB1(H),XS(j)
      • K(g);P_SPINB(k),P_SPINS(j),S_FLIGHT,XS(E)::QAR1(H),XS(j)
      • S(j);XB(G)::R(B)
      • Q(h);SBLOCK::S(E)
      • B(k);::QAR1(H)
      • S(j);SBLOCK::S(A)
      • S(j);S_CUTR(f)::R1(D)
      • S(j);S_CUTR(l)::S(E)
      • S(j);::R(B)
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Developed and maintained by Brian Stephenson.
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