MESON Chess Problem Database

Problem Display
PID: 195751 (8/1rnbq3/2p2p1Q/P1k1BR1p/K3Pn2/1pPP1N1p/4p3/8 w - - 0 1)

van Beek, Huibrecht

Haagsche Post, 1921

8/1rnbq3/2p2p1Q/P1k1BR1p/K3Pn2/1pPP1N1p/4p3/8

#2

9 + 12

15601 Albrecht-Leiss-Degener Collection 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Bd4#
    • 1...Qf8
      • 2.Qxf8#
    • 1...Qxe5
      • 2.Qf8#
    • 1...Rb4+
      • 2.cxb4#
    • 1...Sfe6
      • 2.Bxc7#
    • 1...Sg6
      • 2.Qe3#
    • 1...Sce6
      • 2.Bxf4#
  • Tries
    • 1.Bxf6+?
      • 1...Qe5
        • 2.Be7#
        • 2.Qf8#
      • 1...Bxf5
        • 2.Bd4#
        • 2.Bxe7#
      • 1...Sfd5
        • 2.Bd4#
        • 2.Bxe7#
      • 1...Scd5
        • 2.Bd4#
        • 2.Bxe7#
      • 1...Kd6!
    • 1.Bxc7+?
      • 1...Qe5
        • 2.Qf8#
      • 1...Sd5
        • 2.Qe3#
      • 1...Bxf5!
  • Keys
    • 1.Sd2!
      • threat
        • 2.d4#
      • 1...Rb4+
        • 2.cxb4#
      • 1...Qxe5
        • 2.Qf8#
      • 1...Sxd3
        • 2.Qe3#
      • 1...Qd6
        • 2.Bd4#
      • 1...Sfe6
        • 2.Bxc7#
      • 1...Sb5
        • 2.Sxb3#
      • 1...Sce6
        • 2.Bxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(l);SBLOCK::R(H)+B(G),DCHECK
    • Q(l);OGATEB::QAB(I),XQ(l)
    • Q(l);OGATEB,P_SPINQ(l),XB(G)::QAB(I)
    • R(i);CHECK,OGATE::P(A),XR(i)
    • S(d);N_GUARD,S_CUTB(k),S_CUTQ(l)::R(H)+B(G),XS(j)
    • S(d);OGATE::QAB(I)
    • S(j);N_GUARD,S_CUTB(k),S_CUTQ(l)::R(H)+B(G),XS(d)
  • Tries
    • Try
      • B(G);CHECK,XP(h)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • B(G);CHECK,XS(j)
      • Vars
        • Q(l);P_SPINQ(l),S_CUTB(k),S_CUTS(d)::QAB(I)
        • S(d);OGATE,P_SPINS(d)::QAB(I)
      • Refutation
        • B(k);XR(H)
  • Actual
    • S(C);
    • Threat
      • P(B)
    • Vars
      • R(i);CHECK,OGATE::P(A),XR(i)
      • Q(l);OGATEB,P_SPINQ(l),XB(G)::QAB(I)
      • S(d);OGATE,XP(B)::QAB(I)
      • Q(l);SBLOCK::R(H)+B(G),DCHECK
      • S(d);N_GUARD,S_CUTB(k),S_CUTQ(l)::R(H)+B(G),XS(j)
      • S(j);S_CUTR(i)::S(C),XP(b)
      • S(j);N_GUARD,S_CUTB(k),S_CUTQ(l)::R(H)+B(G),XS(d)
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