MESON Chess Problem Database

Problem Display
PID: 196772 (8/2p2KpB/prp5/2BkN3/8/p2N4/qP6/2Q3b1 w - - 0 1)

van Dijk, Johannes

Algemeen Handelsblad, 1919

8/2p2KpB/prp5/2BkN3/8/p2N4/qP6/2Q3b1

#2

7 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qc4#
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qa1
      • 2.Qc4#
    • 1...Qxb2
      • 2.Qc4#
    • 1...Rb3
      • 2.Qc4#
    • 1...Bf2
      • 2.Qh1#
    • 1...Bh2
      • 2.Qh1#
    • 1...Be3
      • 2.Qh1#
    • 1...Bd4
      • 2.Qh1#
    • 1...Bxc5
      • 2.Qxc5#
  • Tries
    • 1.Qg5?
      • threat
        • 2.Qd8#
        • 2.Qg2#
      • 1...Qxb2
        • 2.Qd8#
      • 1...Rxb2
        • 2.Qd8#
      • 1...g6
        • 2.Qg2#
      • 1...Qc4
        • 2.Sf3#
        • 2.Sg4#
        • 2.Sd7#
        • 2.Qd8#
      • 1...Rb4
        • 2.Qd8#
      • 1...Rb8
        • 2.Qg2#
      • 1...Bxc5!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf4#
      • 1...Bxc5
        • 2.Qxc5#
      • 1...g6
        • 2.Sf6#
      • 1...Qc4
        • 2.Qg5#
      • 1...Rb4
        • 2.Sxb4#
      • 1...Bh2
        • 2.Se3#
      • 1...Be3
        • 2.Sxe3#
      • 1...g5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::QAB1(A)
    • Q(b);N_GUARD::QAB1(A),XQ(b)
    • Q(b);N_GUARD,XP(B)::QAB1(A)
    • R(f);S_CUTQ(b)::QAB1(A)
    • B(a);OGATE::QAB(A)
    • B(a);OGATE,XB(D)::QAR1(A),XB(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XP(B)::QAR(A)
        • R(f);XP(B)::QAR(A)
        • P(i);::QAB(A)
        • R(f);::QAR(A)
        • R(f);::QAB(A)
      • Refutation
        • B(a);XB(D)
  • Actual
    • S(E);
    • Threat
      • S(C)
    • Vars
      • B(a);OGATE,XB(D)::QAR1(A),XB(a)
      • P(i);N_GUARD::S(E)
      • Q(b);SBLOCK::QAR(A)
      • R(f);N_GUARD::S(C),XR(f)
      • B(a);N_GUARD::S(E)
      • B(a);N_GUARD::S(E),XB(a)
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