MESON Chess Problem Database

Problem Display
PID: 193560 (8/8/B1K5/4p3/3k4/7Q/3N4/2nn4 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1915

8/8/B1K5/4p3/3k4/7Q/3N4/2nn4

#2

4 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qd3#
    • 1...Se2
      • 2.Qd3#
    • 1...Sb3
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
  • Tries
    • 1.Sb3+?
      • 1...Sxb3
        • 2.Qd3#
      • 1...Ke4!
    • 1.Qa3?
      • threat
        • 2.Qc5#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sb3!
  • Keys
    • 1.Sf1!
      • 1...Ke4
        • 2.Qg4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sb2
        • 2.Qe3#
      • 1...Sa2
        • 2.Qd3#
      • 1...Se2
        • 2.Qd3#
      • 1...Sb3
        • 2.Qd3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Sc3
        • 2.Qe3#
      • 1...e4
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • S(a);XS(A)::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • S(a);
  • Actual
    • S(A);
    • Vars
      • K(c);P-FLIGHT::QAR2(B)
      • S(a);N_GUARD::QAR1(B),XS(a)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • S(b);N_GUARD::QAB1(B)
      • S(a);N_GUARD::QAR1(B)
      • P(d);OGATEB,SBLOCK::QAB(B)
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