MESON Chess Problem Database

Problem Display
PID: 194961 (4n3/4P3/8/1p1pk3/1QpN2RB/K1N5/8/8 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1918

4n3/4P3/8/1p1pk3/1QpN2RB/K1N5/8/8

#2

7 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Bg3#
  • Tries
    • 1.Scxb5?
      • threat
        • 2.Qe1#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sf6
        • 2.Bg3#
        • 2.Qd6#
      • 1...c3!
    • 1.Qc5?
      • threat
        • 2.Re4#
        • 2.Qxd5#
      • 1...Sd6
        • 2.Qxd5#
      • 1...Sf6
        • 2.Bg3#
        • 2.Qc7#
      • 1...Sc7
        • 2.Re4#
        • 2.Qxc7#
      • 1...b4+!
  • Keys
    • 1.Se4!
      • 1...Kxd4
        • 2.Qc3#
      • 1...dxe4
        • 2.Qc5#
      • 1...Sd6
        • 2.Bf6#
      • 1...Sf6
        • 2.Bxf6#
      • 1...Sc7
        • 2.Bf6#
      • 1...Sg7
        • 2.Bf6#
      • 1...c3
        • 2.Bg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(e);SBLOCK::B(F)
  • Tries
    • Try
      • S(B);XP(b)
      • Threat
        • QAR(C)
      • Vars
        • S(e);N_GUARD::QAB1(C),XS(e)
      • Refutation
        • P(a);
    • Try
      • Q(C);P_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::QAR1(C),XP(c)
      • Refutation
        • P(b);CHECK
  • Actual
    • S(B);
    • Vars
      • K(d);OGATEB,P_SPINP(a),S_FLIGHT,XS(D)::QAB1(C)
      • P(c);OGATEB,XS(B)::QAR2(C)
      • S(e);N_GUARD::B(F)
      • S(e);N_GUARD::B(F),XS(e)
      • P(a);::B(F)
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