MESON Chess Problem Database

Problem Display
PID: 183188 (8/8/3PP3/4kp2/2RNpN2/1Q6/7K/8 w - - 0 1)

van Dijk, Johannes

Skakbladet, 1907

8/8/3PP3/4kp2/2RNpN2/1Q6/7K/8

#2

7 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Qg3#
  • Tries
    • 1.Sb5?
      • 1...Kxf4
        • 2.Qg3#
      • 1...e3
        • 2.Qb2#
        • 2.Qc3#
      • 1...Kf6!
    • 1.Sc6+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Qb8#
      • 1...Kf6!
    • 1.Qb2?
      • 1...Kxd6
        • 2.Sxf5#
      • 1...Kf6
        • 2.Sf3#
      • 1...e3
        • 2.Sb5#
      • 1...Kxf4!
  • Keys
    • 1.Qc3!
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Sxf5#
      • 1...Kf6
        • 2.Sf3#
      • 1...e3
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(E)::QAB1(B)
  • Tries
    • Try
      • S(D);
      • Vars
        • K(b);OGATEB,P_SPINP(a),S_FLIGHT,XS(E)::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT,XS(E)::QAB1(B)
        • K(b);S_FLIGHT,XP(F)::QAB(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT,XP(F)::S(D),XP(c)
        • K(b);S_FLIGHT::QAB(B)+S(D)
        • P(a);::QAB(B)+S(D)
      • Refutation
        • K(b);S_FLIGHT,XS(E)
  • Actual
    • Q(B);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(E)::QAB1(B)
      • K(b);S_FLIGHT,XP(F)::S(D),XP(c)
      • K(b);S_FLIGHT::QAB(B)+S(D)
      • P(a);::QAB(B)+S(D)
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