MESON Chess Problem Database

Problem Display
PID: 121543 (5B2/K6B/5Q2/8/8/pk6/8/8 w - - 0 1)

Dehler, Ernst Georg

Tijdschrift vd NSB, 1901

5B2/K6B/5Q2/8/8/pk6/8/8

#2

4 + 2

6490 yacpdb 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Bg8+?
      • 1...Ka4
        • 2.Qa6#
      • 1...Kc2!
    • 1.Qc3+?
      • 1...Ka2
        • 2.Qxa3#
      • 1...Ka4
        • 2.Qb4#
      • 1...Kxc3!
    • 1.Qd4?
      • 1...a2
        • 2.Qb4#
      • 1...Ka2!
    • 1.Qe7?
      • 1...Ka2
        • 2.Qxa3#
      • 1...Kb2
        • 2.Qxa3#
      • 1...Kc3
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...a2
        • 2.Qb4#
      • 1...Kc4!
    • 1.Qf3+?
      • 1...Ka2
        • 2.Qxa3#
      • 1...Kb2
        • 2.Qxa3#
      • 1...Kc4
        • 2.Qd3#
      • 1...Ka4!
    • 1.Qb6+?
      • 1...Ka2
        • 2.Qb1#
      • 1...Kc3
        • 2.Qb4#
      • 1...Ka4
        • 2.Bc2#
        • 2.Qb4#
      • 1...Kc4!
  • Keys
    • 1.Qd6!
      • 1...Ka2
        • 2.Qxa3#
      • 1...Kb2
        • 2.Qxa3#
      • 1...Kc3
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4
        • 2.Qd3#
      • 1...a2
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A),XP(a)
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Vars
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAR1(A),XP(a)
        • K(b);P-FLIGHT::QAB1(A),XP(a)
        • K(b);P-FLIGHT::QAB1(A)
        • K(b);S_FLIGHT::QAR1(A)
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A),XP(a)
        • K(b);OGATE,P-FLIGHT::QAB1(A),XP(a)
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAR1(A),XP(a)
      • K(b);P-FLIGHT::QAB1(A),XP(a)
      • K(b);P-FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);SBLOCK::QAR1(A)
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