MESON Chess Problem Database

Problem Display
PID: 85682 (8/8/8/4p2B/3pQ3/3K3N/4N2k/8 w - - 0 1)

Speckmann, Werner

Sachsische Zeitung, 1979

8/8/8/4p2B/3pQ3/3K3N/4N2k/8

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh3
      • 2.Qh1#
  • Tries
    • 1.Kc2?
      • 1...Kxh3
        • 2.Qh1#
      • 1...d3+!
    • 1.Kd2?
      • 1...Kxh3
        • 2.Qh1#
      • 1...d3!
    • 1.Kc4?
      • 1...Kxh3
        • 2.Qh1#
      • 1...d3!
    • 1.Qd5?
      • 1...Kxh3
        • 2.Qh1#
      • 1...e4+!
    • 1.Qc6?
      • 1...Kxh3
        • 2.Qh1#
      • 1...e4+!
    • 1.Qg6?
      • 1...Kh1
        • 2.Qg1#
      • 1...Kxh3
        • 2.Qg3#
      • 1...e4+!
    • 1.Qb7?
      • 1...Kxh3
        • 2.Qh1#
      • 1...e4+!
    • 1.Qa8?
      • 1...Kxh3
        • 2.Qh1#
      • 1...e4+!
    • 1.Qg4?
      • 1...Kh1
        • 2.Qg1#
      • 1...e4+!
    • 1.Qxe5+?
      • 1...Kh1
        • 2.Bf3#
      • 1...Kxh3
        • 2.Qg3#
      • 1...Kg2!
  • Keys
    • 1.Bf3!
      • 1...Kxh3
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XS(C)::QAR2(D)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR2(D)
      • Refutation
        • P(b);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR2(D)
      • Refutation
        • P(b);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR2(D)
      • Refutation
        • P(b);
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR2(D)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR2(D)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • K(a);P-FLIGHT,XS(C)::QAR1(D)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR2(D)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT,XS(C)::QAR2(D)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(D);CHECK,XP(c)
      • Vars
        • K(a);P-FLIGHT::B(E)
        • K(a);P-FLIGHT,XS(C)::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(E);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(C)::QAR(D)
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