MESON Chess Problem Database

Problem Display
PID: 187632 (8/4K3/8/4N3/1P1kp3/6Q1/6B1/8 w - - 0 1)

Freimann, Fritz

La Strategie, 1909

8/4K3/8/4N3/1P1kp3/6Q1/6B1/8

#2

5 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Kf6?
      • 1...Kd5
        • 2.Qd3#
      • 1...e3!
    • 1.Qf4?
      • 1...Kd5
        • 2.Qxe4#
      • 1...Kc3!
    • 1.Qc3+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kxc3!
    • 1.Qd3+?
      • 1...Kxe5
        • 2.Qxe4#
      • 1...exd3!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Qc5#
        • 2.Qxe4#
      • 1...Kxe5
        • 2.Qxe4#
      • 1...Kxe3!
  • Keys
    • 1.Qe1!
      • 1...Kd5
        • 2.Qxe4#
      • 1...Kxe5
        • 2.Qxe4#
      • 1...e3
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);P_PINP(b)
      • Vars
        • K(a);P-FLIGHT::QAB1(B),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAR1(B),XP(b)
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT,XS(D)::QAR1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::QAB1(B),XP(b)
      • K(a);P_SPINP(b),S_FLIGHT,XS(D)::QAR1(B),XP(b)
      • P(b);SBLOCK::QAB(B)
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