MESON Chess Problem Database

Problem Display
PID: 202499 (8/8/4p1N1/1p2P3/1B1kp3/8/K3B1Q1/8 w - - 0 1)

Lobel, Ernst

Volk und Zeit, 1923

8/8/4p1N1/1p2P3/1B1kp3/8/K3B1Q1/8

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Bxb5?
      • threat
        • 2.Qd2#
      • 1...Ke3
        • 2.Bc5#
      • 1...Kd5
        • 2.Qd2#
      • 1...e3!
    • 1.Qg1+?
      • 1...Kd5
        • 2.Qc5#
      • 1...e3!
    • 1.Qf2+?
      • 1...Kd5
        • 2.Qc5#
      • 1...e3!
  • Keys
    • 1.Bc4!
      • 1...Ke3
        • 2.Bc5#
      • 1...Kxc4
        • 2.Qxe4#
      • 1...bxc4
        • 2.Qd2#
      • 1...e3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);XP(c)
      • Threat
        • QAR2(C)
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);P-FLIGHT,P_SPINP(b)::QAR(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • B(B);
    • Vars
      • K(a);S_FLIGHT::B(D)
      • K(a);P-FLIGHT,XB(B)::QAR2(C),XP(b)
      • P(c);SBLOCK,XB(B)::QAR2(C)
      • P(b);OGATEB,SBLOCK::QAR(C)
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