MESON Chess Problem Database

Problem Display
PID: 190104 (8/8/4bp2/4k3/1K1R4/3P4/8/Q7 w - - 0 1)

Vetter, Hans

Deutsches Wochenschach, 1913

8/8/4bp2/4k3/1K1R4/3P4/8/Q7

#2

4 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1+?
      • 1...Kxd4
        • 2.Qe4#
      • 1...Kf5!
    • 1.Qa5+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Kxd4!
    • 1.Qa8?
      • threat
        • 2.Qe4#
      • 1...Kxd4
        • 2.Qe4#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bf5
        • 2.Qd5#
      • 1...f5
        • 2.Qh8#
      • 1...Kf5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qe4#
      • 1...Kxd4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qh5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bf5
        • 2.Qd5#
      • 1...f5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(D)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(A),XB(b)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT,XR(D)::QAR1(A)
        • B(b);N_GUARD::QAR1(A),XB(b)
        • B(b);N_GUARD,SBLOCK::QAR1(A)
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);S_FLIGHT,XR(D)::QAR1(A)
      • K(a);P-FLIGHT::QAR2(A)
      • B(b);N_GUARD::QAR1(A),XB(b)
      • B(b);N_GUARD,SBLOCK::QAR1(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
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