MESON Chess Problem Database

Problem Display
PID: 175530 (4b2K/5k2/8/1R4B1/Q7/8/8/8 w - - 0 1)

Zimmermann, Stepan

Source?, 1900

4b2K/5k2/8/1R4B1/Q7/8/8/8

#2

4 + 2

6490 yacpdb 2018
3713 Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qb3+?
      • 1...Kf8
        • 2.Qg8#
      • 1...Kg6!
    • 1.Qa2+?
      • 1...Kf8
        • 2.Qg8#
      • 1...Kg6!
    • 1.Qc4+?
      • 1...Kf8
        • 2.Qg8#
      • 1...Kg6!
    • 1.Qa7+?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kg6
        • 2.Qh7#
      • 1...Kf8
        • 2.Bh6#
        • 2.Qe7#
        • 2.Qg7#
      • 1...Bd7!
  • Keys
    • 1.Qa8!
      • 1...Ke6
        • 2.Qd5#
      • 1...Kg6
        • 2.Qxe8#
      • 1...Kf8
        • 2.Rf5#
      • 1...Bxb5
        • 2.Qg8#
      • 1...Bc6
        • 2.Qg8#
      • 1...Bd7
        • 2.Qg8#

This anticipates 198648(1921)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAB(A),XB(b)
      • K(a);P-FLIGHT,P_SPINB(b)::R(B)
      • B(b);OGATE,XR(B)::QAB1(A)
      • B(b);OGATE::QAB1(A)
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