MESON Chess Problem Database

Problem Display
PID: 187962 (7Q/2p2K2/3kB3/8/8/1N1P4/8/8 w - - 0 1)

Wendt, Valentin

Deutsche Schachblatter, 1910

7Q/2p2K2/3kB3/8/8/1N1P4/8/8

#2

5 + 2

6490 yacpdb 2019
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.Qh2#
      • 2.Qb8#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...c6!
    • 1.Qh1?
      • threat
        • 2.Qd5#
      • 1...Ke5
        • 2.Qh2#
      • 1...c6
        • 2.Qh2#
      • 1...c5!
    • 1.Qh5?
      • threat
        • 2.Qc5#
        • 2.Qd5#
      • 1...c5
        • 2.Qxc5#
      • 1...c6
        • 2.Qh2#
      • 1...Kc6!
    • 1.Qb8?
      • 1...Ke5
        • 2.Qxc7#
      • 1...Kc6!
    • 1.Qd8+?
      • 1...Ke5
        • 2.Qxc7#
        • 2.Qd4#
      • 1...Kc6!
  • Keys
    • 1.Qc8!
      • 1...Ke5
        • 2.Qxc7#
      • 1...Kc6
        • 2.Qa6#
      • 1...c5
        • 2.Qxc5#
      • 1...c6
        • 2.Qb8#

This anticipates 230279(2000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(b);::QAB1(E),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);S_FLIGHT::QAB(E)
        • P(b);SBLOCK::QAB(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(E),XP(b)
        • P(b);SBLOCK::QAB(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB(E),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR2(E)
      • P(b);OGATE::QAB1(E),XP(b)
      • P(b);OGATEB,SBLOCK::QAB(E)
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