MESON Chess Problem Database

Problem Display
PID: 95071 (8/8/4RNR1/1K3k2/5P2/8/4PQ1P/8 w - - 0 1)

Yachnik, A

Cherkasskaya Pravda, 1981

8/8/4RNR1/1K3k2/5P2/8/4PQ1P/8

#2

8 + 1

6490 yacpdb 2009
5454 Near Snap 2013
5454 Near Snap 2016

SOLUTION

  • SOUND
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg4#
      • 1...Kxf4
        • 2.Qf2#
        • 2.Qf1#
        • 2.Qg4#
        • 2.Qg5#
      • 1...Kxe6!
    • 1.Qd4?
      • threat
        • 2.Qe4#
      • 1...Kxe6
        • 2.Qd7#
      • 1...Kxg6!
    • 1.Qh4?
      • threat
        • 2.Qg4#
      • 1...Kxg6
        • 2.Qh7#
      • 1...Kxe6!
    • 1.Qb6?
      • 1...Kxf4
        • 2.Qf2#
      • 1...Kxg6!
    • 1.Qg2?
      • threat
        • 2.Qe4#
        • 2.Qg4#
      • 1...Kxf4
        • 2.Qf1#
        • 2.Qf3#
        • 2.Qe4#
        • 2.Qf2#
        • 2.Qg4#
        • 2.Qg5#
      • 1...Kxe6!
  • Keys
    • 1.Qa7!
      • 1...Kxf4
        • 2.Qf2#
      • 1...Kxe6
        • 2.Qd7#
      • 1...Kxg6
        • 2.Qh7#

Anticipated by 5144(1900)

This anticipates 156920(2014)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(F)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XR(H)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(H)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(D)::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT,XR(H)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
  • Actual
    • Q(B);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(D)::QAR2(B)
      • K(a);OGATEB,S_FLIGHT,XR(F)::QAB1(B)
      • K(a);OGATEB,S_FLIGHT,XR(H)::QAB1(B)
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