MESON Chess Problem Database

Problem Display
PID: 177753 (8/5n2/8/2p5/k7/4Kn2/8/1R4Q1 w - - 0 1)

Zakharov, O

Sahs (Latvia), 1985

8/5n2/8/2p5/k7/4Kn2/8/1R4Q1

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Ka5!
    • 1.Qf1?
      • threat
        • 2.Qa6#
      • 1...Ka3
        • 2.Qa6#
      • 1...Ka5
        • 2.Qb5#
      • 1...c4!
    • 1.Qg2?
      • threat
        • 2.Qa2#
      • 1...Ka5
        • 2.Qa2#
      • 1...Sd2
        • 2.Qa8#
      • 1...Ka3!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qa8#
      • 1...Ka3
        • 2.Qa8#
      • 1...Ka5
        • 2.Qa8#
      • 1...Sd8
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(b);P-FLIGHT::QAR(B)
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(b);P-FLIGHT::QAR(B)
        • S(a);OGATE::QAR(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • K(b);P-FLIGHT::QAR(B)
      • S(d);OGATE::QAR2(B)
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