MESON Chess Problem Database

Problem Display
PID: 250394 (4k3/1p6/4K3/3p1p2/8/4Q3/8/8 w - - 0 1)

Surkov, Valery Albertovich

Uralski Problemist, 2009

4k3/1p6/4K3/3p1p2/8/4Q3/8/8

#2

2 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...Kd8!
    • 1.Qf4?
      • threat
        • 2.Qb8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8!
    • 1.Qa7?
      • threat
        • 2.Qb8#
        • 2.Qa8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8!
    • 1.Qc3?
      • threat
        • 2.Qh8#
        • 2.Qc8#
      • 1...Kf8
        • 2.Qh8#
      • 1...d4
        • 2.Qc8#
      • 1...Kd8!
    • 1.Qg3?
      • threat
        • 2.Qb8#
        • 2.Qg8#
      • 1...Kd8
        • 2.Qb8#
      • 1...f4
        • 2.Qg8#
      • 1...Kf8!
    • 1.Qh3?
      • threat
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...Kd8!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qb8#
        • 2.Qh8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(a)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
        • P(a);::QAR2(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
        • P(b);::QAR2(A)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);P-FLIGHT::QAR2(A)
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