MESON Chess Problem Database

Problem Display
PID: 247167 (2Q5/1K1pp3/3k4/7R/8/8/8/8 w - - 0 1)

Pikhurov, Dimitry Egorovich

Uralski Problemist, 1998

2Q5/1K1pp3/3k4/7R/8/8/8/8

#2

3 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e6
      • 2.Qc5#
      • 2.Qf8#
  • Tries
    • 1.Re5?
      • threat
        • 2.Qc5#
        • 2.Qc7#
        • 2.Qb8#
      • 1...e6
        • 2.Qc5#
      • 1...Kxe5!
    • 1.Qc2?
      • 1...Ke6
        • 2.Qg6#
      • 1...e6
        • 2.Qc5#
      • 1...e5!
    • 1.Qc3?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...e6
        • 2.Qb4#
        • 2.Qa3#
        • 2.Qc5#
      • 1...Ke6!
    • 1.Qc4?
      • threat
        • 2.Qd5#
        • 2.Qa6#
      • 1...e6
        • 2.Qb4#
        • 2.Qc5#
      • 1...e5!
    • 1.Qg8?
      • threat
        • 2.Rd5#
        • 2.Qd5#
      • 1...e6
        • 2.Qf8#
      • 1...e5!
    • 1.Qh8?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...e6
        • 2.Qf8#
      • 1...Ke6!
  • Keys
    • 1.Qe8!
      • 1...Ke6
        • 2.Qg6#
      • 1...e5
        • 2.Qxe5#
      • 1...e6
        • 2.Qf8#

Anticipated by 227818(1926), 86898(1975)

This anticipates 250761(1999)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(c);SBLOCK::QAB1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(c);::QAB1(C),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(c);::QAB1(C),XP(c)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(c)::QAR2(C)
      • P(c);OGATE::QAB1(C),XP(c)
      • P(c);OGATEB,SBLOCK::QAB(C)
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