MESON Chess Problem Database

Problem Display
PID: 172254 (3k4/8/2pK2b1/8/2Q5/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kubanski krai, 1996

3k4/8/2pK2b1/8/2Q5/8/8/8

#2

2 + 3

6490 yacpdb 2018
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke8
      • 2.Qg8#
    • 1...Bb1
      • 2.Qg8#
    • 1...Bc2
      • 2.Qg8#
    • 1...Bd3
      • 2.Qg8#
    • 1...Be4
      • 2.Qg8#
    • 1...Bf5
      • 2.Qg8#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qb8#
      • 1...Ke8
        • 2.Qg8#
      • 1...Bf5
        • 2.Qg8#
      • 1...Kc8!
    • 1.Qe6?
      • threat
        • 2.Qd7#
      • 1...Bf5
        • 2.Qg8#
      • 1...Be8!
    • 1.Qf7?
      • threat
        • 2.Qd7#
      • 1...Kc8
        • 2.Qc7#
      • 1...Bf5
        • 2.Qg8#
        • 2.Qf8#
      • 1...Bxf7!
    • 1.Qh4+?
      • 1...Ke8
        • 2.Qe7#
      • 1...Kc8!
    • 1.Qxc6?
      • threat
        • 2.Qd7#
        • 2.Qa8#
      • 1...Be8
        • 2.Qa8#
        • 2.Qc7#
      • 1...Be4
        • 2.Qd7#
      • 1...Bf5!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qa8#
      • 1...Kc8
        • 2.Qa8#
      • 1...Ke8
        • 2.Qg8#
      • 1...Bf5
        • 2.Qg8#

Anticipated by 47227(1849), 110515(1870), 36807(1898), 183106(1907), 193729(1916), 166257(1917), 149134(1929)

This anticipates 173962(2005), 169981(2017)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
    • B(b);N_GUARD::QAR(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • B(b);N_GUARD::QAR(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(b);N_GUARD::QAR(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • B(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAR1(A)
      • Refutation
        • B(b);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
      • B(b);N_GUARD::QAR(A)
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