MESON Chess Problem Database

Problem Display
PID: 80735 (4B3/2b1p2p/3k4/8/4K3/8/8/6Q1 w - - 0 1)

Amirov, Talip Khasanovich

Vecherni Novosti, 1962

4B3/2b1p2p/3k4/8/4K3/8/8/6Q1

#2

3 + 4

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb6
      • 2.Qxb6#
    • 1...Bb8
      • 2.Qb6#
  • Tries
    • 1.Qh2+?
      • 1...Ke6
        • 2.Qh6#
      • 1...e5
        • 2.Qxe5#
      • 1...Kc5!
    • 1.Qa1?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd4#
      • 1...e5
        • 2.Qxe5#
      • 1...e6
        • 2.Qa3#
      • 1...Ke6!
    • 1.Qc1?
      • threat
        • 2.Qc6#
      • 1...Ke6
        • 2.Qh6#
      • 1...e6
        • 2.Qa3#
      • 1...e5!
    • 1.Qd1+?
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke6!
    • 1.Qg5?
      • threat
        • 2.Qd5#
        • 2.Qe5#
      • 1...Ke6
        • 2.Qh6#
      • 1...Ba5
        • 2.Qe5#
      • 1...Bb6
        • 2.Qe5#
      • 1...Bb8
        • 2.Qe5#
      • 1...Bd8
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...e6!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke6
        • 2.Qh6#
      • 1...e6
        • 2.Qf8#
      • 1...e5
        • 2.Qxe5#

Anticipated by 9387(1902), 17820(1951)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::QAR2(A),XB(b)
    • B(b);N_GUARD::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(c);P_SPINP(c)::QAB1(A),XP(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(c);::QAB1(A),XP(c)
        • P(c);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(c);SBLOCK::QAB(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • B(b);::QAB1(A)
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
      • P(c);::QAB1(A),XP(c)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).