MESON Chess Problem Database

Problem Display
PID: 118247 (8/4Q3/8/8/8/2B1pP1K/5kB1/8 w - - 0 1)

Pypa, Volodimir Iosifovich

Industrialnoje Zaporozie, 1967

8/4Q3/8/8/8/2B1pP1K/5kB1/8

#2

5 + 2

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Kg1
      • 2.Qxe3#
    • 1...e2
      • 2.Qc5#
      • 2.Qa7#
  • Tries
    • 1.Kh2?
      • 1...e2
        • 2.Qc5#
        • 2.Qa7#
      • 1...Ke2!
    • 1.Bb4?
      • 1...Kg1
        • 2.Qxe3#
      • 1...e2
        • 2.Qc5#
        • 2.Qa7#
      • 1...Ke2!
    • 1.Ba5?
      • 1...Kg1
        • 2.Qxe3#
      • 1...e2
        • 2.Qc5#
        • 2.Qa7#
      • 1...Ke2!
    • 1.Qh4+?
      • 1...Kg1
        • 2.Qe1#
      • 1...Ke2!
    • 1.Qc5?
      • 1...Kg1
        • 2.Qxe3#
      • 1...Ke2!
    • 1.Qg5?
      • 1...Kg1
        • 2.Qxe3#
      • 1...e2
        • 2.Qc5#
      • 1...Ke2!
    • 1.Qe5?
      • 1...Kg1
        • 2.Qxe3#
      • 1...e2
        • 2.Qd4#
        • 2.Qc5#
      • 1...Ke2!
    • 1.Qe6?
      • 1...Kg1
        • 2.Qxe3#
      • 1...e2
        • 2.Qb6#
      • 1...Ke2!
    • 1.Qa7?
      • 1...Kg1
        • 2.Qxe3#
      • 1...Ke2!
    • 1.Qh7?
      • 1...Ke2
        • 2.Qc2#
      • 1...e2
        • 2.Qa7#
      • 1...Kg1!
    • 1.f4?
      • 1...Kg1
        • 2.Qxe3#
      • 1...e2
        • 2.Qc5#
        • 2.Qa7#
      • 1...Ke2!
  • Keys
    • 1.Qe4!
      • 1...Kg1
        • 2.Qxe3#
      • 1...Ke2
        • 2.Qc2#
      • 1...e2
        • 2.Qd4#

Anticipated by 9537(1905), 203397(1924), 47999(1948)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(E),XP(b)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
        • P(b);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
        • P(b);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);S_FLIGHT::QAB(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB(E),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR2(E)
      • P(b);OGATEB,SBLOCK::QAB(E)
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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).