MESON Chess Problem Database

Problem Display
PID: 110689 (bB1K4/3p4/2kp4/P4Q2/1P6/8/8/8 w - - 0 1)

Fastosky, Pedro

Revista de Sah, 1956

bB1K4/3p4/2kp4/P4Q2/1P6/8/8/8

#2

5 + 4

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kb7
      • 2.Qb5#
    • 1...Bb7
      • 2.b5#
    • 1...d5
      • 2.Qxd7#
  • Tries
    • 1.Ke7?
      • 1...d5
        • 2.Qxd7#
      • 1...Bb7
        • 2.b5#
      • 1...Kb7!
    • 1.Kc8?
      • threat
        • 2.b5#
      • 1...d5
        • 2.Qxd7#
      • 1...Bb7+!
    • 1.Ke8?
      • 1...d5
        • 2.Qxd7#
      • 1...Bb7
        • 2.b5#
      • 1...Kb7!
    • 1.Ba7?
      • 1...d5
        • 2.Qxd7#
      • 1...Bb7
        • 2.b5#
      • 1...Kb7!
    • 1.Qf1?
      • 1...Kb7
        • 2.Qb5#
      • 1...Bb7
        • 2.Qc4#
      • 1...d5
        • 2.Qa6#
      • 1...Kd5!
    • 1.Qc5+?
      • 1...Kb7
        • 2.Qb6#
        • 2.Qb5#
        • 2.Qc8#
      • 1...dxc5!
    • 1.Qg5?
      • 1...Kb7
        • 2.Qb5#
      • 1...Bb7
        • 2.b5#
      • 1...d5!
    • 1.Qh5?
      • 1...Kb7
        • 2.Qb5#
      • 1...Bb7
        • 2.b5#
      • 1...d5!
  • Keys
    • 1.Qd3!
      • 1...Kb7
        • 2.Qb5#
      • 1...Bb7
        • 2.Qc4#
      • 1...d5
        • 2.Qa6#

This anticipates 172341(1996)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(C)
    • B(d);SBLOCK::P(A)
    • P(b);::QAB1(C),XP(c)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • P(b);::QAB1(C),XP(c)
        • B(d);SBLOCK::P(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(E);P-FLIGHT
      • Threat
        • P(A)
      • Vars
        • P(b);::QAB1(C),XP(c)
      • Refutation
        • B(d);CHECK
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(b);::QAB1(C),XP(c)
        • B(d);SBLOCK::P(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);
      • Vars
        • P(b);::QAB1(C),XP(c)
        • B(d);SBLOCK::P(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
        • B(d);SBLOCK::QAR2(C)
        • P(b);SBLOCK::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • P(b);XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
        • B(d);SBLOCK::P(A)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
        • B(d);SBLOCK::P(A)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAR2(C)
      • B(d);SBLOCK::QAR2(C)
      • P(b);SBLOCK::QAR2(C)
HTML5 logo

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).