MESON Chess Problem Database

Problem Display
PID: 223339 (3r3B/2N5/r1b1P3/2ppPp2/3kpK2/4p3/Q3B3/b2N4 w - - 0 1)

May, Willy Paul

Suomen Shakki, 1955

3r3B/2N5/r1b1P3/2ppPp2/3kpK2/4p3/Q3B3/b2N4

#2

8 + 10

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.exd6#
    • 1...Bb2
      • 2.Qxb2#
    • 1...Ba4
      • 2.Qxa1#
    • 1...Bb5
      • 2.Sxb5#
    • 1...Bb7
      • 2.Sb5#
    • 1...Bd7
      • 2.Qxd5#
    • 1...Ba8
      • 2.Sb5#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qxe3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Ra3!
    • 1.Qxd5+?
      • 1...Bxd5
        • 2.Sb5#
      • 1...Rxd5!
    • 1.Qa3?
      • threat
        • 2.Qxe3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Rxa3!
  • Keys
    • 1.e7!
      • threat
        • 2.Se6#
      • 1...Rd6
        • 2.exd6#
        • 2.e6#
      • 1...Ba4
        • 2.Qxa1#
      • 1...Bb5
        • 2.Sxb5#
      • 1...Bb7
        • 2.Sb5#
      • 1...Bd7
        • 2.Qxd5#
      • 1...Ba8
        • 2.Sb5#
      • 1...Be8
        • 2.e6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(j);OGATE::B(H)+P(E),XR(j)
    • B(a);N_GUARD::QAB(B),XB(a)
    • B(i);S_CUTR(h)::QAB(B),XB(a)
    • B(i);N_GUARD::S(G),XB(i)
    • B(i);N_GUARD::S(G)
    • B(i);N_GUARD,S_CUTR(j)::QAR1(B),XP(f)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • B(a);N_GUARD::QAB1(B),XB(a)
      • Refutation
        • R(h);
    • Try
      • Q(B);CHECK,XP(f)
      • Vars
        • B(i);SBLOCK,XQ(B)::S(G)
      • Refutation
        • R(j);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • B(a);N_GUARD::QAB1(B),XB(a)
      • Refutation
        • R(h);XQ(B)
  • Actual
    • P(F);
    • Threat
      • S(G)
    • Vars
      • B(i);S_CUTR(h)::QAB(B),XB(a)
      • B(i);N_GUARD::S(G),XB(i)
      • B(i);N_GUARD::S(G)
      • B(i);N_GUARD,S_CUTR(j)::QAR1(B),XP(f)
      • B(i);S_CUTR(j)::B(H)+P(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).