MESON Chess Problem Database

Problem Display
PID: 169809 (4N3/1p4r1/rR2N3/1R2bk1B/2Q1b2P/p2p2p1/K5p1/8 w - - 0 1)

Wirtanen, Erkki Aukusti

1st HM., Finnish Problemist's Association, 1945

4N3/1p4r1/rR2N3/1R2bk1B/2Q1b2P/p2p2p1/K5p1/8

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.S6xg7#
      • 2.Qf4#
    • 1...Bc6
      • 2.S6xg7#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Ra5
        • 2.Qxe5#
      • 1...Bd5+!
    • 1.Qd4?
      • threat
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Ra5
        • 2.Qxe5#
      • 1...Bd5+!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...Rxg5
        • 2.Qf7#
      • 1...Ra4
        • 2.Rf6#
      • 1...Bf3
        • 2.Sxg7#
      • 1...Bd5
        • 2.Bg4#
      • 1...Bc6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(e);::S(G),XR(j)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);::QAR1(B),XB(f)
      • Refutation
        • B(e);CHECK,N_SPINB(f)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);::QAR1(B),XB(f)
      • Refutation
        • B(e);CHECK,N_SPINB(f)
  • Actual
    • S(G);
    • Threat
      • QAB1(B),XB(e)
    • Vars
      • K(g);N_SPINB(f),P-FLIGHT,P_SPINB(e)::QAR1(B),XB(e)
      • R(j);N_GUARD,XS(G)::QAR2(B)
      • R(h);N_GUARD::R1(F)
      • B(e);::S(H),XR(j)
      • B(e);N_SPINB(f),P_PINQ(B)::B(E)
      • B(e);OGATE::QAB1(B)
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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).