MESON Chess Problem Database

Problem Display
PID: 263980 (1BB5/r1npRpK1/p3N1P1/R1n1k1qQ/2P2p2/2P2PN1/8/2b5 w - - 0 1)

Eriksson, Finn Olof

Tijdschrift vd KNSB, 1938

1BB5/r1npRpK1/p3N1P1/R1n1k1qQ/2P2p2/2P2PN1/8/2b5

#2

12 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...d6
      • 2.Sxc7#
  • Tries
    • 1.Bxc7+?
      • 1...d6
        • 2.Sd4#
        • 2.Sxc5#
        • 2.Sxg5#
        • 2.Sd8#
        • 2.Sf8#
        • 2.Rxc5#
      • 1...Rxc7!
    • 1.Rxc5+?
      • 1...d5
        • 2.Rxd5#
      • 1...Kd6!
    • 1.Rxd7?
      • threat
        • 2.Rd5#
      • 1...fxe6
        • 2.Rxc5#
        • 2.Qxg5#
      • 1...Kxe6!
    • 1.Qxg5+?
      • 1...Kd6
        • 2.Qxc5#
      • 1...f5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sd4#
      • 1...Kf5
        • 2.Sd4#
        • 2.Qxg5#
      • 1...dxe6
        • 2.Rxc5#
      • 1...fxe6
        • 2.Qxg5#
      • 1...d5
        • 2.S6xc5#
      • 1...d6
        • 2.Sxc7#
      • 1...f5
        • 2.S6xg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(i);SBLOCK::R(I)+S(G),XS(h)
  • Tries
    • Try
      • B(K);CHECK,XS(h)
      • Refutation
        • R(g);XB(K)
    • Try
      • R(E);CHECK,P_PINS(h),XS(c)
      • Vars
        • P(i);P_SPINP(i)::R1(E),XP(i)
      • Refutation
        • K(d);N_SPINQ(e),S_FLIGHT
    • Try
      • R(I);XP(i)
      • Threat
        • R1(I)
      • Refutation
        • K(d);N_SPINQ(e),N_SPINS(c),P-FLIGHT,XS(G)
    • Try
      • Q(F);CHECK,N_SPINP(H),XQ(e)
      • Vars
        • K(d);N_SPINS(c),OGATE,P_SPINS(h),S_FLIGHT::QAB1(F),XS(c)
      • Refutation
        • P(j);P_SPINP(j)
  • Actual
    • S(C);
    • Threat
      • R(I)+S(G)
    • Vars
      • P(i);N_GUARD,P_SPINP(i),XS(G)::R(E),XS(c)
      • P(j);N_GUARD,P_SPINP(j),XS(G)::QAR2(F),XQ(e)
      • P(i);N_SPINS(c),P_SPINS(h)::R(I)+S(G),XS(c)
      • P(i);::R(I)+S(G),XS(h)
      • P(j);N_SPINQ(e),SBLOCK::R(I)+S(G),XQ(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).