MESON Chess Problem Database

Problem Display
PID: 231195 (8/1p1N2p1/2p1R3/1p1k1B2/2n5/1nB5/Q1pN3K/3R4 w - - 0 1)

Holm, Karl Helmer

Schackvarlden, 1927

8/1p1N2p1/2p1R3/1p1k1B2/2n5/1nB5/Q1pN3K/3R4

#2

8 + 8

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sbxd2
      • 2.Rxd2#
    • 1...Sc5
      • 2.Sb6#
    • 1...Scxd2
      • 2.Qxb3#
    • 1...Sd6
      • 2.Re5#
  • Tries
    • 1.Sxc4+?
      • 1...Sd2
        • 2.Sb2#
        • 2.Sxd2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sce5#
        • 2.Scb6#
        • 2.Sd6#
        • 2.Rxd2#
        • 2.Re5#
        • 2.Rd6#
      • 1...Sd4
        • 2.Sb2#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sce5#
        • 2.Scb6#
        • 2.Sd6#
        • 2.Rxd4#
        • 2.Re5#
        • 2.Rd6#
      • 1...cxd1Q
        • 2.Se3#
        • 2.Scb6#
      • 1...cxd1S
        • 2.Scb6#
      • 1...cxd1B
        • 2.Se3#
        • 2.Scb6#
      • 1...cxd1R
        • 2.Se3#
        • 2.Scb6#
      • 1...Kxc4!
    • 1.Rf6?
      • threat
        • 2.Be4#
      • 1...Sbxd2
        • 2.Rxd2#
      • 1...Scxd2
        • 2.Qxb3#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sd6
        • 2.Be6#
      • 1...gxf6!
    • 1.Qxc2?
      • threat
        • 2.Qe4#
      • 1...Sd6
        • 2.Re5#
      • 1...Sc5!
  • Keys
    • 1.Rg6!
      • threat
        • 2.Be4#
      • 1...Sbxd2
        • 2.Rxd2#
      • 1...Scxd2
        • 2.Qxb3#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sd6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE,P_SPINS(b),XS(C)::R(A),XS(b)
    • S(b);P_SPINS(c),SBLOCK::S(H)
    • S(c);OGATEB,P_SPINS(c),XS(C)::QAB(B),XS(b)
    • S(c);N_GUARD,P_SPINS(b),SBLOCK::R1(G)
  • Tries
    • Try
      • S(C);CHECK,XS(c)
      • Vars
        • P(a);XR(A)::S(C)
      • Refutation
        • K(e);P_SPINS(b),S_FLIGHT,XS(C)
    • Try
      • R(G);
      • Threat
        • B(F)
      • Vars
        • S(b);OGATE,P_SPINS(b),XS(C)::R(A),XS(b)
        • S(c);OGATEB,P_SPINS(c),XS(C)::QAB(B),XS(b)
        • S(b);P_SPINS(c),SBLOCK::S(H)
        • S(c);P_SPINS(b),SBLOCK::B(F)
      • Refutation
        • P(h);XR(G)
    • Try
      • Q(B);XP(a)
      • Threat
        • QAB1(B)
      • Vars
        • S(c);N_GUARD,SBLOCK::R1(G)
      • Refutation
        • S(b);
  • Actual
    • R(G);
    • Threat
      • B(F)
    • Vars
      • S(b);OGATE,P_SPINS(b),XS(C)::R(A),XS(b)
      • S(c);OGATEB,P_SPINS(c),XS(C)::QAB(B),XS(b)
      • S(b);P_SPINS(c),SBLOCK::S(H)
      • S(c);P_SPINS(b),SBLOCK::B(F)
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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).