MESON Chess Problem Database

Problem Display
PID: 59342 (1BKR4/3Q2P1/NpPPp3/br1k1n2/r4RN1/1P1nPp2/8/5B2 w - - 0 1)

Malmstrom, Birger Georg Christens

Brisbane Courier, 1922

1BKR4/3Q2P1/NpPPp3/br1k1n2/r4RN1/1P1nPp2/8/5B2

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.bxc4#
    • 1...Rc5
      • 2.Sc7#
    • 1...Sb4
      • 2.Bc4#
    • 1...Sc5
      • 2.Sc7#
    • 1...Se5
      • 2.Sf6#
    • 1...Sd4
      • 2.e4#
    • 1...Sxd6+
      • 2.Qxd6#
    • 1...Se7+
      • 2.dxe7#
    • 1...e5
      • 2.Sf6#
      • 2.g8Q#
      • 2.g8B#
  • Tries
    • 1.Qxe6+?
      • 1...Kxe6
        • 2.g8Q#
        • 2.g8B#
      • 1...Kxc6!
    • 1.g8S?
      • threat
        • 2.S8f6#
      • 1...Sxd6+
        • 2.Qxd6#
      • 1...Se7+
        • 2.Sxe7#
        • 2.dxe7#
      • 1...Bc3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.c7#
      • 1...Sxd6+
        • 2.Rxd6#
      • 1...Se7+
        • 2.dxe7#
      • 1...e5
        • 2.g8Q#
        • 2.g8B#
      • 1...Rc4
        • 2.bxc4#
      • 1...Rc5
        • 2.Sc7#
      • 1...Sb4
        • 2.Bc4#
      • 1...Sc5
        • 2.Sc7#
      • 1...Se5
        • 2.Sf6#
      • 1...Sd4
        • 2.e4#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,P_PINP(G)::P(B),XR(c)
    • R(e);P_PINP(G),SBLOCK::S(F)
    • S(a);OGATE::B(A)
    • S(a);SBLOCK::S(F)
    • S(a);SBLOCK::S(E)
    • S(g);SBLOCK,S_CUTR(c)::P(C)
    • S(g);CHECK,OGATE,P_SPINS(g),XP(H)::QAR1(I),XS(g)
    • S(g);CHECK,OGATE::QAR(I)+P(H),XS(g)
  • Tries
    • Try
      • Q(I);CHECK,XP(i)
      • Vars
        • K(f);S_FLIGHT,XQ(I)::P=Q
      • Refutation
        • K(f);S_FLIGHT,XP(G)
    • Try
      • P(J);
      • Threat
        • S(J)
      • Vars
        • S(g);CHECK,OGATE,P_SPINS(g),XP(H)::QAR1(I),XS(g)
      • Refutation
        • B(d);
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+P(G)
    • Vars
      • S(g);CHECK,OGATE,P_SPINS(g),XP(H)::R1(M),XS(g)
      • S(g);CHECK,OGATE::R(M)+P(H),XS(g)
      • P(i);::P=Q
      • R(c);OGATE,P_PINP(G)::P(B),XR(c)
      • R(e);P_PINP(G),SBLOCK::S(F)
      • S(a);OGATE::B(A)
      • S(a);SBLOCK::S(F)
      • S(a);SBLOCK::S(E)
      • S(g);SBLOCK,S_CUTR(c)::P(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).